ios demo

HttpDNSSDK/sdk/ios/NewHttpDNSTestDemo/DemoConfig.plist

@@ -2,11 +2,13 @@
 <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
 <plist version="1.0">
 <dict>
-	<key>accountID</key>
+	<key>appId</key>
-	<integer>139450</integer>
+	<string>app1flndpo9</string>
-	<key>secretKey</key>
+	<key>primaryServiceHost</key>
-	<string>807a19762f8eaefa8563489baf198535</string>
+	<string>httpdns.deepwaf.xyz</string>
-	<key>aesSecretKey</key>
+	<key>servicePort</key>
-	<string>82c0af0d0cb2d69c4f87bb25c2e23929</string>
+	<integer>8445</integer>
+	<key>signSecret</key>
+	<string></string>
 </dict>
 </plist>

HttpDNSSDK/sdk/ios/NewHttpDNSTestDemo/DemoConfigLoader.h

@@ -1,21 +1,17 @@
 //
 //  DemoConfigLoader.h
-//  TrustHttpDNSTestDemo
+//  NewHttpDNSTestDemo
-//
-//  @author Created by Claude Code on 2025-10-05
 //
 
 #import <Foundation/Foundation.h>
 
 @interface DemoConfigLoader : NSObject
 
-@property (nonatomic, assign, readonly) NSInteger accountID;
+@property (nonatomic, copy, readonly) NSString *appId;
-@property (nonatomic, copy, readonly) NSString *secretKey;
+@property (nonatomic, copy, readonly) NSString *primaryServiceHost;
-@property (nonatomic, copy, readonly) NSString *aesSecretKey;
+@property (nonatomic, assign, readonly) NSInteger servicePort;
-
+@property (nonatomic, copy, readonly, nullable) NSString *signSecret;
-@property (nonatomic, assign, readonly) BOOL hasValidAccount;
 
 + (instancetype)shared;
 
 @end
-

HttpDNSSDK/sdk/ios/NewHttpDNSTestDemo/DemoConfigLoader.m

@@ -1,17 +1,15 @@
 //
 //  DemoConfigLoader.m
-//  TrustHttpDNSTestDemo
+//  NewHttpDNSTestDemo
-//
-//  @author Created by Claude Code on 2025-10-05
 //
 
 #import "DemoConfigLoader.h"
 
 @implementation DemoConfigLoader {
-    NSInteger _accountID;
+    NSString *_appId;
-    NSString *_secretKey;
+    NSString *_primaryServiceHost;
-    NSString *_aesSecretKey;
+    NSInteger _servicePort;
-    BOOL _hasValidAccount;
+    NSString *_signSecret;
 }
 
 + (instancetype)shared {
@@ -30,56 +28,23 @@
     return self;
 }
 
-// 复杂逻辑：配置加载顺序为 Bundle > 环境变量；并<EFBFBD><EFBFBD>?accountID 进行有效性校<EFBFBD><EFBFBD>?
 - (void)loadConfig {
-    _accountID = 0;
+    NSDictionary *dict = nil;
-    _secretKey = @"";
-    _aesSecretKey = @"";
-    _hasValidAccount = NO;
-
-    NSDictionary *bundleDict = nil;
     NSString *plistPath = [[NSBundle mainBundle] pathForResource:@"DemoConfig" ofType:@"plist"];
     if (plistPath.length > 0) {
-        bundleDict = [NSDictionary dictionaryWithContentsOfFile:plistPath];
+        dict = [NSDictionary dictionaryWithContentsOfFile:plistPath];
     }
 
-    NSDictionary *env = [[NSProcessInfo processInfo] environment];
+    _appId = dict[@"appId"] ?: @"";
-
+    _primaryServiceHost = dict[@"primaryServiceHost"] ?: @"";
-    NSNumber *acc = bundleDict[@"accountID"]; // NSNumber preferred in plist
+    _servicePort = [dict[@"servicePort"] integerValue] ?: 443;
-    NSString *secret = bundleDict[@"secretKey"] ?: @"";
+    NSString *secret = dict[@"signSecret"] ?: @"";
-    NSString *aes = bundleDict[@"aesSecretKey"] ?: @"";
+    _signSecret = secret.length > 0 ? secret : nil;
-
-    NSString *envAcc = env[@"HTTPDNS_ACCOUNT_ID"];
-    NSString *envSecret = env[@"HTTPDNS_SECRET_KEY"];
-    NSString *envAes = env[@"HTTPDNS_AES_SECRET_KEY"];
-
-    if (envAcc.length > 0) {
-        acc = @([envAcc integerValue]);
-    }
-    if (envSecret.length > 0) {
-        secret = envSecret;
-    }
-    if (envAes.length > 0) {
-        aes = envAes;
-    }
-
-    if (acc != nil && [acc integerValue] > 0 && secret.length > 0) {
-        _accountID = [acc integerValue];
-        _secretKey = secret;
-        _aesSecretKey = aes ?: @"";
-        _hasValidAccount = YES;
-    } else {
-        _accountID = 0;
-        _secretKey = @"";
-        _aesSecretKey = @"";
-        _hasValidAccount = NO;
-    }
 }
 
-- (NSInteger)accountID { return _accountID; }
+- (NSString *)appId { return _appId; }
-- (NSString *)secretKey { return _secretKey; }
+- (NSString *)primaryServiceHost { return _primaryServiceHost; }
-- (NSString *)aesSecretKey { return _aesSecretKey; }
+- (NSInteger)servicePort { return _servicePort; }
-- (BOOL)hasValidAccount { return _hasValidAccount; }
+- (NSString *)signSecret { return _signSecret; }
 
 @end
-

HttpDNSSDK/sdk/ios/NewHttpDNSTestDemo/DemoHttpdnsScenario.h

@@ -1,13 +1,10 @@
 //
 //  DemoHttpdnsScenario.h
-//  TrustHttpDNSTestDemo
+//  NewHttpDNSTestDemo
-//
-//  @author Created by Claude Code on 2025-10-23
 //
 
 #import <Foundation/Foundation.h>
 #import "DemoResolveModel.h"
-#import "HttpdnsService.h"
 
 NS_ASSUME_NONNULL_BEGIN
 
@@ -16,10 +13,7 @@ NS_ASSUME_NONNULL_BEGIN
 @interface DemoHttpdnsScenarioConfig : NSObject <NSCopying>
 
 @property (nonatomic, copy) NSString *host;
-@property (nonatomic, assign) HttpdnsQueryIPType ipType;
+@property (nonatomic, copy) NSString *queryType; // @"A", @"AAAA", @"both"
-@property (nonatomic, assign) BOOL httpsEnabled;
-@property (nonatomic, assign) BOOL persistentCacheEnabled;
-@property (nonatomic, assign) BOOL reuseExpiredIPEnabled;
 
 - (instancetype)init;
 
@@ -39,6 +33,7 @@ NS_ASSUME_NONNULL_BEGIN
 
 - (instancetype)initWithDelegate:(id<DemoHttpdnsScenarioDelegate>)delegate;
 - (void)applyConfig:(DemoHttpdnsScenarioConfig *)config;
+- (void)resolve;
 - (void)resolveSyncNonBlocking;
 - (void)resolveSync;
 - (NSString *)logSnapshot;
@@ -46,4 +41,3 @@ NS_ASSUME_NONNULL_BEGIN
 @end
 
 NS_ASSUME_NONNULL_END
-

HttpDNSSDK/sdk/ios/NewHttpDNSTestDemo/DemoHttpdnsScenario.m

@@ -1,12 +1,11 @@
-//
+//
 //  DemoHttpdnsScenario.m
 //  NewHttpDNSTestDemo
 //
-//  @author Created by Claude Code on 2025-10-23
-//
 
 #import "DemoHttpdnsScenario.h"
 #import "DemoConfigLoader.h"
+#import <NewHTTPDNS/HttpdnsEdgeService.h>
 
 @interface DemoHttpdnsScenarioConfig ()
 @end
@@ -15,11 +14,8 @@
 
 - (instancetype)init {
     if (self = [super init]) {
-        _host = @"www.new.com";
+        _host = @"demo.cloudxdr.com";
-        _ipType = HttpdnsQueryIPTypeBoth;
+        _queryType = @"A";
-        _httpsEnabled = YES;
-        _persistentCacheEnabled = YES;
-        _reuseExpiredIPEnabled = YES;
     }
     return self;
 }
@@ -27,18 +23,15 @@
 - (id)copyWithZone:(NSZone *)zone {
     DemoHttpdnsScenarioConfig *cfg = [[[self class] allocWithZone:zone] init];
     cfg.host = self.host;
-    cfg.ipType = self.ipType;
+    cfg.queryType = self.queryType;
-    cfg.httpsEnabled = self.httpsEnabled;
-    cfg.persistentCacheEnabled = self.persistentCacheEnabled;
-    cfg.reuseExpiredIPEnabled = self.reuseExpiredIPEnabled;
     return cfg;
 }
 
 @end
 
-@interface DemoHttpdnsScenario () <HttpdnsLoggerProtocol, HttpdnsTTLDelegate>
+@interface DemoHttpdnsScenario ()
 
-@property (nonatomic, strong) HttpDnsService *service;
+@property (nonatomic, strong) HttpdnsEdgeService *service;
 @property (nonatomic, strong) DemoHttpdnsScenarioConfig *config;
 @property (nonatomic, strong) NSMutableString *logBuffer;
 @property (nonatomic, strong) dispatch_queue_t logQueue;
@@ -55,73 +48,76 @@
         _logBuffer = [NSMutableString string];
         _logQueue = dispatch_queue_create("com.new.httpdns.demo.log", DISPATCH_QUEUE_SERIAL);
         [self buildService];
-        [self applyConfig:_config];
     }
     return self;
 }
 
 - (void)buildService {
     DemoConfigLoader *cfg = [DemoConfigLoader shared];
-    if (cfg.hasValidAccount) {
+    self.service = [[HttpdnsEdgeService alloc]
-        if (cfg.aesSecretKey.length > 0) {
+        initWithAppId:cfg.appId
-            self.service = [[HttpDnsService alloc] initWithAccountID:cfg.accountID secretKey:cfg.secretKey aesSecretKey:cfg.aesSecretKey];
+   primaryServiceHost:cfg.primaryServiceHost
-        } else {
+    backupServiceHost:nil
-            self.service = [[HttpDnsService alloc] initWithAccountID:cfg.accountID secretKey:cfg.secretKey];
+          servicePort:cfg.servicePort
-        }
+           signSecret:cfg.signSecret];
-    } else {
+    [self appendLog:[NSString stringWithFormat:@"[init] appId=%@ host=%@:%ld", cfg.appId, cfg.primaryServiceHost, (long)cfg.servicePort]];
-        self.service = [HttpDnsService sharedInstance];
-    }
-    [self.service setLogEnabled:YES];
-    [self.service setNetworkingTimeoutInterval:8];
-    [self.service setDegradeToLocalDNSEnabled:YES];
-    self.service.ttlDelegate = self;
-    [self.service setLogHandler:self];
 }
 
 - (void)applyConfig:(DemoHttpdnsScenarioConfig *)config {
     self.config = [config copy];
     self.model.host = self.config.host;
-    self.model.ipType = self.config.ipType;
+}
-    [self.service setHTTPSRequestEnabled:self.config.httpsEnabled];
+
-    [self.service setPersistentCacheIPEnabled:self.config.persistentCacheEnabled];
+- (void)resolve {
-    [self.service setReuseExpiredIPEnabled:self.config.reuseExpiredIPEnabled];
+    [self resolveSyncNonBlocking];
 }
 
 - (void)resolveSyncNonBlocking {
-    NSString *queryHost = [self currentHost];
+    NSString *host = self.config.host.length > 0 ? self.config.host : @"demo.cloudxdr.com";
-    HttpdnsQueryIPType ipType = self.config.ipType;
+    NSString *queryType = self.config.queryType.length > 0 ? self.config.queryType : @"A";
     NSTimeInterval startMs = [[NSDate date] timeIntervalSince1970] * 1000.0;
-    HttpdnsResult *result = [self.service resolveHostSyncNonBlocking:queryHost byIpType:ipType];
+
-    [self handleResult:result host:queryHost ipType:ipType start:startMs];
+    [self appendLog:[NSString stringWithFormat:@"[resolve] host=%@ type=%@", host, queryType]];
+
+    __weak typeof(self) weakSelf = self;
+    [self.service resolveHost:host queryType:queryType completion:^(HttpdnsEdgeResolveResult *result, NSError *error) {
+        [weakSelf handleResult:result host:host queryType:queryType start:startMs error:error];
+    }];
 }
 
 - (void)resolveSync {
-    NSString *queryHost = [self currentHost];
+    [self resolveSyncNonBlocking];
-    HttpdnsQueryIPType ipType = self.config.ipType;
-    dispatch_async(dispatch_get_global_queue(QOS_CLASS_USER_INITIATED, 0), ^{
-        NSTimeInterval startMs = [[NSDate date] timeIntervalSince1970] * 1000.0;
-        HttpdnsResult *result = [self.service resolveHostSync:queryHost byIpType:ipType];
-        [self handleResult:result host:queryHost ipType:ipType start:startMs];
-    });
 }
 
-- (NSString *)logSnapshot {
+- (void)handleResult:(HttpdnsEdgeResolveResult *)result
-    __block NSString *snapshot = @"";
+                host:(NSString *)host
-    dispatch_sync(self.logQueue, ^{
+           queryType:(NSString *)queryType
-        snapshot = [self.logBuffer copy];
+               start:(NSTimeInterval)startMs
-    });
+               error:(NSError *)error {
-    return snapshot;
+    NSTimeInterval elapsedMs = [[NSDate date] timeIntervalSince1970] * 1000.0 - startMs;
-}
 
-- (NSString *)currentHost {
+    if (error != nil) {
-    return self.config.host.length > 0 ? self.config.host : @"www.new.com";
+        [self appendLog:[NSString stringWithFormat:@"[error] %@", error.localizedDescription]];
-}
+    } else {
+        [self appendLog:[NSString stringWithFormat:@"[result] requestId=%@ ipv4=%@ ipv6=%@ ttl=%ld elapsed=%.0fms",
+            result.requestId, result.ipv4s, result.ipv6s, (long)result.ttl, elapsedMs]];
+    }
 
-- (void)handleResult:(HttpdnsResult *)result host:(NSString *)host ipType:(HttpdnsQueryIPType)ipType start:(NSTimeInterval)startMs {
     dispatch_async(dispatch_get_main_queue(), ^{
         self.model.host = host;
-        self.model.ipType = ipType;
+        if (result != nil) {
-        [self.model updateWithResult:result startTimeMs:startMs];
+            self.model.ipv4s = result.ipv4s;
+            self.model.ipv6s = result.ipv6s;
+            self.model.ttlV4 = result.ipv4s.count > 0 ? result.ttl : 0;
+            self.model.ttlV6 = result.ipv6s.count > 0 ? result.ttl : 0;
+            self.model.error = nil;
+        } else {
+            self.model.ipv4s = @[];
+            self.model.ipv6s = @[];
+            self.model.error = error;
+        }
+        self.model.elapsedMs = elapsedMs;
+
         id<DemoHttpdnsScenarioDelegate> delegate = self.delegate;
         if (delegate != nil) {
             [delegate scenario:self didUpdateModel:self.model];
@@ -129,12 +125,9 @@
     });
 }
 
-- (void)log:(NSString *)logStr {
+- (void)appendLog:(NSString *)msg {
-    if (logStr.length == 0) {
+    if (msg.length == 0) return;
-        return;
+    NSString *line = [NSString stringWithFormat:@"%@ %@\n", [NSDate date], msg];
-    }
-    NSString *line = [NSString stringWithFormat:@"%@ %@\n", [NSDate date], logStr];
-    // 使用串行队列保证日志追加与快照的一致性
     dispatch_async(self.logQueue, ^{
         [self.logBuffer appendString:line];
         id<DemoHttpdnsScenarioDelegate> delegate = self.delegate;
@@ -146,8 +139,12 @@
     });
 }
 
-- (int64_t)httpdnsHost:(NSString *)host ipType:(NewHttpDNS_IPType)ipType ttl:(int64_t)ttl {
+- (NSString *)logSnapshot {
-    return ttl;
+    __block NSString *snapshot = @"";
+    dispatch_sync(self.logQueue, ^{
+        snapshot = [self.logBuffer copy];
+    });
+    return snapshot;
 }
 
 @end

HttpDNSSDK/sdk/ios/NewHttpDNSTestDemo/DemoResolveModel.h

@@ -1,27 +1,18 @@
 //
 //  DemoResolveModel.h
-//  TrustHttpDNSTestDemo
+//  NewHttpDNSTestDemo
-//
-//  @author Created by Claude Code on 2025-10-05
 //
 
 #import <Foundation/Foundation.h>
-#import "HttpdnsRequest.h"
-#import "HttpdnsResult.h"
 
 @interface DemoResolveModel : NSObject
 
 @property (nonatomic, copy) NSString *host;
-@property (nonatomic, assign) HttpdnsQueryIPType ipType;
-
 @property (nonatomic, copy) NSArray<NSString *> *ipv4s;
 @property (nonatomic, copy) NSArray<NSString *> *ipv6s;
-
 @property (nonatomic, assign) NSTimeInterval elapsedMs;
 @property (nonatomic, assign) NSTimeInterval ttlV4;
 @property (nonatomic, assign) NSTimeInterval ttlV6;
-
+@property (nonatomic, strong, nullable) NSError *error;
-- (void)updateWithResult:(HttpdnsResult *)result startTimeMs:(NSTimeInterval)startMs;
 
 @end
-

HttpDNSSDK/sdk/ios/NewHttpDNSTestDemo/DemoResolveModel.m

@@ -1,9 +1,7 @@
-//
+//
 //  DemoResolveModel.m
 //  NewHttpDNSTestDemo
 //
-//  @author Created by Claude Code on 2025-10-05
-//
 
 #import "DemoResolveModel.h"
 
@@ -11,32 +9,15 @@
 
 - (instancetype)init {
     if (self = [super init]) {
-        _host = @"www.new.com";
+        _host = @"demodemo.cloudxdr.com";
-        _ipType = HttpdnsQueryIPTypeBoth;
         _ipv4s = @[];
         _ipv6s = @[];
         _elapsedMs = 0;
         _ttlV4 = 0;
         _ttlV6 = 0;
+        _error = nil;
     }
     return self;
 }
 
-- (void)updateWithResult:(HttpdnsResult *)result startTimeMs:(NSTimeInterval)startMs {
-    NSTimeInterval now = [[NSDate date] timeIntervalSince1970] * 1000.0;
-    _elapsedMs = MAX(0, now - startMs);
-    if (result != nil) {
-        _ipv4s = result.ips ?: @[];
-        _ipv6s = result.ipv6s ?: @[];
-        _ttlV4 = result.ttl;
-        _ttlV6 = result.v6ttl;
-    } else {
-        _ipv4s = @[];
-        _ipv6s = @[];
-        _ttlV4 = 0;
-        _ttlV6 = 0;
-    }
-}
-
 @end
-

HttpDNSSDK/sdk/ios/NewHttpDNSTestDemo/DemoViewController.m

@@ -1,8 +1,6 @@
-//
-//  DNSDemoViewController.m
-//  NewHttpDNSTestDemo
 //
-//  @author Created by Claude Code on 2025-10-05
+//  DemoViewController.m
+//  NewHttpDNSTestDemo
 //
 
 #import "DemoViewController.h"
@@ -20,15 +18,10 @@
 @property (nonatomic, strong) UIStackView *stack;
 
 @property (nonatomic, strong) UITextField *hostField;
-@property (nonatomic, strong) UISegmentedControl *ipTypeSeg;
+@property (nonatomic, strong) UISegmentedControl *queryTypeSeg;
-
-@property (nonatomic, strong) UISwitch *swHTTPS;
-@property (nonatomic, strong) UISwitch *swPersist;
-@property (nonatomic, strong) UISwitch *swReuse;
 
 @property (nonatomic, strong) UILabel *elapsedLabel;
 @property (nonatomic, strong) UILabel *ttlLabel;
-
 @property (nonatomic, strong) UITextView *resultTextView;
 
 @property (nonatomic, weak) DemoLogViewController *presentedLogVC;
@@ -46,7 +39,8 @@
     self.scenarioConfig = [[DemoHttpdnsScenarioConfig alloc] init];
     [self buildUI];
     [self reloadUIFromModel:self.model];
-    self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"日志" style:UIBarButtonItemStylePlain target:self action:@selector(onShowLog)];
+    self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc]
+        initWithTitle:@"日志" style:UIBarButtonItemStylePlain target:self action:@selector(onShowLog)];
 }
 
 - (void)buildUI {
@@ -73,57 +67,36 @@
         [self.stack.widthAnchor constraintEqualToAnchor:self.view.widthAnchor constant:-32]
     ]];
 
+    // Host 输入
     UIStackView *row1 = [self labeledRow:@"Host"];
     self.hostField = [[UITextField alloc] init];
-    self.hostField.placeholder = @"www.new.com";
+    self.hostField.placeholder = @"demodemo.cloudxdr.com";
     self.hostField.text = self.scenarioConfig.host;
     self.hostField.borderStyle = UITextBorderStyleRoundedRect;
     [row1 addArrangedSubview:self.hostField];
     [self.stack addArrangedSubview:row1];
 
-    UIStackView *row2 = [self labeledRow:@"IP Type"];
+    // 查询类型
-    self.ipTypeSeg = [[UISegmentedControl alloc] initWithItems:@[@"IPv4", @"IPv6", @"Both"]];
+    UIStackView *row2 = [self labeledRow:@"类型"];
-    self.ipTypeSeg.selectedSegmentIndex = [self segmentIndexForIpType:self.scenarioConfig.ipType];
+    self.queryTypeSeg = [[UISegmentedControl alloc] initWithItems:@[@"A (IPv4)", @"AAAA (IPv6)", @"both"]];
-    [self.ipTypeSeg addTarget:self action:@selector(onIPTypeChanged:) forControlEvents:UIControlEventValueChanged];
+    self.queryTypeSeg.selectedSegmentIndex = 0;
-    [row2 addArrangedSubview:self.ipTypeSeg];
+    [self.queryTypeSeg addTarget:self action:@selector(onQueryTypeChanged:) forControlEvents:UIControlEventValueChanged];
+    [row2 addArrangedSubview:self.queryTypeSeg];
     [self.stack addArrangedSubview:row2];
 
-    UIStackView *opts = [[UIStackView alloc] init];
+    // 解析按钮
-    opts.axis = UILayoutConstraintAxisHorizontal;
+    UIButton *btnResolve = [self filledButton:@"Resolve" action:@selector(onResolve)];
-    opts.alignment = UIStackViewAlignmentCenter;
+    [self.stack addArrangedSubview:btnResolve];
-    opts.distribution = UIStackViewDistributionFillEqually;
-    opts.spacing = 8;
-    [self.stack addArrangedSubview:opts];
-
-    [opts addArrangedSubview:[self switchItem:@"HTTPS" action:@selector(onToggleHTTPS:) out:&_swHTTPS]];
-    [opts addArrangedSubview:[self switchItem:@"持久化" action:@selector(onTogglePersist:) out:&_swPersist]];
-    [opts addArrangedSubview:[self switchItem:@"复用过期" action:@selector(onToggleReuse:) out:&_swReuse]];
-
-    self.swHTTPS.on = self.scenarioConfig.httpsEnabled;
-    self.swPersist.on = self.scenarioConfig.persistentCacheEnabled;
-    self.swReuse.on = self.scenarioConfig.reuseExpiredIPEnabled;
-    [self applyOptionSwitches];
-
-    UIStackView *actions = [[UIStackView alloc] init];
-    actions.axis = UILayoutConstraintAxisHorizontal;
-    actions.spacing = 12;
-    actions.distribution = UIStackViewDistributionFillEqually;
-    [self.stack addArrangedSubview:actions];
-
-    UIButton *btnAsync = [self filledButton:@"Resolve (SyncNonBlocing)" action:@selector(onResolveAsync)];
-    UIButton *btnSync = [self borderButton:@"Resolve (Sync)" action:@selector(onResolveSync)];
-    [actions addArrangedSubview:btnAsync];
-    [actions addArrangedSubview:btnSync];
 
+    // 耗时 / TTL
     UIStackView *info = [self labeledRow:@"Info"];
     self.elapsedLabel = [self monoLabel:@"elapsed: - ms"];
-    self.ttlLabel = [self monoLabel:@"ttl v4/v6: -/- s"];
+    self.ttlLabel = [self monoLabel:@"ttl: -"];
     [info addArrangedSubview:self.elapsedLabel];
     [info addArrangedSubview:self.ttlLabel];
     [self.stack addArrangedSubview:info];
-    if (@available(iOS 11.0, *)) { [self.stack setCustomSpacing:24 afterView:info]; }
-
 
+    // 结果
     UILabel *resultTitle = [[UILabel alloc] init];
     resultTitle.text = @"结果";
     resultTitle.font = [UIFont preferredFontForTextStyle:UIFontTextStyleHeadline];
@@ -135,18 +108,66 @@
     if (@available(iOS 13.0, *)) {
         self.resultTextView.font = [UIFont monospacedSystemFontOfSize:12 weight:UIFontWeightRegular];
         self.resultTextView.textColor = [UIColor labelColor];
-    } else {
-        self.resultTextView.font = [UIFont systemFontOfSize:12];
-        self.resultTextView.textColor = [UIColor blackColor];
     }
     self.resultTextView.backgroundColor = [UIColor clearColor];
     self.resultTextView.textContainerInset = UIEdgeInsetsMake(8, 12, 8, 12);
     [self.stack addArrangedSubview:self.resultTextView];
     [self.resultTextView.heightAnchor constraintEqualToConstant:320].active = YES;
-
-
 }
 
+#pragma mark - Actions
+
+- (void)onQueryTypeChanged:(UISegmentedControl *)seg {
+    NSArray *types = @[@"A", @"AAAA", @"both"];
+    self.scenarioConfig.queryType = types[seg.selectedSegmentIndex];
+    [self.scenario applyConfig:self.scenarioConfig];
+}
+
+- (void)onResolve {
+    [self.view endEditing:YES];
+    NSString *host = self.hostField.text.length > 0 ? self.hostField.text : @"demodemo.cloudxdr.com";
+    self.scenarioConfig.host = host;
+    [self.scenario applyConfig:self.scenarioConfig];
+    [self.scenario resolve];
+}
+
+- (void)onShowLog {
+    DemoLogViewController *logVC = [DemoLogViewController new];
+    [logVC setInitialText:[self.scenario logSnapshot]];
+    self.presentedLogVC = logVC;
+    UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:logVC];
+    nav.modalPresentationStyle = UIModalPresentationAutomatic;
+    [self presentViewController:nav animated:YES completion:nil];
+}
+
+- (void)reloadUIFromModel:(DemoResolveModel *)model {
+    self.model = model;
+    if (![self.hostField isFirstResponder]) {
+        self.hostField.text = model.host;
+    }
+    self.elapsedLabel.text = [NSString stringWithFormat:@"elapsed: %.0f ms", model.elapsedMs];
+    self.ttlLabel.text = [NSString stringWithFormat:@"ttl v4/v6: %.0f/%.0f s", model.ttlV4, model.ttlV6];
+    self.resultTextView.text = [self buildResultText:model];
+}
+
+- (NSString *)buildResultText:(DemoResolveModel *)model {
+    if (model.error != nil) {
+        return [NSString stringWithFormat:@"Error:\n%@", model.error.localizedDescription];
+    }
+    NSDictionary *dict = @{
+        @"host":    model.host ?: @"",
+        @"elapsed": [NSString stringWithFormat:@"%.0f ms", model.elapsedMs],
+        @"ttl":     @{ @"v4": @(model.ttlV4), @"v6": @(model.ttlV6) },
+        @"ipv4":    model.ipv4s ?: @[],
+        @"ipv6":    model.ipv6s ?: @[]
+    };
+    NSData *data = [NSJSONSerialization dataWithJSONObject:dict options:NSJSONWritingPrettyPrinted error:nil];
+    if (data == nil) return @"{}";
+    return [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
+}
+
+#pragma mark - Helpers
+
 - (UIStackView *)labeledRow:(NSString *)title {
     UIStackView *row = [[UIStackView alloc] init];
     row.axis = UILayoutConstraintAxisHorizontal;
@@ -164,8 +185,6 @@
     l.text = text;
     if (@available(iOS 13.0, *)) {
         l.font = [UIFont monospacedSystemFontOfSize:12 weight:UIFontWeightRegular];
-    } else {
-        l.font = [UIFont systemFontOfSize:12];
     }
     return l;
 }
@@ -181,131 +200,6 @@
     return b;
 }
 
-- (UIButton *)borderButton:(NSString *)title action:(SEL)sel {
-    UIButton *b = [UIButton buttonWithType:UIButtonTypeSystem];
-    [b setTitle:title forState:UIControlStateNormal];
-    b.layer.borderWidth = 1;
-    b.layer.borderColor = [UIColor systemBlueColor].CGColor;
-    b.layer.cornerRadius = 8;
-    [b.heightAnchor constraintEqualToConstant:44].active = YES;
-    [b addTarget:self action:sel forControlEvents:UIControlEventTouchUpInside];
-    return b;
-}
-
-- (UIView *)switchItem:(NSString *)title action:(SEL)sel out:(UISwitch * __strong *)outSwitch {
-    UIStackView *box = [[UIStackView alloc] init];
-    box.axis = UILayoutConstraintAxisVertical;
-    box.alignment = UIStackViewAlignmentCenter;
-    UILabel *l = [[UILabel alloc] init];
-    l.text = title;
-    UISwitch *s = [[UISwitch alloc] init];
-    [s addTarget:self action:sel forControlEvents:UIControlEventValueChanged];
-    [box addArrangedSubview:s];
-    [box addArrangedSubview:l];
-    if (outSwitch != NULL) {
-        *outSwitch = s;
-    }
-    return box;
-}
-
-- (NSInteger)segmentIndexForIpType:(HttpdnsQueryIPType)ipType {
-    switch (ipType) {
-        case HttpdnsQueryIPTypeIpv4: { return 0; }
-        case HttpdnsQueryIPTypeIpv6: { return 1; }
-        default: { return 2; }
-    }
-}
-
-#pragma mark - Actions
-
-- (void)onIPTypeChanged:(UISegmentedControl *)seg {
-    HttpdnsQueryIPType type = HttpdnsQueryIPTypeBoth;
-    switch (seg.selectedSegmentIndex) {
-        case 0: type = HttpdnsQueryIPTypeIpv4; break;
-        case 1: type = HttpdnsQueryIPTypeIpv6; break;
-        default: type = HttpdnsQueryIPTypeBoth; break;
-    }
-    self.model.ipType = type;
-    self.scenarioConfig.ipType = type;
-    [self.scenario applyConfig:self.scenarioConfig];
-}
-
-- (void)applyOptionSwitches {
-    self.scenarioConfig.httpsEnabled = self.swHTTPS.isOn;
-    self.scenarioConfig.persistentCacheEnabled = self.swPersist.isOn;
-    self.scenarioConfig.reuseExpiredIPEnabled = self.swReuse.isOn;
-    [self.scenario applyConfig:self.scenarioConfig];
-}
-
-- (void)onToggleHTTPS:(UISwitch *)s { [self applyOptionSwitches]; }
-- (void)onTogglePersist:(UISwitch *)s { [self applyOptionSwitches]; }
-- (void)onToggleReuse:(UISwitch *)s { [self applyOptionSwitches]; }
-
-- (void)onResolveAsync {
-    [self.view endEditing:YES];
-    NSString *host = self.hostField.text.length > 0 ? self.hostField.text : @"www.new.com";
-    self.model.host = host;
-    self.scenarioConfig.host = host;
-    [self.scenario applyConfig:self.scenarioConfig];
-    [self.scenario resolveSyncNonBlocking];
-}
-
-- (void)onResolveSync {
-    [self.view endEditing:YES];
-    NSString *host = self.hostField.text.length > 0 ? self.hostField.text : @"www.new.com";
-    self.model.host = host;
-    self.scenarioConfig.host = host;
-    [self.scenario applyConfig:self.scenarioConfig];
-    [self.scenario resolveSync];
-}
-
-- (void)onShowLog {
-    DemoLogViewController *logVC = [DemoLogViewController new];
-    [logVC setInitialText:[self.scenario logSnapshot]];
-    self.presentedLogVC = logVC;
-    UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:logVC];
-    nav.modalPresentationStyle = UIModalPresentationAutomatic;
-    [self presentViewController:nav animated:YES completion:nil];
-}
-
-- (void)reloadUIFromModel:(DemoResolveModel *)model {
-    self.model = model;
-    if (![self.hostField isFirstResponder]) {
-        self.hostField.text = model.host;
-    }
-    NSInteger segIndex = [self segmentIndexForIpType:model.ipType];
-    if (self.ipTypeSeg.selectedSegmentIndex != segIndex) {
-        self.ipTypeSeg.selectedSegmentIndex = segIndex;
-    }
-    self.elapsedLabel.text = [NSString stringWithFormat:@"elapsed: %.0f ms", model.elapsedMs];
-    self.ttlLabel.text = [NSString stringWithFormat:@"ttl v4/v6: %.0f/%.0f s", model.ttlV4, model.ttlV6];
-    self.resultTextView.text = [self buildJSONText:model];
-}
-
-
-- (NSString *)buildJSONText:(DemoResolveModel *)model {
-    NSString *ipTypeStr = @"both";
-    switch (model.ipType) {
-        case HttpdnsQueryIPTypeIpv4: { ipTypeStr = @"ipv4"; break; }
-        case HttpdnsQueryIPTypeIpv6: { ipTypeStr = @"ipv6"; break; }
-        default: { ipTypeStr = @"both"; break; }
-    }
-    NSDictionary *dict = @{
-        @"host": model.host ?: @"",
-        @"ipType": ipTypeStr,
-        @"elapsedMs": @(model.elapsedMs),
-        @"ttl": @{ @"v4": @(model.ttlV4), @"v6": @(model.ttlV6) },
-        @"ipv4": model.ipv4s ?: @[],
-        @"ipv6": model.ipv6s ?: @[]
-    };
-    NSError *err = nil;
-    NSData *data = [NSJSONSerialization dataWithJSONObject:dict options:NSJSONWritingPrettyPrinted error:&err];
-    if (data == nil || err != nil) {
-        return [NSString stringWithFormat:@"{\n  \"error\": \"%@\"\n}", err.localizedDescription ?: @"json serialize failed"];
-    }
-    return [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
-}
-
 #pragma mark - DemoHttpdnsScenarioDelegate
 
 - (void)scenario:(DemoHttpdnsScenario *)scenario didUpdateModel:(DemoResolveModel *)model {