ios - iPhone App 中的 UIApplicationDelegate 从未调用过回复

Question

我正在尝试使用以下代码从 watch 模拟器启动我的 iPhone 应用程序:

WKInterfaceController 子类

[WKInterfaceController openParentApplication:[NSDictionary dictionaryWithObject:@"red" forKey:@"color"] reply:^(NSDictionary *replyInfo, NSError *error) {
NSLog(@"replyInfo %@",replyInfo);
NSLog(@"Error: %@",error);
}];

AppDelegate.m

- (void)application:(UIApplication *)application handleWatchKitExtensionRequest:(NSDictionary *)userInfo reply:(void(^)(NSDictionary *replyInfo))reply
{
NSLog(@"appdelegate handleWatchKitExtensionRequest");
NSLog(@"NSDictionary: %@",userInfo);
NSLog(@"replyInfo: %@",replyInfo);
}

我得到的错误是:

Error: Error Domain=com.apple.watchkit.errors Code=2 "The UIApplicationDelegate in the iPhone App never called reply() in -[UIApplicationDelegate application:handleWatchKitExtensionRequest:reply:]" UserInfo=0x7f8603227730 {NSLocalizedDescription=The UIApplicationDelegate in the iPhone App never called reply() in -[UIApplicationDelegate application:handleWatchKitExtensionRequest:reply:]}

Answer 1

您需要调用回复 block ，即使您返回 nil。以下将解决您的错误:

- (void)application:(UIApplication *)application handleWatchKitExtensionRequest:(NSDictionary *)userInfo reply:(void(^)(NSDictionary *replyInfo))reply
{
NSLog(@"appdelegate handleWatchKitExtensionRequest");
NSLog(@"NSDictionary: %@",userInfo);
NSLog(@"replyInfo: %@",replyInfo);
reply(nil);
}

参见 the Apple documentation了解更多信息。您还可以返回一个 NSDictionary reply(myNSDictionary); 以及返回到您的 Watchkit 扩展的任何有用的信息，尽管字典只能包含可以序列化到属性列表文件的信息，所以例如，您可以传递字符串，但不能只传递包含对自定义类实例的引用的字典，而不先将它们打包为 NSData。