了解 handleWatchKitExtensionRequest

Question

我正在 iPhone 应用程序上测试一些代码的执行。我遵循 Apple 建议的文档（不使用后台任务，仅使用 控制台日志 ）。但是我在控制台上没有得到任何东西（我想看到字符串 "howdy"）。

这是因为我是运行模拟器上的WatchKit Extension应用吗？还是我遗漏了什么？

Apple 说：

If you are using openParentApplication:reply:, make sure you create a background task immediately upon entering application:handleWatchKitExtensionRequest:reply:. This will make sure that the iPhone app gets time in the background instead of being suspended again. Additionally, wrap the call to endBackgroundTask: in a dispatch_after of 2 seconds to ensure that the iPhone app has time to send the reply before being suspended again.

我在 WatchKit 扩展上的实现（链接到按钮的操作方法）：

- (IBAction)sendMessageToApp{

    NSString *requestString = [NSString stringWithFormat:@"executeMethodA"]; // This string is arbitrary, just must match here and at the iPhone side of the implementation.
    NSDictionary *applicationData = [[NSDictionary alloc] initWithObjects:@[requestString] forKeys:@[@"theRequestString"]];

    [WKInterfaceController openParentApplication:applicationData reply:^(NSDictionary *replyInfo, NSError *error) {
        NSLog(@"\nReply info: %@\nError: %@",replyInfo, error);
    }];

    NSLog(@"sending message..");
}

我在 AppDelegate.m 文件上的实现：

- (void)application:(UIApplication *)application handleWatchKitExtensionRequest:(NSDictionary *)userInfo reply:(void(^)(NSDictionary *replyInfo))reply {
    NSString * request = [userInfo objectForKey:@"requestString"];

    NSLog(@"howdy");


    // This is just an example of what you could return. The one requirement is
    // you do have to execute the reply block, even if it is just to 'reply(nil)'.
    // All of the objects in the dictionary [must be serializable to a property list file][3].
    // If necessary, you can covert other objects to NSData blobs first.
    NSArray * objects = [[NSArray alloc] initWithObjects:[NSDate date],[NSDate date],[NSDate date], [NSDate date], nil];

    NSArray * keys = [[NSArray alloc] initWithObjects:@"objectAName", @"objectdName", @"objectBName", @"objectCName", nil];
    NSDictionary * replyContent = [[NSDictionary alloc] initWithObjects:objects forKeys:keys];

    reply(replyContent);
}

我在控制台中得到的信息：

2015-04-16 14:43:44.034 FanLink WatchKit Extension[3324:142904] <InterfaceController: 0x608000081fe0> initWithContext
2015-04-16 14:44:04.848 FanLink WatchKit Extension[3324:142904] sennding message..
2015-04-16 14:44:04.854 FanLink WatchKit Extension[3324:142904] 
Reply info: {
    objectAName = "2015-04-16 13:44:04 +0000";
    objectBName = "2015-04-16 13:44:04 +0000";
    objectCName = "2015-04-16 13:44:04 +0000";
    objectdName = "2015-04-16 13:44:04 +0000";
}
Error: (null)

Answer 1

您的控制台日志是正确的，因为您当前仅调试 WatchKit 扩展目标因此您将收到以 WatchKit 扩展编写的日志。 iOS App 中编写的 NSLog 不会在控制台打印。

Answer 2

这是因为您只是在调试 WatchKit 扩展目标。如果您还想在控制台中查看主应用程序日志，则需要通过 Xcode 调试器附加主应用程序的进程。转到调试-->附加进程-->（然后 select 通过标识符并键入你的应用程序名称）

为了更好地浏览，我为您找到了这个专门用于 WatchKit/WatchKit 扩展调试的好资源： https://mkswap.net/m/blog/How+to+debug+an+iOS+app+while+the+WatchKit+app+is+currently+running+in+the+simulator

Answer 3

不知道是不是题外话但是上面的代码中有一个简单的错误在手表套件中有 initWithObjects:@[requestString] forKeys:@[@"theRequestString"]

并在 appdelegate NSString * request = [userInfo objectForKey:@"requestString"];

"theRequestString" 不对应 "requestString"

我花了一些时间才弄明白为什么我的函数没有启动

感谢它提供的代码

了解 handleWatchKitExtensionRequest

Understanding handleWatchKitExtensionRequest

user-experience

request

ios

watchkit

ios8.3