如何在Objective-C的OS2中将数据从Iphone发送到Apple Watch

问题描述

我看过一个关于如何在 Swift 中来回发送数据的类似问题.我在问同样的问题，但在 Objective-C 中.我还查看了 Apple 的过渡文档.

I've seen a similar question posted on how to send data back and forth in Swift. I'm asking the same question but in Objective-C. I've also viewed Apple's transition docs.

我最擅长使用清晰的例子，而不是讲课材料.因此，如果有人已经实现了这一点并且不介意分享，那将不胜感激.

I work best with clear examples, rather than lecture material. So if someone has implemented this and wouldn't mind sharing, that would be much appreciated.

推荐答案

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这是关于 WatchConnectivity 的问答链接:在 watchOS2 中使用 WatchConnectivity 在 iOS 和 WatchOS 之间发送消息

我会给你一个例子 go ApplicationContext，还有另外 2 种使用 WatchConnectivity 的消息传递技术.请观看 WWDC2015 会议视频.

I will give you an example go ApplicationContext, there are 2 other messaging techniques with WatchConnectivity. Please watch WWDC2015 session video for those.

首先，您需要在要从/向其发送和接收数据的类中符合 WCSessionDelegate 协议.例如在手表和 iPhone 上.

First you need to conform to the WCSessionDelegate protocol in the classes you want to send and receive data from/to. E.g both on watch and iPhone.

之前的基本检查:(这只是一个例子，比这个更好实现)

Basic checking before: (this is just an example, implement better than this)

if ([WCSession isSupported]) {
        WCSession *session = [WCSession defaultSession];
        session.delegate = self;
        [session activateSession];
        NSLog(@"SESSION AVAIBLE");
    }

    //Objective-C
    if ([[WCSession defaultSession] isReachable]) {
        NSLog(@"SESSION REACHABLE");
    }

这会将数据从手机发送到手表.

This will send the data from the phone to the watch.

WCSession *session = [WCSession defaultSession];
NSError *error;

[session updateApplicationContext:@{@"firstItem": @"item1", @"secondItem":[NSNumber numberWithInt:2]} error:&error];

这将从手表上的手机接收数据.

This will receive the data from the phone on the watch.

- (void) session:(nonnull WCSession *)session didReceiveApplicationContext:(nonnull NSDictionary<NSString *,id> *)applicationContext {

    NSLog(@"%@", applicationContext);


    item1 = [applicationContext objectForKey:@"firstItem"];
    item2 = [[applicationContext objectForKey:@"secondItem"] intValue];
}

WatchConnectivity 上的 WWDC2015 视频真的很棒，我建议您查看一下.

The WWDC2015 video on WatchConnectivity is really great, I recommend to check it out.

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