WatchOS2でiPhoneに文字を送るやり方

Obj-Cを使ってiPhoneとの連携をまとめてみました。見てくれる人いるかな。

iPhone側はこんな感じのコードです。簡単過ぎて説明いらんですね。

ViewController.m

# import "ViewController.h"
# import <WatchConnectivity/WatchConnectivity.h>

@interface ViewController () <WCSessionDelegate>
@property (weak, nonatomic) IBOutlet UILabel *Label;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    if ([WCSession isSupported]) {
        WCSession *session = [WCSession defaultSession];
        session.delegate = self;
        [session activateSession];
    }
}

- (void)session:(nonnull WCSession *)session
 didReceiveApplicationContext:(nonnull NSDictionary<NSString *,id> *)applicationContext
{
    NSString *moji = [applicationContext objectForKey:@"moji"];
    dispatch_async(dispatch_get_main_queue(), ^{
        [self.Label setText:[NSString stringWithFormat:@"moji:%@",moji]];
    });
}
@end

InterfaceController.m

# import "InterfaceController.h"
# import <WatchConnectivity/WatchConnectivity.h>

@interface InterfaceController() <WCSessionDelegate>

@property (strong, nonatomic) WCSession *session;

@end

@implementation InterfaceController

-(instancetype)init {
    self = [super init];
    
    if (self) {
        if ([WCSession isSupported]) {
            self.session = [WCSession defaultSession];
            self.session.delegate = self;
            [self.session activateSession];
        }
    }
    return self;
}

- (void)awakeWithContext:(id)context {
    [super awakeWithContext:context];
}

- (void)willActivate {
    // This method is called when watch view controller is about to be visible to user
    [super willActivate];
}

- (void)didDeactivate {
    // This method is called when watch view controller is no longer visible
    [super didDeactivate];
}

// 適当にWatchKit AppのInterface.storyboardにボタンを追加して下さい
- (IBAction)Pressed {
    [self sendString:@"🐱"];
}

-(void)sendString:(NSString *)moji {
    NSDictionary *applicationDict = @{@"moji":moji};
    [self.session updateApplicationContext:applicationDict error:nil];
}

@end

普通に開発したことある人ならこれみればわかるよね？的な感じで書いてます。
Swiftもちゃんと勉強しないとなー。