ios - Apple Watch wkinterfacetimer 无法启动

Question

我正在开始一个 watch 开发项目。它基本上会启动和停止 watch 上的几个计时器。初始代码在 42mm 模拟器上运行良好，但在实际 watch 上运行不佳。也就是说，点击“开始”按钮开始运行 WKInterfaceTimer 标签。物理 watch 上没有任何反应。但是，我知道计时器正在工作，因为如果我在 InterfaceBuilder 中选中 Enabled，计时器会在应用程序在 watch 上启动后立即开始递增。这是 watch app extension.h 和 .m 的代码。 IB 中的 socket 连接正确。此外，点击 Dispatch 按钮可进入 Dispatch IBAction 并正常工作。我也试过关闭和打开 watch 电源。这没有帮助。

我真的很感激在这方面的一些帮助。

接口(interface) Controller .h

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#import <WatchKit/WatchKit.h>
#import <Foundation/Foundation.h>
@interface InterfaceController : WKInterfaceController
@property (unsafe_unretained, nonatomic) IBOutlet WKInterfaceTimer *ElapsedTime;
@property (unsafe_unretained, nonatomic) IBOutlet WKInterfaceLabel *dispatchTime;
@property (weak, nonatomic) NSDate *startDate;
@end
/
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interface controller.m
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#import "InterfaceController.h"
@interface InterfaceController()
@end
@implementation InterfaceController
- (void)awakeWithContext:(id)context {
    [super awakeWithContext:context];
    /
}
- (void)willActivate {
    /
    [super willActivate];
}
- (void)didDeactivate {
    /
    [super didDeactivate];
}
- (IBAction)Start {
    self.startDate = [NSDate date];
    [self.ElapsedTime setDate:self.startDate];
    [self.ElapsedTime start];
}
- (IBAction)Stop {
    [self.ElapsedTime stop];
}
- (IBAction)Dispatch {
    NSDate *date =[NSDate date];
    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
    [dateFormatter setDateStyle:NSDateFormatterNoStyle];
    [dateFormatter setTimeStyle:NSDateFormatterShortStyle];
    NSString *dateString = [dateFormatter stringFromDate:date];
    [self.dispatchTime setText:dateString];
}
@end

Answer 1

仍然不确定为什么 WKInterfaceTimer 对象不起作用。相反，我使用了一个标准的 NSTimer 对象和一个标准的 NSDate 对象。该代码有效。注意:如果您有另一个基于页面的 Storyboard 场景，第一个场景紧随其后，您必须将自定义 WkInterfaceController 对象添加到下一个场景，并将界面 Storyboard 中的导出连接到它。否则， socket 将无法连接，因为文件的所有者不正确。此外，请确保将自定义 WkInterfaceController 添加到 watch 套件扩展目标，而不是 iOS 目标。

    //
//  InterfaceController.h
//  EMSTimers WatchKit 1 Extension
//
//  Created by Nelson Capes on 12/18/15.
//  Copyright © 2015 Nelson Capes. All rights reserved.
//

#import <WatchKit/WatchKit.h>
#import <Foundation/Foundation.h>

@interface InterfaceController : WKInterfaceController
@property (weak, nonatomic) IBOutlet WKInterfaceLabel *ElapsedTime;

@property (strong, nonatomic) IBOutlet WKInterfaceLabel *dispatchTime;
@property (strong, nonatomic) NSDate *startDate;
@property (strong, nonatomic) NSDate *dateStarted;
@property (strong, nonatomic) NSTimer *elaspsedTimer;
@end

    //
//  InterfaceController.m
//  EMSTimers WatchKit 1 Extension
//
//  Created by Nelson Capes on 12/18/15.
//  Copyright © 2015 Nelson Capes. All rights reserved.
//

#import "InterfaceController.h"


@interface InterfaceController()

@end


@implementation InterfaceController

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

    // Configure interface objects here.
}
- (IBAction)Start {
    NSDate *date =[NSDate date];
    self.dateStarted = date;
    NSTimeInterval timeInterval = 1.0;
    self.elaspsedTimer = [NSTimer scheduledTimerWithTimeInterval:timeInterval target:self selector:@selector(calculateTimer:) userInfo:self.elaspsedTimer repeats:YES];
    [self.elaspsedTimer fire];
}
- (IBAction)Stop {
    [self.elaspsedTimer invalidate];
}
-(void)calculateTimer:(NSTimer *)theTimer
{

    NSTimeInterval interval = [self.dateStarted timeIntervalSinceNow];
    interval = (-1 * interval);

    int time = round(interval);
    div_t h = div(time, 3600); //seconds total, divided by 3600 equals
    int hours = h.quot;         // hours, divided by 60 equals
    div_t m = div(h.rem, 60);   // minutes
    int minutes = m.quot;
    int seconds = m.rem;        // and remainder is seconds


    NSString *intervalString = [NSString stringWithFormat:@"%02d:%02d:%02d", hours, minutes, seconds];
    [self.ElapsedTime setText:intervalString];
}
- (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];
}

@end