Question

情景是。

1）我已经存在适用于iPhone设备的iOS应用程序。该应用程序在仪表板页面中显示实时数据。通过从iOS应用程序调用Web服务，每60秒更新一次仪表板上的数据。

2）我想开发基于相同iPhone应用程序的Apple Watch应用程序，每隔60秒就会显示一次数据更新的仪表板。

如何实现这一目标。任何建议都非常感谢。感谢。

Answer 1

我有相同的场景要执行。所以我在我的应用程序中所做的是：

didFinishLaunchingWithOptions

中的AppDelegate.m方法

timer =  [NSTimer scheduledTimerWithTimeInterval:120 target:self selector:@selector(refreshData) userInfo:nil repeats:YES];

refreshData方法看起来像

-(void)refreshData
{
    // Update Database Calls
    // below line Save new time when update request goes to server every time.
    [[NSUserDefaults standardUserDefaults] setObject:[NSDate date] forKey:@"databaseUpdateTimestamp"]; // 
}

现在在willActivate

中的watchKit方法中添加计时器

 timer = [NSTimer scheduledTimerWithTimeInterval:120 target:self selector:@selector(refreshData) userInfo:nil repeats:YES];

refreshData方法将每隔2分钟向父App调用一次请求。

- (void) refreshData
{
     NSDictionary *dic = [[NSDictionary alloc] initWithObjectsAndKeys:@"database",@"update", nil];
     [WKInterfaceController openParentApplication:dic reply:^(NSDictionary *replyInfo, NSError *error)
     {
         NSLog(@"%@ %@",replyInfo, error);
     }];
}

现在在您的App Appate in Parent App中

- (void)application:(UIApplication *)application handleWatchKitExtensionRequest:(NSDictionary *)userInfo reply:(void(^)(NSDictionary *replyInfo))reply
{
    if([userInfo objectForKey:@"update"])
    {
        NSString *strChceckDB = [userInfo objectForKey:@"update"];
        if ([strChceckDB isEqualToString:@"database"]) 
        {
            NSDate *dateNow = [NSDate date];
            NSDate *previousUpdatedTime = (NSDate*)[[NSUserDefaults standardUserDefaults] objectForKey:@"databaseUpdateTimestamp"];
            NSTimeInterval distanceBetweenDates = [dateNow timeIntervalSinceDate:previousUpdatedTime];
            if (distanceBetweenDates>120) // this is to check that no data request is in progress 
            {
                [self.timer invalidate]; // your orignal timer in iPhone App 
                self.timer = nil;
                [self refreshData]; //Method to Get New Records from Server
                [self addTimer]; // Add it again for normal update calls
            }
        } 
    }
    else
    {
    //do something else
    }
}

使用此更新数据在WatchKit App中填充您的应用程序仪表板。

一些有用的链接可以帮助您完成此任务：

You can create an embedded framework to share code between your app extension and its containing app。

Adding an App to an App Group

希望这能帮助你...... !!!

监视工具包显示来自服务器的更新数据

1 个答案: