/**
 *   判斷app安裝版本和商店版本的比較
 */
-(void)judgeAPPVersion
{
    //    https://itunes.apple.com/lookup?id=604685049
    
    NSString *urlStr = @"https://itunes.apple.com/lookup?id=604685049";
    NSURL *url = [NSURL URLWithString:urlStr];
    NSURLRequest *req = [NSURLRequest requestWithURL:url];
    [NSURLConnection connectionWithRequest:req delegate:self];
}
/**
 *  解析網路請求下的資料，並提示alertView
 */
-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
    NSError *error;
    id jsonObject = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingAllowFragments error:&error];
    NSDictionary *appInfo = (NSDictionary *)jsonObject;
    NSArray *infoContent = [appInfo objectForKey:@"results"];
    NSString *version = [[infoContent objectAtIndex:0] objectForKey:@"version"];
    
    NSLog(@"商店的版本是 %@",version);
    
    NSDictionary *infoDic = [[NSBundle mainBundle] infoDictionary];
    NSString *currentVersion = [infoDic objectForKey:@"CFBundleShortVersionString"];
    NSLog(@"當前的版本是 %@",currentVersion);
    
    
    if (![version isEqualToString:currentVersion])
    {
        UIAlertController * alert=[UIAlertController alertControllerWithTitle:@"提示" message:@"商店有版本更新" preferredStyle:UIAlertControllerStyleAlert];
        [alert addAction:[UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
            //確定，跳轉到appstore
            [self changeToAppStore];
            
        }]];
        
        [alert addAction:[UIAlertAction actionWithTitle:@"NO" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {
            //取消，不做任何事情
        }]];
        
        
        [self presentViewController:alert animated:YES completion:^{
        }];
    }
    
}
//跳轉到AppStore
-(void)changeToAppStore
{
    NSURL *myUrl = [NSURL URLWithString:@"QQMusic://abcde"];
    
    if([[UIApplication sharedApplication] canOpenURL:myUrl])
    {
        [[UIApplication sharedApplication] openURL:myUrl];
    }else
    {
        [[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"https://itunes.apple.com/cn/app/qq-yin-le-du-jia-zhong-guo/id414603431?mt=8"]];
    }
}

/**
 *  注意： 在IOS9之後，跳轉白名單需要在info.plist中新增  LSApplicationQueriesSchemes （是個Array型別） 再在Item0 中新增路徑 ： QQMusic
 */






//非同步執行緒去下載
    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
        [self judgeAPPVersion];
    });

//必要時需要返回主程式呼叫方法
dispatch_sync(dispatch_get_main_queue(), ^(){
    // 這裡的程式碼會在主執行緒執行
   [self presentViewController:alert animated:YES completion:nil];

});