iOS – Objective-C – 小部件文本和图像加倍 – 旧数据不会被清除

在iOS应用程序小部件中,我只能在某些设备上看到双倍的数据(见下图).我试图识别设备,iOS版本,但它似乎是“随机的”.另外,我自己无法对此进行调试,因为在我的每个设备上,所有设备都正确呈现并且盲目调试无法正常工作(AppStore上的多次更新但仍然存在相同的错误).

在小部件中,我从Web下载(在后台线程中)新数据并将它们(在dispatch_get_main_queue()中)放入标签,图像等中.一切正常,但有时旧数据不会被“清除”.在我的小部件设计文件中,我已经清除了所有“默认”文本,所以这不是这个问题.

加倍图标&文本4.1°C和7.9°C是重叠的

我的小部件代码的主要部分是(通过删除其他标签,表格和地理位置缩短)：

- (void)viewDidLoad
{
    [super viewDidLoad];
    if ([self.extensionContext respondsToSelector:@selector(widgetLargestAvailableDisplayMode)])
    {
        //this is iOS >= 10                
        self.extensionContext.widgetLargestAvailableDisplayMode = NCWidgetDisplayModeExpanded;
    }


    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(FinishDownload:) name:@"FinishDownload" object:nil];


    self.preferredContentSize = CGSizeMake(320,160);

     [self updateData];
}

-(void)viewDidAppear:(BOOL)animated
{
    [super viewDidAppear:animated];

    [self updateData];
}

-(void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];

    [self updateData];
}

-(void)updateData
{

    [[[DataManager SharedManager] settings] Reload];


    [[CoreDataManager SharedManager] reset];

    if ([[DataManager SharedManager] DownloadDataWithAfterSelector:@"FinishDownload"] == NO)
        {
            //no need to download update - refill data Now
            //if downloading - wait for download
            [self FillData];
        }
    }


}


-(void)FinishDownload:(NSNotification *)notification
{
    dispatch_async(dispatch_get_main_queue(),^{
        [self FillData];
    });

}

-(void)FillData
{
    //a lot of code - example of setting temperature
    NSString *str = [NSString stringWithFormat:@"%@ °C",act.temp_act];
    self.lblTemp.text = str;
    [self.lblTemp sizeToFit];


    if (self.completionHandler != nil)
    {
        self.completionHandler(NCUpdateResultNewData);
    }
}



- (void)widgetPerformUpdateWithCompletionHandler:(void (^)(NCUpdateResult))completionHandler
{
    // Perform any setup necessary in order to update the view.

    // If an error is encountered,use NCUpdateResultFailed
    // If there's no update required,use NCUpdateResultNoData
    // If there's an update,use NCUpdateResultNewData

    //completionHandler(NCUpdateResultNewData);
    NSLog(@"=== widgetPerformUpdateWithCompletionHandler === ");

    self.completionHandler = completionHandler;

    [self updateData];


}

- (UIEdgeInsets)widgetMarginInsetsForProposedMarginInsets:(UIEdgeInsets)defaultMarginInsets
{
    return UIEdgeInsetsMake(0,5,5);
}


- (void)widgetActiveDisplayModeDidChange:(NCWidgetDisplayMode)activeDisplayMode withMaximumSize:(CGSize)maxSize
{
    if (activeDisplayMode == NCWidgetDisplayModeExpanded)
    {
        self.preferredContentSize = CGSizeMake(320,160);            
    }
    else if (activeDisplayMode == NCWidgetDisplayModeCompact)
    {
        self.preferredContentSize = maxSize;            
    }
}

if (nil != self.completionHandler) {
    self.completionHandler(NCUpdateResultNewData);
    self.completionHandler = nil; // One time use
}