Question

我在进程启动时创建一条消息（BOOL YES）并且我试图让它在结束时消失（BOOL NO），调试显示我在开始和结束时单步执行整个功能，但是消息还在那里。

我哪里错了？提前谢谢

-(void) loadStillLoadingMessage:(BOOL)yesNo{
CGRect screenBound = [[UIScreen mainScreen] bounds];
CGSize screenSize = screenBound.size;
CGFloat screenWidth = screenSize.width;
CGFloat screenHeight = screenSize.height;
UILabel *loading = [[[UILabel alloc]initWithFrame:CGRectMake((screenWidth/2)-75,(screenHeight)-140,300,40)]autorelease];

loading.text = @"still loading";
loading.backgroundColor = [UIColor clearColor];
loading.textColor = [UIColor blueColor];
loadingLabel = loading;
[self.view addSubview:loadingLabel];
[loadingLabel setHidden:YES];
if (yesNo == YES) {
    [loadingLabel setHidden:NO];
}else if (yesNo ==NO){
    [loadingLabel setHidden:YES];
}

}

Answer 1

此方法在调用时创建UIView。因此，您第一次创建和显示的UIView与您创建的UIView不同，第二次显示然后隐藏。您需要查看实例变量（在头文件中声明变量）。

Answer 2

您遇到的问题是您没有从self.view中删除旧的加载。

-(void) loadStillLoadingMessage:(BOOL)yesNo{
    CGRect screenBound = [[UIScreen mainScreen] bounds];
    CGSize screenSize = screenBound.size;
    CGFloat screenWidth = screenSize.width;
    CGFloat screenHeight = screenSize.height;
    UILabel *loading = [[[UILabel alloc]initWithFrame:CGRectMake((screenWidth/2)-75,    (screenHeight)-140,300,40)]autorelease];

    loading.text = @"still loading";
    loading.backgroundColor = [UIColor clearColor];
    loading.textColor = [UIColor blueColor];
    loadingLabel = loading;

    //removing the previous label from the self.view if exist
    loadingLabel.tag = 999;
    [[self.view viewWithTag:999] removeFromSuperview];

    [self.view addSubview:loadingLabel];
    [loadingLabel setHidden:YES];
    if (yesNo == YES) {
         [loadingLabel setHidden:NO];
    }else if (yesNo ==NO){
      [loadingLabel setHidden:YES];
    }

}

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2 个答案: