ios - 单击 "cross"按钮后无法从 super View 中删除 UIProgressView？

Question

我陷入了隐藏的问题。我想从 Superview 中删除所有 UIProgressView。我正在以这种方式创建十字按钮，

crossButton = [[CCMenuItemImage alloc] initWithNormalSprite:[CCSprite spriteWithSpriteFrame:[[CCSpriteFrameCache sharedSpriteFrameCache] spriteFrameByName:@"close-bttn.png"]] selectedSprite:nil disabledSprite:nil block:^(id sender)
                                     {
                                         [self hideProgressBarForDownload];
                                         [[NSNotificationCenter defaultCenter] postNotificationName:kNotificationInAppLayerClosed object:self userInfo:nil];
                                         [[GameManager sharedGameManager]setCurrentLayer:-1];
                                         [self removeFromParentAndCleanup:YES];
                                     }];

点击时，会分层调用以下方法

-(void) hideProgressBarForDownload
{
    [[DownloadManager sharedDownloadManager]removeAllProgressbarsIfvisible];
}

-(void)removeAllProgressbarsIfvisible
{
    NSArray * allkeys = [currentDownloads allKeys];

    for (int i = 0; i < [allkeys count]; i++)
    {
        NSString *key = [allkeys objectAtIndex:i];
        DownloadItem * item = [currentDownloads valueForKey:key];
        UIProgressView * progress = item.progressIndicator;
        //progress.hidden = YES;
        if (progress.superview)
        {
            [progress removeFromSuperview];
        }
    }
 }

我猜每一段代码都是正确的，但不知道为什么他们没有删除。

提前致谢。

Answer 1

尝试这样，在按钮操作操作方法中放置此代码

for(UIView *view in self.view.subviews){
        if([view isKindOfClass:[UIProgressView class]]))
            [view removeFromSuperView];
    }