小编Bra*_*Mcq的帖子

我想在我的应用程序中实现一个可隐藏的UITabBar.我已经设置了所有的动画,但它们的效果非常好.我只是在让我的UIButton"拉片"显示标签栏时遇到问题.它没有响应触摸事件UIControlEventTouchUpInside.我将拉片添加到UITabBarController中的UITabBar:

- (void)viewDidLoad
{
    [super viewDidLoad];
//Add pull
    pullButton = [UIButton buttonWithType:UIButtonTypeCustom];
    UIImage *image = [UIImage imageNamed:@"TabBarPull.png"];
    pullButton.frame = CGRectMake(self.tabBar.frame.size.width - image.size.width, -image.size.height + 3, image.size.width, image.size.height);
    [pullButton setImage:image forState:UIControlStateNormal];
    [pullButton addTarget:self action:@selector(pullBarTapped:) forControlEvents:UIControlEventTouchUpInside];
    pullButton.userInteractionEnabled = YES;
    [self.tabBar addSubview:pullButton];
}

标签栏看起来像是打开和关闭的:

编辑:我已经确定问题是因为按钮落在UITabBar的框架之外.看起来我将不得不把按钮放在UITabBar ...动画噩梦之外.

我在一个透明的UIView下有一个UIScrollView.我需要将所有平移和点击转移到滚动视图(仅水平滚动).常规UIView使用UIPanGestureRecognizer的子类来跟踪垂直平移(此处找到的子类).在覆盖视图中,我覆盖触摸事件方法以将它们传递给UIScrollView.

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    [super touchesBegan:touches withEvent:event];
    [self.scrollView.panGestureRecognizer touchesBegan:touches withEvent:event];
    [self.scrollView.singleTapGesture touchesBegan:touches withEvent:event];
}

- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event
{
    [super touchesCancelled:touches withEvent:event];
    [self.scrollView.panGestureRecognizer touchesCancelled:touches withEvent:event];
    [self.scrollView.singleTapGesture touchesCancelled:touches withEvent:event];
}

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
    [super touchesEnded:touches withEvent:event];
    [self.scrollView.panGestureRecognizer touchesEnded:touches withEvent:event];
    [self.scrollView.singleTapGesture touchesEnded:touches withEvent:event];
}

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
    [super touchesMoved:touches withEvent:event];
    [self.scrollView.panGestureRecognizer touchesMoved:touches withEvent:event];
    [self.scrollView.singleTapGesture touchesMoved:touches withEvent:event];
}

叠加视图,垂直平移工作完美.在UIScrollView中,水龙头也可以完美运行.滚动但不是那么多.滚动视图滚动大约三个点,然后停止(因为我继续使用水平平移.)如果我放开速度,滚动视图然后选择该速度并完成滚动.

导致滚动视图停止滚动然后获取速度的可能问题是什么？

在我的应用程序中,当用户进行应用内购买时,应用程序需要下载zip文件并将其解压缩到应用程序的文档文件夹中.zip文件下载并可以解压缩.我正在使用Objective Zip来解压缩档案.问题是,在尝试为每个文件创建文件夹路径时,永远不会创建文件夹,也没有错误.

以下是发生这种情况的部分的示例代码:

// Create file manager
NSFileManager *fileMgr = [NSFileManager defaultManager];

//Unzip
NSString *applicationDocumentsDir = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
ZipFile *unzipFile = [[ZipFile alloc] initWithFileName:[applicationDocumentsDir stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.zip",@"Mid America Oireachtas 2011"]] mode:ZipFileModeUnzip];
NSArray *infos= [unzipFile listFileInZipInfos];
for (FileInZipInfo *info in infos) {
    //NSLog(@"- %@ %@ %d (%d)", info.name, info.date, info.size, info.level);

    // Locate the file in the zip
    [unzipFile locateFileInZip:info.name];

    // Expand the file in memory
    ZipReadStream *read= [unzipFile readCurrentFileInZip];
    NSMutableData *data= [[NSMutableData alloc] initWithLength:info.length];
    int bytesRead = …

我正在通过互联网异步下载四个 plist 文件。我需要等到所有四个文件都下载完毕，直到我在第一次运行时推送 UIViewController 或在所有后续运行中刷新数据并重新加载我的所有 UITableViews。

在第一次运行时，一切正常。刷新时，所有四个 url 请求都被调用和启动，但从不调用它们的完成或失败块，并且 UI 冻结。这很奇怪，因为我在后台线程中执行所有操作。我一直无法弄清楚为什么会发生这种情况。

第一次加载和刷新方法以相同的方式调用四个“更新”方法，并以相同的方式使用 NSCondition。

对于第一次运行：

- (void)loadContentForProgram:(NSString *)programPath
{
    NSLog(@"Start Load Program");
    AppDelegate *myDelegate = (AppDelegate *)[UIApplication sharedApplication].delegate;
    hud = [[MBProgressHUD alloc] initWithView:myDelegate.window];
    [myDelegate.window addSubview:hud];
    hud.labelText = @"Loading...";
    hud.detailsLabelText = @"Loading Data";
    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0), ^{
        //Do stuff here to load data from files

        //Update From online files
        hud.detailsLabelText = @"Updating Live Data";
        resultLock = NO;
        progressLock = NO;
        recallLock = NO;
        stageLock = NO;

        condition = [[NSCondition alloc] init];
        [condition lock]; …

我有一个UITableViewCell我要加五UIButtons.我以编程方式创建按钮,添加动作和图像.按钮放置在正确的位置,动作正常,标签已设置,但它们是清晰的.图像没有显示.

这是我用来创建其中一个按钮并将它们添加到单元格中,此代码位于tableView:cellForRowAtIndexPath::

if ([[self.compCompletion objectForKey:@"Key" isEqualToString:@"YES"]) {
            UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
            button.frame = CGRectMake(11, 6, 21, 21);
            button.tag = 1;
            [button addTarget:self action:@selector(changeCompStatus:) forControlEvents:UIControlEventTouchUpInside];
            [button setImage:[UIImage imageNamed:@"Comp-Completed.png"] forState:UIControlStateNormal];
            [button setContentMode:UIViewContentModeScaleToFill];
            [cell.contentView addSubview:button];
        }
        else {
            UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
            button.frame = CGRectMake(11, 6, 21, 21);
            button.tag = 1;
            [button addTarget:self action:@selector(changeCompStatus:) forControlEvents:UIControlEventTouchUpInside];
            [button setImage:[UIImage imageNamed:@"Comp-Uncompleted.png"] forState:UIControlStateNormal];
            [button setContentMode:UIViewContentModeScaleToFill];
            [cell.contentView addSubview:button];
        }

我试过添加:[button setEnabled:YES];,[button setHidden:NO];并且[button setNeedsDislpay];没有运气的过程.如何获得显示图像的按钮？

编辑: …