ios - 拍照后如何显示 UIView？

Question

拍照后我需要显示 UIView（UIView 显示加载消息）。

每次我需要显示加载消息时，我都会使用以下代码：

NSArray* loading = [[NSBundle mainBundle] loadNibNamed:@"LoadingViewController"
                                                     owner:self
                                                   options:nil];

self.loadingView = [ loading objectAtIndex: 0];

[self.view addSubview:self.loadingView];
[self.view bringSubviewToFront:self.loadingView];
self.loadingView is the loading UIView.

按下“完成”按钮（拍照后）后，我需要显示 UIView loadingView，我尝试这样做：

- (void)imagePickerController:(UIImagePickerController *)picker
didFinishPickingMediaWithInfo:(NSDictionary *)info
{
    NSArray* loading = [[NSBundle mainBundle] loadNibNamed:@"LoadingViewController"
                                                     owner:self
                                                   options:nil];

    self.loadingView = [ loading objectAtIndex: 0];

    [picker.navigationBar addSubview:self.loadingView];
    [picker.navigationBar bringSubviewToFront:self.loadingView];
    /*image processing*/
}

但不工作。我也尝试改变：

[picker.navigationBar addSubview:self.loadingView];
[picker.navigationBar bringSubviewToFront:self.loadingView];

和

[picker.view addSubview:self.loadingView];
[picker.view bringSubviewToFront:self.loadingView];

Answer 1

首先，我建议您使用库来加载 UIView，例如SVProgressHUD

此外，您需要使用 Threads 来做您想做的事情，看看这个链接