iphone：如何停止快门动画？ [英] iphone : how to stop shutter animation?

问题描述

我有2个问题。

1）我想知道如何在装入相机时停止快门动画？我正在使用UIImagePickerController。我已经从堆栈溢出中提到了许多答案，但没有成功。

1) I want to know how can I stop animation of shutter when camera is loaded ? I am using UIImagePickerController. I have referred many answer from stack overflow but did not get succeed.

2）我在相机中使用 cameraOverlayView 进行自定义按钮，并希望在点击时打开照片库。我的代码如下：

2) I have a custom button in camera using cameraOverlayView and want to open the photo library on click. I have code like :

- (void) showLibrabryPicker
{
    pickerLibrary = [[UIImagePickerController alloc] init];
    pickerLibrary.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
    pickerLibrary.delegate = self;
    [self presentModalViewController:pickerLibrary animated:YES];
    [pickerLibrary release];
}

在相机显示时调用它。

Thnaks ...

Thnaks...

推荐答案

使用 UIImagePickerController ，关于初始快门动画你无能为力。它实际上是隐藏启动时间。您可以切换到使用AVFoundation并获得 AVCaptureVideoPreviewLayer ，它没有快门动画，但是在要求开始和开始之间仍然会有延迟。我不是硬件专家，但我认为延迟是因为电源管理单元通常将整个子系统断电。

Using a UIImagePickerController, there's nothing you can do about that initial shutter animation. It's actually there to hide the startup time. You can switch to using the AVFoundation and getting an AVCaptureVideoPreviewLayer, which has no shutter animation, but you still get a latency between asking for the feed to start and it starting. I'm no hardware expert but I assume the delay is because the power management unit normally has that whole subsystem powered down.

showLibraryPicker的代码看起来或多或少是正确的，尽管你可能在错误的演员身上调用 presentModalViewController：animated：。 UIImagePickerController 是一个视图控制器，所以如果你还没有子类化（也就是说，你写的代码本身并不是你扮演<$的东西的一部分） c $ c> UIImagePickerController ）然后你要做 [pickerController presentModalViewController：...] 。

Your code for showLibraryPicker looks more or less correct, though you may be calling presentModalViewController:animated: on the wrong actor. UIImagePickerController is a view controller, so if you haven't subclassed that (ie, the code you're writing is not itself part of the thing you have acting as a UIImagePickerController) then you'll want to do [pickerController presentModalViewController:...].

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