UIImagePickerController 从 UIViewController 返回后出现白屏答案

【问题标题】：UIImagePickerController got white screen after returning from a UIViewControllerUIImagePickerController 从 UIViewController 返回后出现白屏
【发布时间】：2011-07-14 04:02:19
【问题描述】：

情况如下：

拍照后从

[UIImagePickerController takePicture];

以下委托函数：

-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info

将被调用。

里面的代码是

NSLog(@"Photo taken");
UIImage *newImage = [self resizeImage:[info objectForKey:UIImagePickerControllerOriginalImage]];
NSLog(@"Width: %d, Height: %d ",(int)newImage.size.width, (int)newImage.size.height);
//[imagePickerController dismissModalViewControllerAnimated:YES];
ProcessCompleteView *pcv = [[ProcessCompleteView alloc] initWithNibName:@"ProcessCompleteView" bundle:nil];
[imagePickerController presentModalViewController:pcv animated:YES];
[pcv release];

我调用了另一个视图来显示某事，当我使用 dismissModalViewController 从 pcv 返回时，应该显示相机实时捕获的区域变成白色。但是，当我关闭 UIImagePickerController 并再次呈现它时，相机工作正常！

谁能帮我解决这个奇怪的问题？？

谢谢。

【问题讨论】：

标签： iphone uiimagepickercontroller

【解决方案1】：

显示视图的顺序不正确。

正确的顺序是：父控制器的视图展示 -> UIImagePickerController 的视图展示 -> UIImagePickerController 的视图隐藏 -> ProcessCompleteView 展示

所以，请删除

ProcessCompleteView *pcv = [[ProcessCompleteView alloc] initWithNibName:@"ProcessCompleteView" bundle:nil];
[imagePickerController presentModalViewController:pcv animated:YES];
[pcv release];

进入父控制器的 viewWillAppear 方法，并调用

ProcessCompleteView *pcv = [[ProcessCompleteView alloc] initWithNibName:@"ProcessCompleteView" bundle:nil];
[parentController presentModalViewController:pcv animated:YES];
[pcv release];

【讨论】：