ModalViewController中的UIImageView忽略ContentMode - iPhone

Question

我正在展示一個模式視圖，並將UIImageView設置爲內容模式填充比例（通過xib）。我設置的模式視圖類一個UIImage從父類的縮略圖：

NSURL * finishedMovie = [self applicationDocumentsDirectory:@"FinishedVideo.mov"]; 
MPMoviePlayerController *player = [[MPMoviePlayerController alloc] initWithContentURL:finishedMovie]; 
UIImage *thumbnail = [player thumbnailImageAtTime:1.0 timeOption:MPMovieTimeOptionNearestKeyFrame]; 

previewScreen = [[PreviewScreenViewController alloc]initWithNibName:@"PreviewScreenViewController" bundle:nil]; 
previewScreen.thumbnailImage = thumbnail; 
[self presentModalViewController:previewScreen animated:YES]; 

然後在模態視圖類本身：

- (void)viewDidLoad 
{ 
[super viewDidLoad]; 
// Do any additional setup after loading the view from its nib. 
previewImageBox.image = thumbnailImage; 

} 

的問題是，當視圖顯示，它似乎忽略了在xib中設置的內容模式，只是將圖像以完整大小插入。

這看起來像一個錯誤，因爲當我回到這個視圖時，圖像正好適合UIImage視圖。

任何人都可以幫忙嗎？

謝謝。

Answer 1

好的解決了！如果你在代碼中手動創建UIImageView，它似乎工作。

// Do any additional setup after loading the view from its nib. 
//Work around to solve bug in UIToolkit where aspect ratio is ignored when view loads. 
imageView = [[UIImageView alloc] initWithFrame:CGRectMake(13, 87, 294, 164)]; 
//Set the image to our thumbnail. 
[self.view addSubview:imageView]; 

Answer 2

更可能的是你有clipsToBounds屬性設置爲NO。這將阻止UIImageView剪輯其內容之外的內容。您可以設置UIImageView圖層的borderColor以查看這是否實際發生。