UIImagePickerController imagePicker不适合iPhone 4屏幕

我让用户使用UIImagePickerControllerSourceTypePhotoLibrary选择图像。UIImagePickerController imagePicker不适合iPhone 4屏幕

然后，我有以下方法获取编辑后的图像，应用覆盖，然后将其传递到我的PostPictureViewController进行显示。在显示屏上，我希望图像保持其原始长宽比并将其固定在屏幕上。

它在使用4.3 sdk的模拟器上工作正常，但是当我将它放在iPhone 4视网膜显示屏上时，图像放大到左上角，只有1/4图像显示全屏摆脱原始的长宽比！

我该如何缩小它以适应屏幕，就像它可以在模拟器上工作？

我也尝试完全摆脱覆盖，只是返回原始和编辑的图像来显示，但即使这不保持其原始长宽比！

- (void) imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info 
{   
    // Access the cropped image from info dictionary 
    image = [info objectForKey:@"UIImagePickerControllerEditedImage"]; 

    // Combine image with overlay before saving!! 
    image = [self addOverlayToImage:image]; 

    overlayGraphicView.image = nil; 

    // Take the picture image to the post picture view controller 
    postPictureView = [[PostPictureViewController alloc] init:image];  
    [picker pushViewController:postPictureView animated:YES]; 

    [picker release],picker = nil; 
}

这是我的添加叠印图像功能：

- (UIImage*) addOverlayToImage:(UIImage*)originalImage 
{ 
    //CGRect cgRect =[[UIScreen mainScreen] bounds]; 
    CGSize size = originalImage.size; 

    if (UIGraphicsBeginImageContextWithOptions != NULL) { 
     // Use for iPhone 4 Retina 
     UIGraphicsBeginImageContextWithOptions(size, YES, 0.0); 
    } else { 
     UIGraphicsBeginImageContext(size); 
    } 

    UIImage* overlayImage = [UIImage imageNamed:overlayGraphicName]; 

    [originalImage drawAtPoint:CGPointMake(0,0)]; 

    [(UIImage *)overlayImage drawAtPoint:CGPointMake(0,(originalImage.size.height/2 - overlayImage.size.height/2) + 20)]; 

    UIImage *finalImage = UIGraphicsGetImageFromCurrentImageContext(); 
    [finalImage retain]; 

    UIGraphicsEndImageContext(); 

    return finalImage; 
}

最后在我的PostPictureViewController我显示在viewDidLoad中的图像：

- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 

    [self.view setBackgroundColor:[UIColor blackColor]]; 

    // Load the picker image for viewing 
    UIImageView *pickerView = [[UIImageView alloc] initWithFrame:CGRectMake(0.0f, 0.0f, 320, 480)]; 
    [pickerView setImage:pickerImage]; 
    pickerView.contentMode = UIViewContentModeScaleAspectFit; 
    [self.view addSubview:pickerView]; 
    [pickerView release],pickerView=nil; 
}

在该viewDidLoad方法用于显示图像，如果我这样做：

UIImageView *pickerView = [[UIImageView alloc] initWithImage:pickerImage];

然后图像没有在模拟器上垂直居中到屏幕上，并从0,0开始，CGRectMake使用CGRectMake实际定义帧宽度和高度，使其居中在屏幕上。

显然，对于iPhone 4的我试图改变过这个：

UIImageView *pickerView = [[UIImageView alloc] initWithFrame:CGRectMake(0.0f, 0.0f, 640, 960)];

但图像仍然放大到高，然后大屏幕！

来源

2011-06-27 GameDev

您可以在界面builder中设置imageview的属性为aspectfit。这应该通过编程来帮助或编程，您可以使用 imageView.contentMode = UIViewContentModeScaleAspectFit;

来源

2011-06-27 09:34:27

感谢您的输入，但请仔细阅读问题，我已经有了这个设置，但它似乎没有任何区别！：pickerView.contentMode = UIViewContentModeScaleAspectFit; – GameDev

有人吗？它肯定不是那么复杂？也许只是一个疏忽？！ – GameDev

UIImagePickerController imagePicker不适合iPhone 4屏幕

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