iOS 11 UIImagePickerController选择后取消按钮bug

Question

我正在使用UIImagePickerController来选择照片和裁剪图像。

这与以下情况相同 https://forums.developer.apple.com/thread/88286

这是我的代码：

- (void) onTest:(UIButton *)btn {
    UIImagePickerController *picker = [[UIImagePickerController alloc] init];
    picker.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;
    picker.delegate = self;
    picker.allowsEditing = YES;
    [picker setModalPresentationStyle: UIModalPresentationOverCurrentContext];
    [self presentViewController:picker animated:YES completion:nil];
}

这是视图层。我没有添加这个UIView。 我无法按下取消按钮，我无法放大/缩小。

iOS 10没有问题。我只遇到iOS 11的问题。

Answer 1

我有个好主意解决这个问题。

将控制器（从中显示UIImagePickerController）设置为UIImagePickerController的委托，然后符合UINavigationControllerDelegate，因为UIImagePickerController是{{1}的子类然后实现方法：

UINavigationController

Answer 2

- (IBAction)addPhoto:(UIButton *)sender {

    UIImagePickerController *picker = [[UIImagePickerController alloc] init];
    picker.delegate = self;
    picker.allowsEditing = YES;
    picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;

    [self presentViewController:picker animated:YES completion:NULL];
 }

使用此委托： -

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

    [picker dismissViewControllerAnimated:YES completion:NULL];

}

Answer 3

使用此代码打开照片库：

        UIImagePickerController *pickerView = [[UIImagePickerController alloc] init];
        pickerView.allowsEditing = YES;
        pickerView.delegate = self;
        [pickerView setSourceType:UIImagePickerControllerSourceTypePhotoLibrary];
        [self presentViewController:pickerView animated:YES completion:nil];

使用此委托将裁剪后的图像传送给视图控制器：

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
    UIImage *chosenImage = info[UIImagePickerControllerEditedImage];
    UIImage *image = chosenImage;
   [picker dismissViewControllerAnimated:YES completion:NULL];

}