用相机拍摄的照片不会在 uiimageview 中调整大小

Question

我的代码

- (IBAction)takePhoto:(UIButton *)sender {
if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]){
    UIImagePickerController *picker = [UIImagePickerController new];
    picker.delegate = self;
    picker.allowsEditing = YES;
    picker.sourceType = UIImagePickerControllerSourceTypeCamera;

    [self presentViewController:picker animated:YES completion:nil];
}else{
    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"ERROR!" message:@"Device has no camera!" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
    [alert show];
}
}

和代表

-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info{
UIImage *chosenImage = info[UIImagePickerControllerEditedImage];
self.userImage.image = chosenImage;

[picker dismissViewControllerAnimated:YES completion:NULL];
}

- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {

[picker dismissViewControllerAnimated:YES completion:NULL];

}

嗯，这非常简单和基本。我的问题是，在将我的图像分配给我拥有的 UIImageView 之后（它具有固定/固定的宽度和高度），而不是将自身调整为 uiimageview 的大小，它在我的整个视图中延伸，更多地作为图像放置的背景它应该在哪里。同样，我的 uiimageview 的宽度和高度已被固定。有人可以帮忙吗？谢谢

Answer 1

UIImageView 的 contentMode 应该是 UIViewContentModeScaleAspectFit，而不是看起来的 UIViewContentModeCenter。

如果您需要即时更改内容模式，只需添加以下行：

-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info{
    UIImage *chosenImage = info[UIImagePickerControllerEditedImage];
    self.userImage.image = chosenImage;

    // Add this line
    self.userImage.contentMode = UIViewContentModeScaleAspectFit;

    [picker dismissViewControllerAnimated:YES completion:NULL];
}