Question

我可以使用Image picker controller裁剪圆形图像吗？

我在项目中显示的图片是圆形的，使用下面的代码

 CALayer *image = profileImageView.layer;
        [image  setCornerRadius:50];
        [image  setMasksToBounds:YES];

        [image setBorderColor:[[UIColor whiteColor]CGColor]];
        [image setBorderWidth:5];

到目前为止，我有这个代码来裁剪图像，但它只是使它们成为正方形

   - (void)showPhotoLibary
    {
        if (([UIImagePickerController isSourceTypeAvailable:
              UIImagePickerControllerSourceTypeSavedPhotosAlbum] == NO)) {
            return;
        }

        UIImagePickerController *mediaUI = [[UIImagePickerController alloc] init];
        mediaUI.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;

        // Displays saved pictures from the Camera Roll album.
        mediaUI.mediaTypes = @[(NSString*)kUTTypeImage];

        // Hides the controls for moving & scaling pictures
        mediaUI.allowsEditing = YES;


        mediaUI.delegate = self;


        [self presentViewController:mediaUI animated:YES completion:nil];
    }


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

        UIImage *originalImage = (UIImage *) [info objectForKey:UIImagePickerControllerOriginalImage];
        self.profileImageView.image = originalImage;



        [picker dismissViewControllerAnimated:YES completion:nil];

    }

Answer 1

导入#import <QuartzCore/QuartzCore.h> inyour.h文件

   self.profileImageView.layer.cornerRadius = imageView.frame.size.width/2;  //or 20.0
   self.profileImageView.layer.masksToBounds = YES;

Answer 2

导入＆＃34; QuartzCore框架＆＃34;访问＆＃34; .cornerRadius属性＆＃34;您的UIView或UIImageView。

#import <QuartzCore/QuartzCore.h>

还可以手动将其添加到项目的Frameworks文件夹中。将此方法添加到视图控制器或您需要的任何位置：

-(void)setRoundedView:(UIImageView *)roundedView toDiameter:(float)newSize;
{
    CGPoint saveCenter = roundedView.center;
    CGRect newFrame = CGRectMake(roundedView.frame.origin.x, roundedView.frame.origin.y, newSize, newSize);
    roundedView.frame = newFrame;
    roundedView.layer.cornerRadius = newSize / 2.0;
    roundedView.center = saveCenter;
}

Answer 3

如果要显示圆圈UIImageView，可以按照以下步骤进行操作

profileImageView.layer.cornerRadius = imageView.frame.size.width/2;

profileImageView.clipsToBounds = YES;

如果要将原始图像源更改为圆形，则必须执行一些图像绘制过程。

Answer 4

检查您是否已将QuartzCore framework添加到项目中。然后你可以做下面的事情导入#import <QuartzCore/QuartzCore.h> .m或.h文件

- (void)viewDidLoad
 {
   [self.profileImageView.layer setCornerRadius:50];
   [self.profileImageView.layer setMasksToBounds:YES];
   [self.profileImageView.layer setBorderColor:[[UIColor whiteColor]CGColor]];
   [self.profileImageView.layer setBorderWidth:5];
 }

- (void) imagePickerController: (UIImagePickerController *) picker didFinishPickingMediaWithInfo: (NSDictionary *) info 
 {
   UIImage *originalImage = (UIImage *) [info objectForKey:UIImagePickerControllerEditedImage]; //it returns the edited image, 
   self.profileImageView.image = originalImage;
   [picker dismissViewControllerAnimated:YES completion:nil];

 }

UIImagePickerController - 裁剪图片到圆圈

4 个答案: