VPImageCropper微信头像选取控件

VPImageCropper 是可以实现微信选取图片并裁剪成头像的控件。

示例代码：

// callback when cropping finished
- (void)imageCropper:(VPImageCropperViewController *)cropperViewController didFinished:(UIImage *)editedImage;

// callback when cropping cancelled
- (void)imageCropperDidCancel:(VPImageCropperViewController *)cropperViewController;

// present the cropper view controller
VPImageCropperViewController *imgCropperVC = [[VPImageCropperViewController alloc] initWithImage:portraitImg cropFrame:CGRectMake(0, 100.0f, self.view.frame.size.width, self.view.frame.size.width) limitScaleRatio:3.0];
imgCropperVC.delegate = self;
[self presentViewController:imgCropperVC animated:YES completion:^{
        // TO DO
}];