使用UIImagePicker时如何摆脱从UIImagePickerControllerEditedImage返回的图像上的黑底 [英] How to get rid of the black ground on the image returned from UIImagePickerControllerEditedImage when using UIImagePicker

问题描述

使用UIImagePicker时，它可以进入编辑"模式.然后，对于以横向模式拍摄的图像，如果用户未在UIImagePicker中手动缩放图像，则图像的顶部和底部将有黑色条纹/背景.有没有办法摆脱这种情况并使图像的该部分透明?

When using UIImagePicker, it allows to get into Edit mode. Then for an image taken with landscape mode, if user don't scale it manually within the UIImagePicker, there would have black stripe/background on the top and bottom of the image. Is there a way to get rid of that and make that portion of the image to be transparent?

推荐答案

#pragma mark UIImagePickerControllerDelegate

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

    UIImage *img = nil;

    CGRect cropRect = [[info valueForKey:UIImagePickerControllerCropRect] CGRectValue];

    if (cropRect.origin.y < 0) {

        img = [info objectForKey:UIImagePickerControllerOriginalImage];

    } else {

        img = [info objectForKey:UIImagePickerControllerEditedImage];

    }

}

这篇关于使用UIImagePicker时如何摆脱从UIImagePickerControllerEditedImage返回的图像上的黑底的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！