图片缩放裁剪

- (UIImage*)resizeWebImage:(UIImage *)image

{ //图像缩放

CGSize newSize
= CGSizeMake(110,
image.size.height/image.size.width*110.0);

UIGraphicsBeginImageContext (newSize);

[image drawInRect : CGRectMake ( 0 , 0 ,newSize. width ,newSize.height )];

UIImage *
newImage = UIGraphicsGetImageFromCurrentImageContext ();

UIGraphicsEndImageContext ();

// // 图像截取上半部分

newImage = [UIImage imageWithCGImage:CGImageCreateWithImageInRect(newImage.CGImage, CGRectMake(0, 0, 110, 72.5))];

// UIImageWriteToSavedPhotosAlbum(newImage, nil, NULL, NULL);

return newImage;

}