IOS 压缩图片大小

-(UIImage *)getImageSizeTo:(UIImage *)image

{

//如果图片太小就不需要压缩

if (image.size.width <= 500 || image.size.height <= 500) {

return image;

}

//压缩照片

float kCompressionQuality = 0.3;

NSData *photo = UIImageJPEGRepresentation(image, kCompressionQuality);

return [UIImage imageWithData:photo];

}