我正在尝试调整最大1000px宽度的图像,但原始图像分辨率的“比率”需要保持不变。即1000x1300或1000x1600等
我需要对下面的代码进行哪些更改?
- (void)setImageAndConvertToThumb:(UIImage *)image {
//image
UIImage *sizedImg = [image scaleWithMaxSize:CGSizeMake(1000, 1000) quality:kCGInterpolationHigh];
NSData *data = UIImagePNGRepresentation(sizedImg);
self.image = data;
}
答案 0 :(得分:0)
宽高比只是宽度除以高度(反之亦然),所以只需使用与原始图像相同的比例计算新高度,如下所示:
- (void)setImageAndConvertToThumb:(UIImage *)image {
//image
CGFloat newWidth = 1000;
CGFloat newHeight = newWidth * image.size.height / image.size.width;
UIImage *sizedImg = [image scaleWithMaxSize:CGSizeMake(newWidth, newHeight) quality:kCGInterpolationHigh];
NSData *data = UIImagePNGRepresentation(sizedImg);
self.image = data;
}