Question

UIImage *image = [UIImage imageNamed:@"anyImage.png"];

NSData *data = UIImageJPEGRepresentation(image, 0.032);

UIImage *newImage = [UIImage imageWithData:data];

我发现图像的尺寸缩小但我的问题是我只需要存储100kb的图像。在我的库中，我有8159064kb的图像，通过这种方法减少到141258kb。请告诉我一种方法，将图像大小减小到100kb，无论大小如何，它都会将其转换为100kb。提前致谢

Answer 1

你应该调整image.size的大小，这样可以将你的大图像减少到100k

您可以制作UIImage类别

喜欢UIImage(Resize)

+(UIImage*)imageWithImage:(UIImage*)image andWidth:(CGFloat)width andHeight:(CGFloat)height
{
    UIGraphicsBeginImageContext( CGSizeMake(width, height));
    [image drawInRect:CGRectMake(0,0,width,height)];
    UIImage* newImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();

    return newImage;
}

然后创建while循环以调整图像大小以适合＆lt; = 100KB

NSData *data = UIImagePNGRepresentation(_yourImage);
while (data.length / 1000 >= 100) {
    _yourImage = [UIImage imageWithImage:_yourImage andWidth:image.size.width/2 andHeight:image.size.height/2];
    data = UIImagePNGRepresentation(_yourImage);
}

// _yourImage is now reduce the size which is <= 100KB

缩小图像大小直到给定值ios

1 个答案: