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如下的資料是關于ios對圖像進行壓縮的內容。
{
CGSize imageSize = image.size;
CGFloat width = imageSize.width;
CGFloat height = imageSize.height;
if (width <= newSize.width && height <= newSize.height){
return image;
}
if (width == 0 || height == 0){
return image;
}
CGFloat widthFactor = newSize.width / width;
CGFloat heightFactor = newSize.height / height;
CGFloat scaleFactor = (widthFactor<heightFactor?widthFactor:heightFactor);
CGSize targetSize = CGSizeMake(scaledWidth,scaledHeight);
UIGraphicsBeginImageContext(targetSize);
[image drawInRect:CGRectMake(0,0,scaledWidth,scaledHeight)];
UIGraphicsEndImageContext();
return newImage;
}
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