图像压缩代码,ObjC代码库,德仔网

代码语言

代码分类

【ObjC】图像压缩

作者:Dezai.CN / 发布于2013/8/20/ 481


	- (UIImage*)scaleFromImage:(UIImage*)image scaledToSize:(CGSize)newSize
	{
	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);
	
	CGFloat scaledWidth = width * scaleFactor;
	CGFloat scaledHeight = height * scaleFactor;
	CGSize targetSize = CGSizeMake(scaledWidth,scaledHeight);
	
	 UIGraphicsBeginImageContext(targetSize);
	 [image drawInRect:CGRectMake(0,0,scaledWidth,scaledHeight)];
	 UIImage* newImage = UIGraphicsGetImageFromCurrentImageContext();
	 UIGraphicsEndImageContext();
	 return newImage;
	}

评论列表

本站所提供的代码，版权归原作者所有，若有侵犯作者版权，请与我们联系，我们将立即删除或修改。谢谢!
本站所有代码发布及提供者。

试试其它关键字

　图像压缩　

同语言下

可能有用的

Dezai.CN贡献的其它代码(4037)