图片压缩后长度和宽度 及像素坐标

图片压缩后长度和宽度 及像素坐标 CGFloat    scaleFloat = 0.6; + (UIImage *) scaleImage: (UIImage *)image scaleFactor:(float)scaleFloat {     CGSize size = CGSizeMake(image.size.width * scaleBy, image.size.height * scaleBy);     UIGraphicsBeginImageContext(size);     CGContextRef context = UIGraphicsGetCurrentContext();     CGAffineTransform transform = CGAffineTransformIdentity;     transform = CGAffineTransformScale(transform, scaleBy, scaleBy);     CGContextConcatCTM(context, transform);     // Draw the image into the transformed context and return the image     [image drawAtPoint:CGPointMake(0.0f, 0.0f)];     UIImage *newimg = UIGraphicsGetImageFromCurrentImageContext();     UIGraphicsEndImageContext();     return newimg;   } 然后imgData = UIImageJPEGRepresentation(image, 0.6f) imgData UIImageJPEGRepresentation(image, scaleFloat)

本文出自 “ZhuoKing” 博客，转载请与作者联系！