+ (NSData *)resetSizeOfImageData:(UIImage *)source_image maxSize:(NSInteger)maxSize{    //先调整分辨率    CGSize newSize = CGSizeMake(source_image.size.width, source_image.size.height);        CGFloat tempHeight = newSize.height / 1024;    CGFloat tempWidth = newSize.width / 1024;        if (tempWidth > 1.0 && tempWidth > tempHeight) {        newSize = CGSizeMake(source_image.size.width / tempWidth, source_image.size.height / tempWidth);    }    else if (tempHeight > 1.0 && tempWidth < tempHeight){        newSize = CGSizeMake(source_image.size.width / tempHeight, source_image.size.height / tempHeight);    }        UIGraphicsBeginImageContext(newSize);    [source_image drawInRect:CGRectMake(0,0,newSize.width,newSize.height)];    UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();    UIGraphicsEndImageContext();        //调整大小    NSData * imageData = http://www.mamicode.com/UIImageJPEGRepresentation(newImage,1.0);    NSUInteger sizeOrigin = [imageData length];    NSUInteger sizeOriginKB = sizeOrigin / 1024;        if (sizeOriginKB > maxSize) {                NSUInteger testKB = sizeOriginKB;        UIImage * testIamge = newImage;                if (testKB > 4000) {            imageData = UIImageJPEGRepresentation(newImage,0.10);            testKB = [imageData length] / 1024;            testIamge = [UIImage imageWithData:imageData];        }        if (testKB > 3000) {            imageData = UIImageJPEGRepresentation(testIamge,0.20);            testKB = [imageData length] / 1024;            testIamge = [UIImage imageWithData:imageData];        }        if (testKB > 2000) {            imageData = UIImageJPEGRepresentation(testIamge,0.30);            testKB = [imageData length] / 1024;            testIamge = [UIImage imageWithData:imageData];        }        if (testKB > 1000) {            imageData = UIImageJPEGRepresentation(testIamge,0.40);            testKB = [imageData length] / 1024;            testIamge = [UIImage imageWithData:imageData];        }        if (testKB > 500) {            imageData = UIImageJPEGRepresentation(testIamge,0.50);            testKB = [imageData length] / 1024;            testIamge = [UIImage imageWithData:imageData];        }        if (testKB > 300) {            imageData = UIImageJPEGRepresentation(testIamge,0.50);            testKB = [imageData length] / 1024;            testIamge = [UIImage imageWithData:imageData];        }        if (testKB > maxSize) {            imageData = UIImageJPEGRepresentation(testIamge,0.30);            testKB = [imageData length] / 1024;            testIamge = [UIImage imageWithData:imageData];        }        return imageData;    }        return imageData;}