微信分享之因分享图片太大无法起调微信客户端

来源：互联网发布：wp8.1软件编辑：程序博客网时间：2024/04/30 13:18

微信分享时调用微信客户端有时会出现无法起调的问题，可能的原因是分享出去的图片大小超出了微信要求（要求不大于32KB）对于这个问题可以先压缩图片在分享上传。

微信分享集成指南：

https://open.weixin.qq.com/cgi-bin/showdocument?action=dir_list&t=resource/res_list&verify=1&id=open1419317332&token=&lang=zh_CN

2.图片压缩并转换成data

+ (NSData *)reSizeImageData:(UIImage *)sourceImage maxImageSize:(CGFloat)maxImageSize maxFileSizeWithKB:(CGFloat)maxFileSize{        if (maxFileSize <= 0.0)  maxFileSize = 1024.0;    if (maxImageSize <= 0.0) maxImageSize = 1024.0;        //先调整分辨率    CGSize newSize = CGSizeMake(sourceImage.size.width, sourceImage.size.height);        CGFloat tempHeight = newSize.height / maxImageSize;    CGFloat tempWidth = newSize.width / maxImageSize;        if (tempWidth > 1.0 && tempWidth > tempHeight) {        newSize = CGSizeMake(sourceImage.size.width / tempWidth, sourceImage.size.height / tempWidth);    }    else if (tempHeight > 1.0 && tempWidth < tempHeight){        newSize = CGSizeMake(sourceImage.size.width / tempHeight, sourceImage.size.height / tempHeight);    }        UIGraphicsBeginImageContext(newSize);    [sourceImage drawInRect:CGRectMake(0,0,newSize.width,newSize.height)];    UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();    UIGraphicsEndImageContext();        //调整大小    NSData *imageData = UIImageJPEGRepresentation(newImage,1.0);    CGFloat sizeOriginKB = imageData.length / 1024.0;        CGFloat resizeRate = 0.9;    while (sizeOriginKB > maxFileSize && resizeRate > 0.1) {        imageData = UIImageJPEGRepresentation(newImage,resizeRate);        sizeOriginKB = imageData.length / 1024.0;        resizeRate -= 0.1;    }        return imageData;}

// 把图片大小压缩到32KB以下就可以了

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