美文网首页
2017-12-25 本次项目更新总结

2017-12-25 本次项目更新总结

作者: 烟雨平生花飞舞 | 来源:发表于2017-12-25 11:26 被阅读0次

    1、增加了阅读协议并给协议截屏,然后上传到服务端,一下为滚动协议的截屏功能代码:

    - (void)screenShotWithScrollView:(UIScrollView *)scrollView

    {

    UIImage* image;

    UIGraphicsBeginImageContextWithOptions(scrollView.contentSize, NO, 1);

    {

    CGPoint savedContentOffset = scrollView.contentOffset;

    CGRect savedFrame = scrollView.frame;

    scrollView.contentOffset = CGPointZero;

    scrollView.frame = CGRectMake(0, 0, scrollView.contentSize.width, scrollView.contentSize.height);

    [scrollView.layer renderInContext: UIGraphicsGetCurrentContext()];

    image = UIGraphicsGetImageFromCurrentImageContext();

    scrollView.contentOffset = savedContentOffset;

    scrollView.frame = savedFrame;

    }

    UIGraphicsEndImageContext();

    NSData *data = UIImageJPEGRepresentation(image, 1);

    [data writeToFile:[self getPathWithDocument:@"protocol" fileName:@"protocol.jpg"] atomically:NO];

    }

    在webView加载数据完成后:

    - (void)webViewDidFinishLoad:(UIWebView *)webView

    {

    // js获取高度

    CGFloat scrollHeight = [[webView stringByEvaluatingJavaScriptFromString: @"document.body.scrollHeight"] floatValue];

    if (!webView.isLoading) {

    NSString *readyState = [webView stringByEvaluatingJavaScriptFromString:@"document.readyState"];

    BOOL complete = [readyState isEqualToString:@"complete"];

    if (complete) {

    //此处是判断webView数据加载完成后的一些操作,有时候它已经加载完但是数据并没有显示出来,这个方法可以判断加载完并且数据全部显示完毕。

    }

    }

    }

    2、图片签名:

    用到了别人写的一个类:PJRSignatureView。它有一个变量incrImage,需要声明为公有属性,用来在外部判断改签名是否为空。

    然后是获得某个范围内的屏幕图像

    - (UIImage *)imageFromView:(UIView *)theView atFrame:(CGRect)r

    {

    UIGraphicsBeginImageContext(CGSizeMake(theView.width, _signatureView.bottom));

    CGContextRef context = UIGraphicsGetCurrentContext();

    CGContextSaveGState(context);

    UIRectClip(r);

    [theView.layer renderInContext:context];

    UIImage *theImage = UIGraphicsGetImageFromCurrentImageContext();

    UIGraphicsEndImageContext();

    return  theImage;

    }

    最后是图片的合成,把协议截取的图片与签名合成一张图片:

    - (void)combine:(UIImage *)topImage bottomImage:(UIImage *)bottomImg imageSacle:(CGFloat)scale

    {

    CGFloat height = topImage.size.height + bottomImg.size.height;

    CGSize offScreenSize = CGSizeMake(kScreenWidth, height);

    UIGraphicsBeginImageContextWithOptions(offScreenSize, YES, scale);

    CGRect rect = CGRectMake(0, 0, kScreenWidth, topImage.size.height);

    [topImage drawInRect:rect];

    rect.origin.y+=topImage.size.height;

    CGRect rect1 = CGRectMake(0, rect.origin.y, kScreenWidth, bottomImg.size.height);

    [bottomImg drawInRect:rect1];

    UIImage *imagez = UIGraphicsGetImageFromCurrentImageContext();

    UIGraphicsEndImageContext();

    NSData *data = UIImageJPEGRepresentation(imagez, 1);

    [data writeToFile:[self getPathWithDocument:@"protocol" fileName:@"protocolSignature.jpg"] atomically:YES];

    self.imagePath = [self getPathWithDocument:@"protocol" fileName:@"protocolSignature.jpg"];

    }

    3、在图片上传的时候需要用到AFN的含有AFMultipartFormData类的post请求。

    如果崩溃的话在这个地方加个判断:

    //把image 转为data , POST上传只能传data

    if (data != nil) {

    //上传的参数(上传图片,以文件流的格式)

    [formData appendPartWithFileData:data name:@"file" fileName:imgPath mimeType:@"image/jpg"];

    }

    保存本地的图片最好用jpg,因为png有些大。清晰度可以根据参数scale来调整。在上传图片时有一点需要注意:

    if ([imgPath containOfString:@"http"]) {

    imgPath = [imgPath stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet URLFragmentAllowedCharacterSet]];

            NSURL *newStr2Url = [NSURL URLWithString:imgPath];

            //转成data,让data读取这个地址上的内容并将其转成data数据

            data = [NSData dataWithContentsOfURL:newStr2Url];

    }else{

    data = [NSData dataWithContentsOfFile:imgPath];

    }

    这里是需要区分本地路径和网络图片路径的。当时就因为这个晕了一会儿。

    (最后才发现,这个没必要)

    此次更新新的功能就这么多。记录一下。

    参考:http://blog.csdn.net/kiwirr/article/details/50433897

    相关文章

      网友评论

          本文标题:2017-12-25 本次项目更新总结

          本文链接:https://www.haomeiwen.com/subject/mpakgxtx.html