2019-03-04 iOS 8/9 系统 使用WKWebview ,针对本地加载HTML代码问题(loadHTMLString:baseURL:)

编辑于 2019-03-04
iOS 8/9 系统 使用WKWebview ,针对本地加载HTML代码问题(loadHTMLString:baseURL:)
问题:加载本地图片
iOS 10以后 通过下面的代码可以解决加载本地图片

 NSString *path = [[NSBundle mainBundle] resourcePath];
NSURL *baseURL = [NSURL fileURLWithPath:path];
 [self.webView loadHTMLString:HtmlString baseURL:baseURL];

iOS 8/9 系统 :

NSURL *temDirURL = [[NSURL fileURLWithPath:NSTemporaryDirectory()] URLByAppendingPathComponent:@"www"];

[self.webView loadHTMLString:HtmlString baseURL:temDirURL];

iOS 8/9 系统需要将本地资源copy 一份到 沙盒下的tmp文件夹下:

//将图片资源copy 到 tmp 文件夹下
- (void)copyResourcesToTMPFolder{
    //js文件
    [self copyResourcesToTMPFolderWithFileName:@"jquery.min" fileType:@"js"];
  //png 文件
    [self copyResourcesToTMPFolderWithFileName:@"comment_icon" fileType:@"png"];
}
-(void)copyResourcesToTMPFolderWithFileName:(NSString*)fileName fileType:(NSString *)fileType{
    NSString *copyPath = [[NSBundle mainBundle] pathForResource:fileName ofType:fileType];
    [self copyFileWithPath:copyPath];
}
//复制文件到 tmp 文件夹下
- (void)copyFileWithPath:(NSString *)path{
    
    NSFileManager * fileManager= [NSFileManager defaultManager];
    //创建文件夹路径
    NSURL * temDirURL = [[NSURL fileURLWithPath:NSTemporaryDirectory()] URLByAppendingPathComponent:@"www"];
    //是否是文件夹
    BOOL isDir;
    BOOL isExit = [fileManager fileExistsAtPath:temDirURL.absoluteString isDirectory:&isDir];
    //文件夹是否存在
    if (!isExit || !isDir) {
        [fileManager createDirectoryAtURL:temDirURL withIntermediateDirectories:YES attributes:nil error:nil];
    }
    //     NSLog(@"temDirURL : %@",temDirURL.absoluteString);
    //判断数据库文件是否存在
    NSString * temDirURLpath = [temDirURL.absoluteString stringByReplacingOccurrencesOfString:@"file:///" withString:@"/"];
    //    NSLog(@"temDirURL : %@",temDirURLpath);
    NSString * filePath = [temDirURLpath stringByAppendingPathComponent:[[path componentsSeparatedByString:@"/"] lastObject]];
    //    NSLog(@"filePath : %@",filePath);
    //如果文件不存在，则复制
    if (![fileManager fileExistsAtPath:filePath]) {
        NSError * error = nil;
        BOOL isSuccess = [fileManager copyItemAtPath:path toPath:filePath error:&error];
        NSLog(@"文件%@", isSuccess ? @"拷贝成功" : @"拷贝失败");
        if(error){
            NSLog(@"%@",error.description);
        }
    }
}

另外,一些绝对地址,还需要替换

+ (NSString *)setingDefaultspPath:(NSString *)path{
    if (![CommonFunction isIOS10AndLater]) {
        NSURL * temDirURL = [[NSURL fileURLWithPath:NSTemporaryDirectory()] URLByAppendingPathComponent:@"www"];
        NSString * temDirURLpath = [temDirURL.absoluteString stringByReplacingOccurrencesOfString:@"file:///" withString:@"/"];
        return  [temDirURLpath stringByAppendingPathComponent:[[path componentsSeparatedByString:@"/"] lastObject]];
    }else{
        return path;
    }
}
//用法

        NSString *defaultpath = [[NSBundle mainBundle] resourcePath];
        defaultpath = [defaultpath stringByAppendingPathComponent:@"userweb_headImage_defaultImage.png"];
        defaultpath = [CommentHtmlManager setingDefaultspPath:defaultpath];//这里替换地址
        
          [commentList appendFormat:@"
",[CommentHtmlManager GetAvatarAddress:[NSString stringWithFormat:@"%ld",userid]],[CommentHtmlManager GetAvatarAddress:[NSString stringWithFormat:@"%ld",userid]],defaultpath,defaultpath,userid,[[nickname stringByReplacingOccurrencesOfString:@"%5c" withString:@"%5c%5c"] stringByReplacingOccurrencesOfString:@"%27" withString:@"%5c%27"]];
        
       

参考链接:
https://www.jianshu.com/p/868dee57a0ef
https://www.jianshu.com/p/1688c11af71c