Json总结

Json格式

基本格式

变量名:值

"title":"肖申克的救赎"

值可以是结构体（类），如下，用大括号括起来：

"images":
{"small":"http://img3.douban.com/view/movie_poster_cover/ipst/public/p480747492.jpg",
"large":"http://img3.douban.com/view/movie_poster_cover/lpst/public/p480747492.jpg",
"medium":"http://img3.douban.com/view/movie_poster_cover/spst/public/p480747492.jpg"},

值可以是数组，如下，用中括号括起来：

"genres":["犯罪","剧情"],

数组可以由结构体（类）构成：

"casts":[
{"avatars":{"small":"http://img3.douban.com/img/celebrity/small/17525.jpg","large":"http://img3.douban.com/img/celebrity/large/17525.jpg","medium":"http://img3.douban.com/img/celebrity/medium/17525.jpg"},
"alt":"http://movie.douban.com/celebrity/1054521/“,”id":"1054521",
"name":"蒂姆·罗宾斯"},

{"avatars":{"small":"http://img3.douban.com/img/celebrity/small/34642.jpg","large":"http://img3.douban.com/img/celebrity/large/34642.jpg","medium":"http://img3.douban.com/img/celebrity/medium/34642.jpg"},
"alt":"http://movie.douban.com/celebrity/1054534/",
"id":"1054534",
"name":"摩根·弗里曼”},

{“avatars":{"small":"http://img5.douban.com/img/celebrity/sL;POL,mall/5837.jpg","large":"http://img5.douban.com/img/celebrity/large/5837.jpg","medium":"http://img5.douban.com/img/celebrity/medium/5837.jpg"},
"alt":"http://movie.douban.com/celebrity/1041179/",
"id":"1041179",
"name":"鲍勃·冈顿"}],

举例

http://api.douban.com/v2/movie/top250

{"rating":{"max":10,"average":9.6,"stars":"50","min":0},
"genres":["犯罪","剧情"],
"collect_count":783892,

"casts":[
{"avatars":{"small":"http://img3.douban.com/img/celebrity/small/17525.jpg","large":"http://img3.douban.com/img/celebrity/large/17525.jpg","medium":"http://img3.douban.com/img/celebrity/medium/17525.jpg"},
"alt":"http://movie.douban.com/celebrity/1054521/“,”id":"1054521",
"name":"蒂姆·罗宾斯"},

{"avatars":{"small":"http://img3.douban.com/img/celebrity/small/34642.jpg","large":"http://img3.douban.com/img/celebrity/large/34642.jpg","medium":"http://img3.douban.com/img/celebrity/medium/34642.jpg"},
"alt":"http://movie.douban.com/celebrity/1054534/",
"id":"1054534",
"name":"摩根·弗里曼”},

{“avatars":{"small":"http://img5.douban.com/img/celebrity/sL;POL,mall/5837.jpg","large":"http://img5.douban.com/img/celebrity/large/5837.jpg","medium":"http://img5.douban.com/img/celebrity/medium/5837.jpg"},
"alt":"http://movie.douban.com/celebrity/1041179/",
"id":"1041179",
"name":"鲍勃·冈顿"}],


"title":"肖申克的救赎",
"original_title":"The Shawshank Redemption",
"subtype":"movie",
"directors":

[{"avatars":
{"small":"http://img3.douban.com/img/celebrity/small/230.jpg","large":"http://img3.douban.com/img/celebrity/large/230.jpg","medium":"http://img3.douban.com/img/celebrity/medium/230.jpg"},
"alt":"http://movie.douban.com/celebrity/1047973/",
"id":"1047973",
"name":"弗兰克·德拉邦特"}],

"year":"1994",
"images":
{"small":"http://img3.douban.com/view/movie_poster_cover/ipst/public/p480747492.jpg",
"large":"http://img3.douban.com/view/movie_poster_cover/lpst/public/p480747492.jpg",
"medium":"http://img3.douban.com/view/movie_poster_cover/spst/public/p480747492.jpg"},

"alt":"http://movie.douban.com/subject/1292052/",
"id":"1292052"},

NSJSONSerialization——IOS5自带

JSONObjectWithData创建json对象

#pragma mark - ASIHTTPRequestDelegate
- (void)requestFinished:(ASIHTTPRequest *)request
{
    NSError *error;
    NSDictionary *jsonDict = [NSJSONSerialization JSONObjectWithData:request.responseData options:kNilOptions error:&error];
    NSArray *movieArray = [jsonDict objectForKey:@"subjects"];
    
//    NSDictionary *jsonDict = [request.responseString  JSONValue];
//    NSArray *movieArray = jsonDict[@"subjects"];

    for (NSDictionary *dict  in movieArray)
    {
        SYMovieModel *model = [[SYMovieModel alloc] init];
        model.movieName = dict[@"title"];
        model.movieYear = dict[@"year"];
        model.movieImage = dict[@"images"][@"large"];
        
        [_saveDataArray addObject:model];
    }
    //刷新表
    [_tableView reloadData];
}

获取webView中的json

- (void)webViewDidFinishLoad:(UIWebView *)webView{
    NSString *jsonStr = [self.webView stringByEvaluatingJavaScriptFromString:@"document.body.innerHTML"];
    NSString *cmd = [NSString stringWithFormat:@"eval(%@).userId", jsonStr];
    NSString *str = [self.webView stringByEvaluatingJavaScriptFromString:cmd];
    
    cmd = [NSString stringWithFormat:@"eval(%@).result", jsonStr];
    str = [self.webView stringByEvaluatingJavaScriptFromString:cmd];

    if ([str isEqualToString:@"Success"]){
        NSLog(@"Success");
        [self dismissViewControllerAnimated:NO completion:^{}];
    }
}

其他方法

 

http://blog.csdn.net/enuola/article/details/7903632/