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json -> object
- #definekGlobalQueuedispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT,0)
- #definekDoubanUrl@"http://douban.fm/j/mine/playlist?type=n&h=&channel=0&from=mainsite&r=4941e23d79"
- -(void)loadJsonData:(NSURL*)url
- {
- dispatch_async(kGlobalQueue,^{
- NSData*data=[NSDatadataWithContentsOfURL:url];
- [selfperformSelectorOnMainThread:@selector(parseJsonData:)withObject:datawaitUntilDone:NO];
- });
- }
- -(void)parseJsonData:(NSData*)data
- {
- NSError*error;
- NSDictionary*json=[NSJSONSerializationJSONObjectWithData:dataoptions:kNilOptionserror:&error];
- if(json==nil){
- NSLog(@"jsonparsefailedrn");
- return;
- NSArray*songArray=[jsonobjectForKey:@"song"];
- NSLog(@"songcollection:%@rn",songArray);
-
- _song=songArray;
- self.songIndex=0;
- NSDictionary*song=[songArrayobjectAtIndex:0];
- NSLog(@"songinfo:%@tn",song);
- }
object -> JSON
- NSDictionary*song=[NSDictionarydictionaryWithObjectsAndKeys:@"icanfly",@"title",@"4012",@"length",@"Tom",@"Singer",nil];
- if([NSJSONSerializationisValidJSONObject:song])
- {
- NSError*error;
- NSData*jsonData=[NSJSONSerializationdataWithJSONObject:songoptions:NSJSONWritingPrettyPrintederror:&error];
- NSString*json=[[NSStringalloc]initWithData:jsonDataencoding:NSUTF8StringEncoding];
- NSLog(@"jsondata:%@",json);
- }
（编辑：李大同）
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