无需其他类库
1: - (IBAction)callapi:(id)sender {
2:NSURL *url=[NSURL URLWithString:@"http://..."];
3:NSURLRequest *request=[NSURLRequest requestWithURL:url];
4:[NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {
5: //json
6: NSDictionary *r=[NSJSONSerialization JSONObjectWithData:data options:0 error:NULL];
7: int cnt=[r count];
8: NSLog(@"%d",cnt);
9: [self resultlbl].text=[NSString stringWithFormat:@"%d",cnt];
10:
11: //string
12: //NSString *str=[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
13: //NSLog(str);
14: //[self resultlbl].text=r[0][0];
15:}];
16: }
post
1: - (IBAction)postsend:(id)sender {
2:NSURL *url = [NSURL URLWithString:@"http://...."];
3:NSMutableURLRequest *rq = [NSMutableURLRequest requestWithURL:url];
4:[rq setHTTPMethod:@"POST"];
5:
6:NSData *jsonData = [@"{ \"参数名\": 数值,\"参数名\":\"字符\"... }" dataUsingEncoding:NSUTF8StringEncoding];
7:[rq setHTTPBody:jsonData];
8:
9:[rq setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
10:[rq setValue:[NSString stringWithFormat:@"%ld", (long)[jsonData length]] forHTTPHeaderField:@"Content-Length"];
11:
12:[NSURLConnection sendAsynchronousRequest:rq queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {
13: //code
14: NSString *str=[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
15: NSLog(str);
16:}];
17:
18: }
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