问题描述
- 等待AFJSONRequestOperation完成
-
使用AFNetworking获取网站的一些JSON信息,如何从asynchronou请求返回得到响应?- (id) descargarEncuestasParaCliente:(NSString *)id_client{ NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:[NSString stringWithFormat:@"http://whatever.com/api/&id_cliente=%@", id_client]]]; __block id RESPONSE; AFJSONRequestOperation *operation = [AFJSONRequestOperation JSONRequestOperationWithRequest:request success:^(NSURLRequest *request, NSHTTPURLResponse *response, id JSON) { RESPONSE = JSON; } failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error, id JSON) { NSLog(@"ERROR: %@", error); }]; [operation start]; return RESPONSE; }
解决方案
因为是异步执行的关系,显然你这样返回肯定不能及时得到结果。
你可以将你的方法使用block改造一下
- (void) descargarEncuestasParaCliente:(NSString *)id_client block:(void(^)(id json))processResult{
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:[NSString stringWithFormat:@"http://whatever.com/api/&id_cliente=%@", id_client]]];
AFJSONRequestOperation *operation = [AFJSONRequestOperation JSONRequestOperationWithRequest:request success:^(NSURLRequest *request, NSHTTPURLResponse *response, id JSON) {
processResult(JSON); ///回调处理返回的json结果
} failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error, id JSON) {
NSLog(@"ERROR: %@", error);
}];
[operation start];
}
调用:
[self descargarEncuestasParaCliente:@"1" block:^(id json) {
NSLog(@"return result is :%@",json);
}
时间: 2024-07-31 10:00:45