我创建了一个登录页面,该页面使用Restkit RKClient
发送登录详细信息,并获取JSON数据(用户或错误)。我希望能够在没有对象映射的情况下解析JSON数据,只需要JSON到字典。原因是这只是一个发送用户名和密码的简单登录,如果我设置对象映射,我必须将登录详细信息设置到登录对象中,然后设置路由等……这似乎有点冗长。
这是我的代码
- (IBAction)login:(id)sender
{
[self.activityIndicator startAnimating];
NSMutableDictionary* params = [NSMutableDictionary dictionaryWithObject:self.username.text forKey:@"username"];
[params setObject:self.password.text forKey:@"password"];
[params setObject:@"login" forKey:@"type"];
[[RKClient sharedClient] post:@"/login" params:params delegate:self];
}
- (void)request:(RKRequest*)request didLoadResponse:(RKResponse*)response {
if ([request isPOST]) {
if ([response isJSON]) {
NSLog(@"Got a JSON response back from our POST: %@", response.bodyAsString);
}
}
[self.activityIndicator stopAnimating];
}
如何将JSON数据获取到可读对象?感谢
您可以简单地对RKResponse对象调用parsedBody:nil,并将返回的对象分配给NSDictionary:
responseDict = [response parsedBody:nil];
作为一项额外的检查,我使用了一种方便的方法来检查是否有成功的响应:
- (bool) wasRequestSuccessfulWithResponse:(RKResponse*)response {
bool isSuccessfulResponse = NO;
id parsedResponse;
NSDictionary *responseDict;
if(response != nil) {
parsedResponse = [response parsedBody:nil];
if ([parsedResponse isKindOfClass:[NSDictionary class]]) {
responseDict = [response parsedBody:nil];
if([[responseDict objectForKey:@"success"] boolValue]) {
isSuccessfulResponse = YES;
}
}
}
return isSuccessfulResponse;
}
在iOS 5.1+中有NSJSONSerialization。
下面是一个使用RestKit 0.2和NSJSONSerialization:的示例
[[RKObjectManager sharedManager] getObjectsAtPath:kLoginURL
parameters:params
success:^(RKObjectRequestOperation *operation, RKMappingResult *mappingResult) {
NSError *error;
NSDictionary* json = [NSJSONSerialization JSONObjectWithData:operation.HTTPRequestOperation.responseData options:NSJSONReadingMutableLeaves error:&error];
NSLog(@"msg: %@", [json objectForKey:@"msg"]);
}
failure:^(RKObjectRequestOperation *operation, NSError *error) {
}];
您可以使用像JSONKit这样的开源库。它能够将JSON响应解析为NSDictionary或NSArray。