iPhone Objective-C:将方法组合在一起

发布于 2024-09-09 08:10:48 字数 1685 浏览 3 评论 0原文

我对 Objective-C 完全是个菜鸟,所以这对你们很多人来说可能是一个非常愚蠢的问题。

目前,我有一个带有“登录”按钮的视图,单击该按钮时会激活我在下面定义的 sigupUp IBAction。基本上,此方法需要进行 JSON 调用并获取有关用户的一些数据。

所以,现在,我的代码看起来像这样:

-(IBAction)signIn:(id)sender{

//run registration API call

//establish connection
NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
 NSString *postLength = [NSString stringWithFormat:@"%d",[postData length]];

NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init] autorelease]; 
[request setURL:[NSURL URLWithString:[NSString stringWithFormat:@"http://www.apicallhere.com/api/auth"]]];
[request setHTTPMethod:@"POST"];
[request setValue:postLength forHTTPHeaderField:@"Content-Length"];
 [request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Current-Type"];
[request setHTTPBody:postData];

[[NSURLConnection alloc]initWithRequest:request delegate:self];
responseData = [[NSMutableData data] retain];
}
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response{[responseData setLength:0];}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data{[responseData appendData:data];}
- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error{/*NSLog(@"%@",error);*/}

-(void)connectionDidFinishLoading:(NSURLConnection *)connection{
NSString *response=[[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding];
....code carries on from here.
}

如您所见,我的代码的问题在于,即使它是通过“SignUp”方法启动的,它也会以“connectionDidFinishLoading”方法结束。我想将所有这些代码放在一个方法中。不是两个单独的,因为我希望能够返回一个布尔值来验证连接是否成功。

如果有人能告诉我如何将此过程编码为单个方法,我将非常感激。

I'm a complete noob at objective-C, so this might be a very silly question to a lot of you.

Currently, I have a view with a 'SignIn' button, which when clicked, activates a sigupUp IBAction that I have defined below. Basically, this method needs to make a JSON call and get back some data about the user.

So, right now, my code looks something like this:

-(IBAction)signIn:(id)sender{

//run registration API call

//establish connection
NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
 NSString *postLength = [NSString stringWithFormat:@"%d",[postData length]];

NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init] autorelease]; 
[request setURL:[NSURL URLWithString:[NSString stringWithFormat:@"http://www.apicallhere.com/api/auth"]]];
[request setHTTPMethod:@"POST"];
[request setValue:postLength forHTTPHeaderField:@"Content-Length"];
 [request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Current-Type"];
[request setHTTPBody:postData];

[[NSURLConnection alloc]initWithRequest:request delegate:self];
responseData = [[NSMutableData data] retain];
}
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response{[responseData setLength:0];}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data{[responseData appendData:data];}
- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error{/*NSLog(@"%@",error);*/}

-(void)connectionDidFinishLoading:(NSURLConnection *)connection{
NSString *response=[[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding];
....code carries on from here.
}

As you can see, the problem with my code is that even though it is initiated via the 'SignUp' method, it finishes with the 'connectionDidFinishLoading' method. I want to have all this code in a single method. Not 2 separate ones, as I want to be able to return a boolean verifying if the connection was successful or not.

If someone could please tell me how to code up this procedure into a single method, I would really appreciate it.

如果你对这篇内容有疑问,欢迎到本站社区发帖提问 参与讨论,获取更多帮助,或者扫码二维码加入 Web 技术交流群。

扫码二维码加入Web技术交流群

发布评论

需要 登录 才能够评论, 你可以免费 注册 一个本站的账号。

评论(1

2024-09-16 08:10:48

如果您确实希望将代码全部包含在一个方法中,那么您可能会在同步 HTTP 请求方法和响应调用上阻塞所有 UI 等。

将所有这些都“内联”的方法是 NSURLConnection 上的 sendSynchronousRequest:returningResponse:error ,

[NSURLConnection sendSynchronousRequest:returningResponse:error:]

NSError *error;
NSURLResponse *response;
[NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
... do something with the NSURLResponse to enjoy with your data appropriately...

我个人鼓励您针对大多数此类事情寻找异步方法的替代方案。

If you really want the code all in one method, you're talking about potentially blocking all of the UI and so forth on a synchronous HTTP request method and response call.

The method to put this all "inline" is sendSynchronousRequest:returningResponse:error on NSURLConnection

[NSURLConnection sendSynchronousRequest:returningResponse:error:]

i.e.

NSError *error;
NSURLResponse *response;
[NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
... do something with the NSURLResponse to enjoy with your data appropriately...

I would personally encourage you to look at an alternative for most of this sort of thing towards the asynchronous methods.

~没有更多了~
我们使用 Cookies 和其他技术来定制您的体验包括您的登录状态等。通过阅读我们的 隐私政策 了解更多相关信息。 单击 接受 或继续使用网站,即表示您同意使用 Cookies 和您的相关数据。
原文