网络请求

    //一个异步的get请求

    NSString * loginString = @"http://118.144.86.100/51miu/webserver/soap/user.php?userName=张三&passWord=123456";
    NSString *fullPathEncodingString = [loginString stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
    NSURL * loginURL = [NSURL URLWithString:fullPathEncodingString];
    ASIHTTPRequest * loginRequest = [ASIHTTPRequest requestWithURL:loginURL];
    loginRequest.delegate = self;
    [loginRequest setDidFinishSelector:@selector(loginFinished:)];
    [loginRequest setDidFailSelector:@selector(loginFailed:)];
    [loginRequest startAsynchronous];

总是对网络请求感到很神奇，尽管项目里用到的soap请求到了网络，但是对于 异步的get和post以及 同步的get,post有什么区别？ 

get和post有什么区别貌似是面试经常考的东西

NSString *fullPathEncodingString = [loginString stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]; 为什么加这个 是因为 get的参数里有中文的 必须加这个才能发送到服务端