Objective-C Rest Response

Question

我正在使用PHP編寫的Web服務檢查我的iPhone應用程序發送的HTTP請求，然後PHP腳本返回yes或no取決於憑據是否正確，目前我是硬編碼他們，但他們似乎並沒有按預期運行，即使PHP腳本返回yes，條件失敗，我試圖將結果更改爲硬編碼的字符串，並且這工作...

Here是代碼

用PHP編寫的

NSString *varyingString1 = @"username="; 
    NSString *varyingString2 = @"username"; 


    NSString *varyingString3 = @"&password="; 
    NSString *varyingString4 = @"password"; 
    NSString *post = [NSString stringWithFormat: @"%@%@%@%@", varyingString1, varyingString2, varyingString3, varyingString4]; 

    NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES]; 

    NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init]; 
    [request setURL:[NSURL URLWithString:@"http://url.com/api/login.php"]]; 
    [request setHTTPMethod:@"POST"]; 
    [request setHTTPBody:postData]; 
    NSData *returnData = [NSURLConnection sendSynchronousRequest: request returningResponse: nil error: nil]; 
    NSString *strResult = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding]; 

    NSString *result = strResult; 
    result = [post stringByReplacingOccurrencesOfString:@" " withString:@""]; 

    if(result == @"yes"){ 
     NSLog(@"%@",strResult); 
     [self performSegueWithIdentifier:@"picker" sender:self]; 
    }else{ 
     NSLog(@"No"); 
    } 

我的Web服務，然後看起來像這樣

<?php if($_POST['password'] == 'password' && $_POST['username'] == 'username') echo "yes"; 
else echo "no"; 

任何想法？

Answer 1

result == @"yes"不比較兩個字符串。

要比較您的字符串使用[result isEqualToString:@"yes"]

Answer 2

爲REST服務的優先辦理，通過HTTP響應代碼 爲exampel迴應，如果用戶在返回200 OK記錄，

如果證書未能返回401未經授權 那麼你就可以得到響應的身體和處理它

<?php 
    if($_POST['password'] == 'password' && $_POST['username'] == 'username') 
    { 
    header('HTTP/1.0 200 OK'); 
    } else { 
    header('HTTP/1.0 401 Unauthorized'); 
    }