ios - 使用 NSURL 发出 GET 请求不起作用
<p><p>我正在尝试获取一个简单的 GET 请求来为我的 api 工作。但它似乎不起作用，我不知道为什么。</p>
<p>我的代码如下</p>
<h1>编辑，也尝试过 NSURLCredential 但这似乎也不起作用</h1>
<pre><code>- (void)viewDidLoad
{
;
// Do any additional setup after loading the view.
NSString *urlAsString = @"https://www.test.com/api/v1/user/logout/";
NSURL *url = ;
NSMutableURLRequest *urlRequest = ; ;
;
NSOperationQueue *queue = [ init];
[NSURLConnection sendAsynchronousRequest:urlRequest queue:queue completionHandler:^(NSURLResponse *response,NSData *data, NSError *error) {
if ( >0 && error == nil){
NSString *html = [ initWithData:data encoding:NSUTF8StringEncoding];
NSLog(@"HTML = %@", html); }
else if ( == 0 && error == nil){
NSLog(@"Nothing was downloaded."); }
else if (error != nil){
NSLog(@"Error happened = %@", error); }
}];
}
- (BOOL)connection:(NSURLConnection *)connection canAuthenticateAgainstProtectionSpace:(NSURLProtectionSpace *)protectionSpace {
return ;
}
- (void)connection:(NSURLConnection *)connection didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge {
forAuthenticationChallenge:challenge];
;
}
</code></pre>
<p>我的 API 输出 json。所以我应该得到一个 json 对象，上面写着</p>
<pre><code>success: False
reason: 'Already Logged out'
</code></pre>
<p>但它却给了我以下错误</p>
<pre><code>2013-03-07 16:24:44.038 test Error happened = Error Domain=NSURLErrorDomain Code=-1012 "The operation couldn’t be completed. (NSURLErrorDomain error -1012.)" UserInfo=0x715db20 {NSErrorFailingURLKey=https://www.test.com/api/v1/user/logout/, NSErrorFailingURLStringKey=https://www.test.com/api/v1/user/logout/, NSUnderlyingError=0x7181cb0 "The operation couldn’t be completed. (kCFErrorDomainCFNetwork error -1012.)"}
</code></pre>
<h1>方法二</h1>
<p>经过一番研究，我找到了另一种发送get请求的方法，这种方法似乎工作正常</p>
<pre><code>dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
dispatch_async(queue, ^{
NSError *error = nil;
NSURL *url = ;
NSString *json = [NSString stringWithContentsOfURL:url
encoding:NSASCIIStringEncoding
error:&error];
if(!error) {
NSData *jsonData = ;
NSDictionary *jsonDict = [NSJSONSerialization JSONObjectWithData:jsonData
options:kNilOptions
error:&error];
BOOL success = [ boolValue];
if (!success) {
NSString *reason = ;
NSLog(@"Cannot log out, as user %@", reason);
}
//NSLog(@"JSON: %@", jsonDict);
}else{
NSLog(@"\nJSON: %@ \n Error: %@", json, error);
}
});
</code></pre></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>问题的解决方案在于 API 本身。如果用户已经注销，API 应该发送 HTTPUnauthorized 信号。既然如此，iOS 就会显示所有这些异常。当我放弃它并只是发回一个简单的 json 响应时，一切都得到了修复。</p></p>
<p style="font-size: 20px;">关于ios - 使用 NSURL 发出 GET 请求不起作用，我们在Stack Overflow上找到一个类似的问题：
<a href="https://stackoverflow.com/questions/15280479/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/15280479/
</a>
</p>
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