objective-c - Objective-C "Bad URL"错误

Question

我正在尝试从我的 Objective C 代码中设置对某个 URL 的 Http GET 请求。无论我做什么，或者使用哪个 URL，我都会收到以下错误:

Connection Failed: Error Domain=NSURLErrorDomain 
Code=-1000 "bad URL" UserInfo=0x755c440 
{NSUnderlyingError=0x7561950 "bad URL", NSLocalizedDescription=bad URL}

我是 iOS 开发新手，所以我不确定我这样做是否正确。我遵循了苹果文档并在各种论坛中寻找答案，即使这样我也收到了这个错误。

这是我的代码:

NSString *url = [NSString stringWithFormat: @"http://example.com/api/%@/%@", str1, str2];

NSString *encodedUrl = [url stringByAddingPercentEscapesUsingEncoding: NSUTF8StringEncoding];

NSLog(@"URL - %@", encodedUrl);              // Checking the url

NSMutableURLRequest *theRequest= [[NSMutableURLRequest alloc] init];

[theRequest setHTTPMethod:@"GET"];


[NSMutableURLRequest requestWithURL:[NSURL URLWithString:encodedUrl]
                                          cachePolicy:NSURLRequestUseProtocolCachePolicy
                                      timeoutInterval:10.0];

NSURLConnection *theConnection=[[NSURLConnection alloc] initWithRequest:theRequest delegate:self startImmediately:YES];

非常欢迎任何建议。

Answer 1

您没有初始化您的theRequest。 如果您不将其返回值分配给变量，则该行不会执行任何操作。

[NSMutableURLRequest requestWithURL:[NSURL URLWithString:encodedUrl]
                                          cachePolicy:NSURLRequestUseProtocolCachePolicy
                                      timeoutInterval:10.0];

这是您应该使用的代码:

NSString *url = [NSString stringWithFormat: @"http://example.com/api/%@/%@", str1, str2];

NSString *encodedUrl = [url stringByAddingPercentEscapesUsingEncoding: NSUTF8StringEncoding];

NSLog(@"URL - %@", encodedUrl);              // Checking the url

NSMutableURLRequest *theRequest= [NSMutableURLRequest requestWithURL:[NSURL URLWithString:encodedUrl]
                                                           cachePolicy:NSURLRequestUseProtocolCachePolicy
                                                       timeoutInterval:10.0];

NSURLConnection *theConnection=[[NSURLConnection alloc] initWithRequest:theRequest delegate:self startImmediately:YES];