Objective c NSURLConnection和对象委托
作为Objective-C的新手,我还不太了解委托的概念。我环顾四周,但我无法理解给出的答案,所以我用自己的话问这个问题 我使用以下四个功能实现了DownloadDelegate:Objective c NSURLConnection和对象委托,objective-c,delegates,nsurlconnection,nsdata,Objective C,Delegates,Nsurlconnection,Nsdata,作为Objective-C的新手,我还不太了解委托的概念。我环顾四周,但我无法理解给出的答案,所以我用自己的话问这个问题 我使用以下四个功能实现了DownloadDelegate: (void)连接:(NSURLConnection*)连接DidReceiverResponse:(NSURResponse*)响应{ (void)连接:(NSURLConnection*)连接didReceiveData:(NSData*)数据{ (无效)连接:(NSURLConnection*)连接失败错误:(
- (void)连接:(NSURLConnection*)连接DidReceiverResponse:(NSURResponse*)响应{
- (void)连接:(NSURLConnection*)连接didReceiveData:(NSData*)数据{
- (无效)连接:(NSURLConnection*)连接失败错误:(NSError*)错误{
- (无效)连接IDFinishLoading:(NSURLConnection*)连接{
感谢您的帮助!也许您对委托是什么有点困惑。在您的情况下,NSURLConnection使用委托(您将要声明的委托)发送有关上述重要事件的信息。实际委托可以是视图控制器或其他模型类的一部分,也可以在其自己的文件中,这无关紧要。要成为NSURLConnection的委托并实际接收回调,必须在@implementation声明中声明协议>
@implementation DownloadDelegate : NSObject <NSURLConnectionDelegate>
NSURLRequest *request = [[NSURLRequest alloc] initWithURL:[NSURL URLWithString:string]];
NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];//here is where you are declaring yourself as the delegate
[connection start];
希望这能有所帮助。是的,我确实对什么是代表感到困惑!谢谢你的回答