如果我使用以下代码,它会显示错误
“键入’HttpConnection’不符合协议’NSObjectProtocol’”
原文链接：/swift/318803.html“键入’HttpConnection’不符合协议’NSObjectProtocol’”
class HttpConnection : NSURLConnectionDataDelegate {
var urlConnection : NSURLConnection?
weak var delegate : HttpConnecting?
init(delegate:HttpConnecting){
self.delegate = delegate;
}
func startAsynRequestWithUrlString(url:NSString,withMethod:NSString){
}
}
如果我将HttpConnection子类化为NSObject,那么它工作正常.所以我的问题是当我需要采用NSURLConnectionDataDelegate协议在swift为什么我需要从NSObject继承类？
