Swift学习第二练——Swift项目时光电影
很早以前的一个OC的练习项目,用swift重新写了一遍,因为xcode版本的更新对swift的兼容度也在不断改变,此版本适用于xcode6.1。
这个项目中,用swift将iOS官方SDK中的HTTP进行了封装,使用了swift编写的异步加载网络图片的方法。练习了用swift操作界面布局,跳转界面等的方法。
下面是封装的下载类的核心代码:
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| private var httpConnection:NSURLConnection? class ZYHHttpRequset: NSObject,NSURLConnectionDataDelegate{ var requestUrl:String? var downloadData:NSMutableData=NSMutableData() var isDownloadSuccess:Bool? var delegate:ZYHHttpRequestDelegate? class func requestFormUrl(url:NSString)->ZYHHttpRequset{ var oldRequest:ZYHHttpRequset?=ZYHHttpRequestManager.sharedHttpRequestManager().requestForKey(url) if (oldRequest != nil){ println("该任务存在") return oldRequest! } //新建下载任务 var request:ZYHHttpRequset=ZYHHttpRequset() request.requestUrl=url request.startRequestUrl(url) ZYHHttpRequestManager.sharedHttpRequestManager().addTask(request, key: url) return request } func stop(){ if httpConnection != nil { httpConnection?.cancel() httpConnection = nil } } //开始下载请求 private func startRequestUrl(url:NSString){ if httpConnection != nil { httpConnection!.cancel() httpConnection==nil } //创建连接对象 var request=NSURLRequest(URL: NSURL(string: url)!) httpConnection=NSURLConnection(request: request, delegate: self) } //重写协议中的方法 func connection(connection: NSURLConnection, didReceiveResponse response: NSURLResponse) { downloadData.length=0 } func connection(connection: NSURLConnection, didReceiveData data: NSData) { downloadData.appendData(data) } func connectionDidFinishLoading(connection: NSURLConnection) { isDownloadSuccess = true delegate!.ZYHHttpRequestSuccsee(self) ZYHHttpRequestManager.sharedHttpRequestManager().removeTaskFromUrl(self.requestUrl!) } func connection(connection: NSURLConnection, didFailWithError error: NSError) { println("加载失败") println(error) self.isDownloadSuccess=false ZYHHttpRequestManager.sharedHttpRequestManager().removeTaskFromUrl(self.requestUrl!) } } protocol ZYHHttpRequestDelegate{ func ZYHHttpRequestSuccsee(request:ZYHHttpRequset) }
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项目部分截图:
github源码地址:https://github.com/ZYHshao/SwiftMovie
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