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：
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)
}
项目部分截图：
