一图简单了解URLSession，所有的网络请求任务都是由URLSession创建并挂起
思路图晚点补上，先上代码
下载管理器代码
class DownLoadManager:NSObject{
static let instance: DownLoadManager = DownLoadManager()
/// 单例
///
/// -Returns: 返回对象本身
class func sharedManager() ->DownLoadManager{
return instance
}
/// 存储下载任务
lazy var downLoadCache:Dictionary = {
let dic =Dictionary()
return dic
}()
/// 根据URL下载任务
///
/// - Parameters:
/// - url: 链接
/// - progress: 进度
/// - compelete: 完成回调
/// - faile: 失败回调
func downLoadFile(withUrl url:String,progress:@escaping(_progress:Float)->Void,compelete:@escaping(_filePath:String)->Void,faile:@escaping(_error:String)->Void) ->Void{
let downLoadHepler =downLoadCache[url]
if downLoadHepler !=nil {
debugPrint("此任务下载中。。。")
}else{
let downLoadHepler =DownLoaderHepler()
downLoadCache[url] = downLoadHepler
downLoadHepler.downLoadFile(withUrl: url, progress: progress, compelete: { (filePath) in
self.downLoadCache.removeValue(forKey: url)
compelete(filePath)
}, faile: faile)
}
}
/// 暂停
///
/// -Parameterurl: 链接
func pasume(withUrl url:String) ->Void{
let downLoadHepler =downLoadCache[url]
if downLoadHepler !=nil {
downLoadHepler?.pasume()
}else{
debugPrint("此任务不存在\(url)")
}
}
/// 继续
///
/// -Parameterurl: 继续链接
func resume(withUrl url:String) ->Void{
let downLoadHepler =downLoadCache[url]
if downLoadHepler !=nil{
downLoadHepler?.resume()
}else{
debugPrint("此任务不存在\(url)")
}
}
}
DownLoadManager下载代码
class DownLoadManager:NSObject{
static let instance: DownLoadManager = DownLoadManager()
/// 单例
///
/// -Returns: 返回对象本身
class funcsharedManager() ->DownLoadManager{
return instance
}
/// 存储下载任务
lazy var downLoadCache:Dictionary = {
let dic =Dictionary()
return dic
}()
/// 根据URL下载任务
///
/// - Parameters:
/// - url: 链接
/// - progress: 进度
/// - compelete: 完成回调
/// - faile: 失败回调
func downLoadFile(withUrl url:String,progress:@escaping(_progress:Float)->Void,compelete:@escaping(_filePath:String)->Void,faile:@escaping(_error:String)->Void) ->Void{
let downLoadHepler =downLoadCache[url]
if downLoadHepler !=nil{
debugPrint("此任务下载中。。。")
}else{
let downLoadHepler =DownLoaderHepler()
downLoadCache[url] = downLoadHepler
downLoadHepler.downLoadFile(withUrl: url, progress: progress, compelete: { (filePath)in
self.downLoadCache.removeValue(forKey: url)
compelete(filePath)
}, faile: faile)
}
}
/// 暂停
///
/// -Parameterurl: 链接
func pasume(withUrl url:String) ->Void{
let downLoadHepler =downLoadCache[url]
if downLoadHepler !=nil{
downLoadHepler?.pasume()
}else{
debugPrint("此任务不存在\(url)")
}
}
/// 继续
///
/// -Parameterurl: 继续链接
func resume(withUrl url:String) ->Void{
let downLoadHepler =downLoadCache[url]
if downLoadHepler !=nil{
downLoadHepler?.resume()
}else{
debugPrint("此任务不存在\(url)")
}
}
}
