用到的第三方库:
Alamofire 用于网络请求和视频下载
MobilePlayer 用于播放在线视频
创建Movie类:
import Foundation
import Alamofire
class Movie {
private var url: NSURL //网络路径 如果本地路径存在则是本地路径
init (url: NSURL) {
self.url = url
}
//获取播放路径
func getUrl() -> NSURL {
if isExist() {
let url = NSURL(fileURLWithPath: getFilePath())
return url
}
return self.url
}
//通知下载 如果已经存在 不下载
func postDownload() {
if isExist() {
return
}
let destination = Alamofire.Request.suggestedDownloadDestination()
Alamofire.download(.GET, url, destination: destination).response { _, _, _, error in
if let error = error {
print("Failed with error: \(error)")
} else {
print("Downloaded file successfully")
}
}
}
//是否已经下载
private func isExist() -> Bool{
let fileManager = NSFileManager.defaultManager()
let filePath = getFilePath()
print(filePath)
let exist = fileManager.fileExistsAtPath(filePath)
return exist
}
//通过文件名称 获取文件路径
private func getFilePath() -> String {
let filePath = NSHomeDirectory() + "/Documents/" + getFileName()
return filePath
}
//通过url 获取文件名称
private func getFileName() -> String {
let array = self.url.URLString.componentsSeparatedByString("/")
return array.last!
}
}
创建Movie对象:
let string = "视频路径"
let url = NSURL(string: string)!
let movie = Movie(url: url)
movie.postDownload() //下载
play(movie)//播放
播放方法:
import MobilePlayer
func play(movie: Movie) {
let url = movie.getUrl()
let playerVC = MobilePlayerViewController(contentURL: url)
playerVC.activityItems = [url]
presentMoviePlayerViewControllerAnimated(playerVC)
}
一边播放一遍下载，下载成功后会播放本地路径的视频。
清除所有缓存:
//清除所有缓存
func cleanAllCache() {
let fileManager = NSFileManager.defaultManager()
let myDirectory = NSHomeDirectory() + "/Documents"
let fileArray:[AnyObject]? = fileManager.subpathsAtPath(myDirectory)
for fn in fileArray!{
try! fileManager.removeItemAtPath(myDirectory + "/\(fn)")
}
}
这里是用的是Alamofire设置的下载路径，注意删除的路径要和下载的路径一致。
//获取所有缓存大小
func getAllCacheSize() -> String {
let fileManager = NSFileManager.defaultManager()
let myDirectory = NSHomeDirectory() + "/Documents"
let fileArray:[AnyObject]? = fileManager.subpathsAtPath(myDirectory)
var allSize = 0.0
for fn in fileArray!{
let attr = try! fileManager.attributesOfItemAtPath(myDirectory + "/\(fn)")
let size = (attr["NSFileSize"] as! Double) / 1000000 //单位为 M
allSize += size
}
return String(format: "%.1f", allSize) //保留小数点后一位
}
