iOS Swift4.0 音频的剪辑,裁剪
2018-01-22 本文已影响9人
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Swift 4.0 音频编辑
- 废话不多说直接上代码
1.创建工程导入AVFoundation头文件//必须的
import UIKit
import AVFoundation
2.开始干活
override func viewDidLoad() {
super.viewDidLoad()
//裁剪音频
seeMuisc()
// Do any additional setup after loading the view, typically from a nib.
}
func seeMuisc() {
//找到本地文件所在的目录地址
let filePathFive = Bundle.main .path(forResource: "five", ofType: "mp3")
//开始裁剪
audioCrop(url: NSURL.fileURL(withPath: filePathFive!) as NSURL, startTime: CMTime.init(value: 0, timescale: 1), endTime: CMTime.init(value: 88, timescale: 1))
}
func audioCrop(url:NSURL ,startTime:CMTime ,endTime:CMTime) {
//拼接输出地址
let outPath = composeDir() + "fiveM.m4a"
//输出地址
let audioFileOutput = URL.init(fileURLWithPath: outPath)
do {
//如果有与该文件同名的删除
try FileManager.default.removeItem(at: audioFileOutput)
} catch {
}
//取出本地的数据
let asset = AVAsset(url: url as URL)
//开始裁剪
let exportSession = AVAssetExportSession.init(asset: asset, presetName: AVAssetExportPresetAppleM4A)
let exportTimeRange = CMTimeRangeMake(startTime, endTime)
exportSession?.outputFileType = AVFileType.m4a
exportSession?.outputURL = audioFileOutput
exportSession?.timeRange = exportTimeRange
exportSession?.exportAsynchronously(completionHandler: {
if AVAssetExportSessionStatus.completed == exportSession?.status {
print("\(outPath)")
}else if AVAssetExportSessionStatus.failed == exportSession?.status {
print("\(String(describing: exportSession?.error?.localizedDescription))")
}
})
}
func composeDir() -> (String) {
//获取本地存储的地址
let cacheDir = NSSearchPathForDirectoriesInDomains(FileManager.SearchPathDirectory.cachesDirectory, FileManager.SearchPathDomainMask.userDomainMask, true)
let fileManage = FileManager.default
let composeDir = cacheDir[0] + "/MMMMM/"
let existed = fileManage.fileExists(atPath: composeDir)
if existed == false {
do {
try fileManage.createDirectory(atPath: composeDir, withIntermediateDirectories: true, attributes: nil)
}catch{
}
}
return composeDir
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
