Question

如何初始化以下代码？

import Foundation

class RecordedAudio: NSObject{
    var filePathUrl: NSURL!
    var title: String!
}

Answer 1

像这样：

var myVariable = RecordedAudio()

但是，鉴于filePathUrl和title是隐式解包的选项（我不得不建议反对），您可能想要创建一个更好的初始化方法：

init(filePathUrl: NSURL, title: String) {
    self.filePathUrl = filePathUrl
    self.title = title
}

然后使用该初始化。

var myVariable = RecordedAudio(filePathUrl: someUrlVar, title: someStringVar)

Answer 2

在Recorded Audio Class中，添加初始化代码：

class RecordedAudio: NSObject{
    var filePathUrl: NSURL!
    var title: String!

    init(filePathUrl: NSURL, title: String) {
        self.filePathUrl = filePathUrl
        self.title = title
    }
}

然后，在你的audioRecorderDidFinishRecording方法中，在你正在进行录制的ViewController中，用这样的实时代码替换注释掉的代码：

    func audioRecorderDidFinishRecording(recorder: AVAudioRecorder!, successfully flag: Bool) {
        if(flag){
            // Save the recorded audio
            // prior to adding initialization:
//            recordedAudio = RecordedAudio()
//            recordedAudio.filePathUrl = recorder.url
//            recordedAudio.title = recorder.url.lastPathComponent

            // Using initialization
            recordedAudio = RecordedAudio(filePathUrl: recorder.url, title: recorder.url.lastPathComponent!)

            // move to next UI
            self.performSegueWithIdentifier("stopRecording", sender: recordedAudio)

        } else {
            // If recording not successful
            recordingUIEnabled()
        }
    }

在swift中初始化

2 个答案: