CODEWITHSUNDEEP
iosiphonexcodeswiftavfoundation
Michael
Michael

Reputation: 591

Why don't I have to import Foundation before using NSBundle in Swift?

In my code below, I am using NSBundle. According to the documentation (https://developer.apple.com/library/mac/documentation/Cocoa/Reference/Foundation/Classes/NSBundle_Class/#//apple_ref/occ/clm/NSBundle/bundleWithURL:), you need to import Foundation to use NSBundle.

However, in my code below, I don't import Foundation but I am able to use NSBundle. Why is this?

I thought it might be because I import AVFoundation and AVFoundation inherits from NSObject; however, when I read the documentation, AVFoundation isn't listed as being inherited from NSObject. 

import UIKit
import AVFoundation

class PlaySoundsViewController: UIViewController {

var audioPlayer:AVAudioPlayer!

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view.
    if var filePath = NSBundle.mainBundle().pathForResource("movie_quote", ofType: "mp3") {
        var filePathUrl = NSURL.fileURLWithPath(filePath)
        audioPlayer = AVAudioPlayer(contentsOfURL: filePathUrl, error: nil)

    }else {
        println("the file path is empty")
    }
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

@IBAction func playSlowAudio(sender: UIButton) {
    audioPlayer.play()
    }
}

Upvotes: 0

Views: 1347

Answers (1)

dan
dan

Reputation: 9825

UIKit imports Foundation and you inherit anything the things you import publicly import.

Upvotes: 2

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