#removeFromSuperview

[jacob-cs]

Swift Animations: Awesome Facebook Pop Up! Press and Hold (Ep 1)

my review point is /10

https://youtu.be/wbmTy32s7GQ?t=6m13s   remove status bar

https://youtu.be/wbmTy32s7GQ?t=7m20s   long press gesture recognizer를 설치 

https://youtu.be/wbmTy32s7GQ?t=10m40s   stack view를 통해 여러개의 버튼을 담을 콘테이너 만들기

https://youtu.be/wbmTy32s7GQ?t=12m55s   상황에 따라 ui view를 더하거나 제거하는 방법 (removeFromSuperview, addSubview)

https://youtu.be/wbmTy32s7GQ?t=13m41s   터치가 이루어진 위치를 찾고 그 위치에 ui view를 첨가했다가 사라지게 하는 작업

https://youtu.be/wbmTy32s7GQ?t=18m37s   실제 ui view의 애니메이션 제작 작업

[arthurknopper]

Volume View iOS Tutorial

When using audio in your app sometimes you want the user to change the volume. With the help of the MPVolumeView object you create a builtin Volume control which also has the abilty  to redirect the output to an airplay device. In this tutorial we will play a sound and display the volume controls.This tutorial is made with Xcode 9 and built for iOS 11.

Open Xcode and create a new Single View App.

For product name, use IOS11VolumeViewTutorial and then fill out the Organization Name and Organization Identifier with your customary values. Enter Swift as Language and choose Next.

Some audio is needed to play, so download the music file and add it to the project, make sure "Copy items if needed" is selected

Go to the Storyboard and drag two Buttons to the main view. Set the title of the left button to Play. Select the Button and select the Auto Layout pin button. Pin the Button to the top and left and click "Add 2 Constraints".

Set the title of the right button to Stop. Select the Button and select the Auto Layout pin button. Pin the Button to the top and right and click "Add 2 Constraints".

The Storyboard should look like this.

Select the Assistant Editor and make sure the ViewController.swift is visible. Ctrl and drag from the Play Button to the ViewController class and create the following Action

Ctrl and drag from the Stop Button to the ViewController class and create the following Action

The AVFoundation framework is needed for playing the music file and the MediaPlayer framework to use the MPVolumeView. Go to the ViewController.swift file and import the frameworks

import AVFoundation import MediaPlayer

Inside the ViewController class add the following properties

var audioPlayer = AVAudioPlayer() let wrapperView = UIView(frame: CGRect(x: 30, y: 200, width: 300, height: 20))

Implement the viewDidLoad method

override func viewDidLoad() { super.viewDidLoad() // 1 let path = Bundle.main.path(forResource: "Amorphis - My Enemy", ofType: "mp3") let music = NSURL(fileURLWithPath: path!) as URL // 2 do { try AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayback) try AVAudioSession.sharedInstance().setActive(true) try audioPlayer = AVAudioPlayer(contentsOf: music) audioPlayer.prepareToPlay() } catch { print("error") } }

The audio file is extracted from the Application's bundle

The audio session category is set to playback and set to active.

Implement the playSound method

   @IBAction func playSound(_ sender: Any) { // 1 audioPlayer.play() // 2 view.backgroundColor = UIColor.clear view.addSubview(wrapperView) // 3 let volumeView = MPVolumeView(frame: wrapperView.bounds) wrapperView.addSubview(volumeView) }

The audio file starts to play

The wrapper view is added as a subview to the main view

The MPVolumeView is added as a subview of the wrapper view.

Implement the stopSound method.

@IBAction func stopSound(_ sender: Any) { audioPlayer.stop() wrapperView.removeFromSuperview() }

The audio is stopped and the wrapperView including the volume view is removed from the superview.

Build and Run the project, select the play button and change the volume and Output source. Note this can only be run on an actual device, since in the iOS Simulator you will only see a black view.

You can download the source code of the IOS11VolumeViewTutorialat the ioscreator repository on Github.

[ioscodesnippet]

Adding fadeout effect to any -[UIViews removeFromSuperview]

Typically you like to do something like below when you wanted to remove a view from its parent view.

[myView removeFromSuperview];

Sometimes it's not that please for a user to see an UI component disappearing suddenly. You'd then consider adding some transition effects, and here's a little code snippet in the UIView+JTRemoveAnimated category for how you can get a fade out effect on view removal. So from now on, you just needed to do this to fade out any UIViews

[myView removeFromSuperviewAnimated]