【问题标题】:How to add a button to access photo gallery to keyboard in swift?如何快速添加按钮以访问照片库到键盘?
【发布时间】:2019-09-29 13:09:15
【问题描述】:
【问题讨论】:
标签:
ios
swift
keyboard
gallery
【解决方案1】:
您可以通过编辑 NSLayoutConstraint 常量在键盘上方创建自己的视图。这是一个示例故事板。
storyboard and constraints
然后:
- 将您的 NSLayoutConstraint 连接到视图控制器
@IBOutlet weak var overKeyboardViewBottomConstraint: NSLayoutConstraint!
-
在 viewDidLoad 方法中添加键盘监听器:
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow), name: UIResponder.keyboardWillShowNotification, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillHide), name: UIResponder.keyboardWillHideNotification, object: nil)
-
为键盘创建选择器
@objc func keyboardWillShow(notification: Notification) {
if let keyboardSize = (notification.userInfo?[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue {
UIView.animate(withDuration: 0.5) { [unowned self, keyboardSize] in
self.overKeyboardViewBottomConstraint.constant = keyboardSize.height
self.view.layoutIfNeeded()
}
}
}
@objc func keyboardWillHide(notification: Notification) {
UIView.animate(withDuration: 0.5) { [unowned self] in
self.overKeyboardViewBottomConstraint.constant = 0
self.view.layoutIfNeeded()
}
}
-
然后是你的相机 IBAction
@IBAction func cameraAction(_ sender: Any) {
let photos = PHPhotoLibrary.authorizationStatus()
switch photos {
case .notDetermined:
print("not determined")
PHPhotoLibrary.requestAuthorization({status in
if status == .authorized{
self.showGallery()
} else {
print("access denied")
}
})
case .authorized:
print("authorized")
self.showGallery()
case .denied:
print("denied")
default:
break
}
}
-
你的画廊功能终于来了
func showGallery() {
if UIImagePickerController.isSourceTypeAvailable(.photoLibrary) {
let imagePicker = UIImagePickerController()
imagePicker.delegate = self
imagePicker.sourceType = .photoLibrary;
imagePicker.allowsEditing = true
self.present(imagePicker, animated: true, completion: nil)
}
}