我有一个应用程序允许用户自拍并上传到Facebook，但我创建的selfieTapped按钮不起作用。它会弹出一个黑屏。它不允许用户从他们的库中选择照片，也不允许用户拍照。
import UIKit
import Social
class ViewController: UIViewController, UINavigationControllerDelegate, UIImagePickerControllerDelegate {
@IBOutlet weak var myImageView: UIImageView!
@IBAction func selfieTapped(sender: AnyObject) {
//this method will be called when the user has taken a photo or has selected a photo from the photo library
func imagePickerController(picker: UIImagePickerController!, didFinishPickingImage image: UIImage!, editingInfo: NSDictionary!) {
//takes the image parameter and displays it inside myImageView
myImageView.image = image
//hides the imagePicker and animates the transition
self.dismissViewControllerAnimated(true, completion: nil)
}
//creates a new UIImagePickerController and sets it to the imagePicker variable
let imagePicker = UIImagePickerController()
//self the imagePicker's delegate property to the current view controller
imagePicker.delegate = self
//sets the imagePicker's sourceType property to .Camera
if UIImagePickerController.isSourceTypeAvailable(.Camera) {
//checking if a front camera is available
imagePicker.sourceType = .Camera
//if so, set it to the front camera
if (UIImagePickerController.isCameraDeviceAvailable(.Front)) {
//setting it to the front camera
imagePicker.cameraDevice = .Front
} else {
//setting it to the rear camera if the front is not available
imagePicker.cameraDevice = .Rear
}
} else {
//if the camera is not available, the photo library will be shown
imagePicker.sourceType = .PhotoLibrary
}
//presents the imagePicker modally, sliding it up from the bottom of the screen and it animates the transition
self.presentViewController(imagePicker, animated: true, completion: nil)
}
@IBAction func shareTapped(sender: AnyObject) {
//sets the serviceType property to Facebook
let facebookSocial = SLComposeViewController(forServiceType: SLServiceTypeFacebook)
//myImageView image is added to the Facebook post
facebookSocial.addImage(myImageView.image)
//it is displayed and uses animation
self.presentViewController(facebookSocial, animated: true, completion: nil)
}
}
最佳答案
请检查您是否已在Camera中关闭您的应用程序的Photos&Setting权限。