我在我的應用程序中有一個攝像頭功能,當您拍攝圖片時,它將該圖片放入imageView。我有一個隱藏的按鈕,當圖像放置在imageView中時,我想要的是按鈕被隱藏。檢查imageView是否爲空
@IBOutlet weak var imageView: UIImageView!
@IBOutlet weak var toGoFurther: UIButton!
override func viewDidLoad() {
super.viewDidLoad()
toGoFurther.hidden = true
if (self.imageView.image != nil){
toGoFurther.hidden = false
}
let testObject = PFObject(className: "TestObject")
testObject["foo"] = "bar"
testObject.saveInBackgroundWithBlock { (success: Bool, error: NSError?) -> Void in
print("Object has been saved.")
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
@IBAction func continueNextPage(sender: AnyObject) {
}
@IBAction func takePhoto(sender: AnyObject) {
if !UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.Camera){
return
}
let imagePicker = UIImagePickerController()
imagePicker.delegate = self
imagePicker.sourceType = UIImagePickerControllerSourceType.Camera;
//Create camera overlay
let pickerFrame = CGRectMake(0, UIApplication.sharedApplication().statusBarFrame.size.height, imagePicker.view.bounds.width, imagePicker.view.bounds.height - imagePicker.navigationBar.bounds.size.height - imagePicker.toolbar.bounds.size.height)
let squareFrame = CGRectMake(pickerFrame.width/2 - 400/2, pickerFrame.height/2 - 400/2, 640, 640)
UIGraphicsBeginImageContext(pickerFrame.size)
let context = UIGraphicsGetCurrentContext()
CGContextSaveGState(context)
CGContextAddRect(context, CGContextGetClipBoundingBox(context))
CGContextMoveToPoint(context, squareFrame.origin.x, squareFrame.origin.y)
CGContextAddLineToPoint(context, squareFrame.origin.x + squareFrame.width, squareFrame.origin.y)
CGContextAddLineToPoint(context, squareFrame.origin.x + squareFrame.width, squareFrame.origin.y + squareFrame.size.height)
CGContextAddLineToPoint(context, squareFrame.origin.x, squareFrame.origin.y + squareFrame.size.height)
CGContextAddLineToPoint(context, squareFrame.origin.x, squareFrame.origin.y)
CGContextEOClip(context)
CGContextMoveToPoint(context, pickerFrame.origin.x, pickerFrame.origin.y)
CGContextSetRGBFillColor(context, 0, 0, 0, 1)
CGContextFillRect(context, pickerFrame)
CGContextRestoreGState(context)
let overlayImage = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext();
let overlayView = UIImageView(frame: pickerFrame)
overlayView.image = overlayImage
imagePicker.cameraOverlayView = overlayView
self.presentViewController(imagePicker, animated: true, completion: nil)
}
func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) {
imageView.image = info[UIImagePickerControllerOriginalImage] as? UIImage
dismissViewControllerAnimated(true, completion: nil)
}
如果我添加動畫:BOOL和動畫怒吼咆哮,給人錯誤.......不,我試圖只是如果else語句,並沒有更改....我也通過使用打印語句檢查,並沒有得到一個打印 – RubberDucky4444
嗯,你有錯誤將該代碼放在奇怪的類文件。有什麼錯誤? – mn1
我輸入了錯誤的內容。它現在的作品,非常感謝 – RubberDucky4444