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我的希望是成功保存屏幕截圖,但直到現在,我的代碼保存了兩次屏幕,我不知道爲什麼。保存截圖兩次而不是一次的錯誤
我有以下幾點:
class finalPostal: UIViewController{
var gesture = UILongPressGestureRecognizer()
override func viewWillAppear(animated: Bool) {
gesture = UILongPressGestureRecognizer(target: self, action: "screenShotMethod")
gesture.minimumPressDuration = 1.5
view.addGestureRecognizer(gesture)
}
func screenShotMethod() {
let layer = UIApplication.sharedApplication().keyWindow!.layer
let scale = UIScreen.mainScreen().scale
UIGraphicsBeginImageContextWithOptions(layer.frame.size, false, scale);
layer.renderInContext(UIGraphicsGetCurrentContext()!)
let screenshot = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
UIImageWriteToSavedPhotosAlbum(screenshot, nil, nil, nil)
let alertSaved = UIAlertController(title: "Caputra guardada", message: "", preferredStyle: .ActionSheet)
alertSaved.addAction(UIAlertAction(title: "Ok", style: .Default, handler: {action in
self.view.removeGestureRecognizer(self.gesture)
}))
presentViewController(alertSaved, animated: true, completion: nil)
}
請修復您的公司的格式de –
你需要多長時間?它可能會根據新聞的持續時間多次調用 – 2015-12-14 17:33:19
在代碼上放置一個斷點以查看該方法是否被命中兩次。如果是,使用bool變量來避免多次匹配 –