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@IBAction func OnRightSwipeGesture(sender: UIPanGestureRecognizer) {
let translated = sender.translationInView(self.view);
let diffTrans = (translated.y - previouslyTranslated.y)/75;
sum += diffTrans;
print(sum);
colorWheel.transform = CGAffineTransformMakeRotation(sum);
previouslyTranslated = translated;
}
在此函數中,我在每次調用它後都會添加翻譯差異。在我將手指從設備上拿開然後嘗試做出一個新手勢之後,總和重置爲0.總結聲明在班級的頂部,我非常困惑...一旦姿態結束,實例變量重置爲零
爲什麼不ü登錄總和變量在函數的結束,也與案件'uigesturestatebegan',添加交換機的情況下'uigesturestateended' –
什麼是有你'diffTrans'?如果你第二次得到負值,那麼它可以設置'sum'爲0. – Abhinav
我認爲你的duffTrans返回0,因爲它返回的整數不是浮點數。將其定義爲let diffTrans =(translated.y - previouslyTranslated.y)/ 75.0; –