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這讓我瘋狂。僅在第一次運行時，viewDidLayoutSubviews被調用兩次。爲什麼viewDidLayoutSubviews僅在第一次運行時被調用兩次？
這裏是我使用的代碼：
class CICViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
}
func addQLabel(qLabel: UILabel, questionString: String, bgrLabel: UILabel) {// some code goes here
}
func makeRoundQButtons(qButtons:[UIButton]) {
// some code goes here
}
func addArrows(numberOfArrows:Int, buttonCurAngle:Double) {//some code goes here
}
func animateButtons(qButtons:[UIButton], buttonCurAngle:Double) {
// some code goes here
}
override func viewDidAppear(animated: Bool) {
super.viewDidAppear(animated)
}
func backTapped(sender: UIBarButtonItem) {
navigationController?.popViewControllerAnimated(false)
//some code goes here
}
func restartTapped(sender: UIBarButtonItem) {
navigationController?.popToRootViewControllerAnimated(false)
//some code goes here
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
}
在我的ViewController我稱之爲：
class OneViewController: CICViewController {
override func viewDidLoad() {
super.viewDidLoad()
//some code goes here
}
override func viewDidLayoutSubviews() {
super.viewDidLayoutSubviews()
print("viewDidLayoutSubviews")
self.makeRoundQButtons(qButtons)
self.animateButtons(qButtons, buttonCurAngle: 2.0)
}
override func viewDidAppear(animated: Bool) {
//nothing goes here
}
}