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我有一個顯示scrollView位置(移動)的函數。發射時,位置爲零,然後隨着移動而改變。當您回到第1頁時,位置爲0.我無法更改它,因此啓動號碼不爲零,因爲該項目將其捲動縮放以顯示頁面位置(不管它是否以0或1開頭,只要它不是零,並逐漸增加)預先感謝您的任何幫助。變量在啓動時爲零,但我希望它變爲0 swift
var screenPage: Int?
var screenPos: Int?
var screenPlaceFinal: Int!
func walkthroughDidScroll(position: CGFloat, offset: CGFloat) {
// getting the page number from the scroll position. First page loads as nil so want it to be zero.
// position when it starts is nil but I want it to be 0
if let screenPage = screenPage {
screenPlaceFinal = Int(((position/view.bounds.size.width) + 1) - 1)
} else {
//show an alert ot something else
self.screenPlaceFinal = 0
}
謝謝。我是一個傻子。 – SashaZ