func setOverlayTitle() {
self.overlayLogo!.text = "Welcome"
var hello: [String] = ["Bon Jour", "GUTEN\nMORGEN", "BONJOUR", "HOLA", "안녕하세요", "BUENOS DÍAS", "BUONGIORNO", "早安", "おはよう", "गुड मॉर्निंग"]
for (var i = 1; i < hello.count-1; i++) {
UIView.animateWithDuration(1.0, delay: 2.0, options: UIViewAnimationOptions.CurveEaseOut, animations: {
self.overlayLogo!.alpha = 0.0
}, completion: {
(finished: Bool) -> Void in
println(i)
self.overlayLogo!.text = hello[i]
// Fade in
UIView.animateWithDuration(1.0, delay: 0.0, options: UIViewAnimationOptions.CurveEaseIn, animations: {
self.overlayLogo!.alpha = 1.0
}, completion: nil)
})
}
}
我有以下代码,我正在尝试迭代数组“hello”,同时以2秒的延迟淡入/淡出标签。但是这段代码不起作用! 目前它只打印9,9次,并且只打印/退出一次
答案 0 :(得分:2)
问题是由您在那里使用的for
循环引起的。您无法以这种方式获得所需的行为。在开始下一次迭代之前,for
循环不会等待标签动画完成。在每个动画周期完成后,您可以从方法本身进行递归调用。
您需要在类中声明一个变量并实现如下方法:
var iterator = 1;
override func viewDidLoad()
{
super.viewDidLoad()
self.lblAnime!.text = "Welcome"
setOverlayTitle()
}
func setOverlayTitle()
{
var hello: [String] = ["Bon Jour", "GUTEN\nMORGEN", "BONJOUR", "HOLA", "안녕하세요", "BUENOS DÍAS", "BUONGIORNO", "早安", "おはよう", "गुड मॉर्निंग"]
UIView.animateWithDuration(1.0, delay: 2.0, options: UIViewAnimationOptions.CurveEaseOut, animations:
{
self.lblAnime!.alpha = 0.0
},
completion:
{(finished: Bool) -> Void in
println(self.iterator)
self.lblAnime!.text = hello[self.iterator]
// Fade in
UIView.animateWithDuration(1.0, delay: 0.0, options: UIViewAnimationOptions.CurveEaseIn, animations:
{
self.lblAnime!.alpha = 1.0
},
completion:
{(finished: Bool) -> Void in
self.iterator++
if self.iterator < hello.count
{
self.setOverlayTitle();
}
})
})
}