Question

我希望像在iOS Powerpoint中一样在iOS Swift中为文本添加动画效果。这是我在Swift中尝试做的事情的链接：

http://www.ellenfinkelstein.com/pptblog/text-animation-techniques/

（我正在看的是他们在网站上的例3中的打字机效果）

我似乎找不到如何做到这一点的方法。

感谢任何帮助：）

编辑： 目前我正在使用一种天真的方法并逐一淡化它们。但它是对我的信号

ViewController.swift：

import UIKit

class ViewController: UIViewController {

@IBOutlet weak var hash1: UILabel!
@IBOutlet weak var i: UILabel!
@IBOutlet weak var n: UILabel!
@IBOutlet weak var c: UILabel!
@IBOutlet weak var l: UILabel!
@IBOutlet weak var u: UILabel!
@IBOutlet weak var d: UILabel!
@IBOutlet weak var e: UILabel!
@IBOutlet weak var leftarrow: UILabel!
@IBOutlet weak var s: UILabel!
@IBOutlet weak var t: UILabel!
@IBOutlet weak var d1: UILabel!
@IBOutlet weak var i1: UILabel!
@IBOutlet weak var o: UILabel!
@IBOutlet weak var dot: UILabel!
@IBOutlet weak var h: UILabel!
@IBOutlet weak var rightarrow: UILabel!
override func viewDidLoad() {
    super.viewDidLoad()
    self.hash1.alpha = 0
    self.i.alpha = 0
    self.n.alpha = 0
    self.c.alpha = 0
    self.l.alpha = 0
    self.u.alpha = 0
    self.d.alpha = 0
    self.e.alpha = 0
    self.leftarrow.alpha = 0
    self.s.alpha = 0
    self.t.alpha = 0
    self.d1.alpha = 0
    self.i1.alpha = 0
    self.o.alpha = 0
    self.dot.alpha = 0
    self.h.alpha = 0
    self.rightarrow.alpha = 0

}

override func viewDidAppear(animated: Bool) {
    super.viewDidAppear(animated)
    UIView.animateWithDuration(0.1, animations: { () -> Void in self.hash1.alpha = 1.0})
    UIView.animateWithDuration(0.2, animations: { () -> Void in self.i.alpha = 1.0})
    UIView.animateWithDuration(0.3, animations: { () -> Void in self.n.alpha = 1.0})
    UIView.animateWithDuration(0.4, animations: { () -> Void in self.c.alpha = 1.0})
    UIView.animateWithDuration(0.5, animations: { () -> Void in self.l.alpha = 1.0})
    UIView.animateWithDuration(0.6, animations: { () -> Void in self.u.alpha = 1.0})
    UIView.animateWithDuration(0.7, animations: { () -> Void in self.d.alpha = 1.0})
    UIView.animateWithDuration(0.8, animations: { () -> Void in self.e.alpha = 1.0})
    UIView.animateWithDuration(0.9, animations: { () -> Void in self.leftarrow.alpha = 1.0})
    UIView.animateWithDuration(1.0, animations: { () -> Void in self.s.alpha = 1.0})
    UIView.animateWithDuration(1.1, animations: { () -> Void in self.t.alpha = 1.0})
    UIView.animateWithDuration(1.2, animations: { () -> Void in self.d1.alpha = 1.0})
    UIView.animateWithDuration(1.3, animations: { () -> Void in self.i.alpha = 1.0})
    UIView.animateWithDuration(1.4, animations: { () -> Void in self.o.alpha = 1.0})
    UIView.animateWithDuration(1.5, animations: { () -> Void in self.dot.alpha = 1.0})
    UIView.animateWithDuration(1.6, animations: { () -> Void in self.h.alpha = 1.0})
    UIView.animateWithDuration(1.7, animations: { () -> Void in self.rightarrow.alpha = 1.0})

}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

}

我觉得必须采用更好的方法（甚至是工作方式）来解决这个问题。

Answer 1

一种天真的方式就是简单地设置重复计时器。让计时器从零开始递增Int实例变量。

使用Int值获取邮件的子字符串并将其安装在标签中。当索引达到消息的全长时，终止计时器（或者如果希望文本消失并再次开始绘制，则将Int变量重置为零。）

在Swift中键入动画

1 个答案: