UIScrollView提供了以页面为单位滚动显示各个子页面内容的功能,每次手指滑动后会滚动一屏的内容。
要实现该功能,需要如下操作:
1,将UIScrollView的pagingEnabled属性设置成true
2,必须通过contentSize属性设置各个页面相加的宽度。比如iphone手机一屏宽度是320,如果有3个页面,则contentSize就需要设置为320*3=960
3,最好将showsHorizontalScrollIndicator和showsVerticalScrollIndicator设置成false隐藏横向和纵向滚动条。
4,如果scrollsToTop不需要也设置成false。
--- 主页面 ---
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 | class ViewController : UIViewController {
let numOfPages = 3
let pageWidth = 320
let pageHeight = 360
override func viewDidLoad(){
super .viewDidLoad()
var scrollView = UIScrollView ()
scrollView.frame = self .view.bounds
scrollView.contenSize= CGSizeMake ( CGFloat (pageWidth*numOfPages), CGFloat (pageHeight))
scrollView.pagingEnabled = true
scrollView.showsHorizontalScrollIndicator = false
scrollView.showsVerticalScrollIndicator = false
scrollView.scrollsToTop = false
for i in 0..numOfPages{
var myViewController = MyViewController (number:(i+1))
myViewController.view.frame = CGRectMake ( CGFloat (pageWidth*i),
CGFloat (0), CGFloat (pageWidth), CGFloat (pageHeight))
scrollView.addSubview(myViewController.view)
}
self .view.addSubview(scrollView)
}
}
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--- 子页面 ---
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 | class MyViewController : UIViewController {
var number: Int !
let colorMap=[
1: UIColor .blackColor(),
2: UIColor .orangeColor(),
3: UIColor .blueColor()
]
init (number initNumber: Int ){
self .number = initNumer
super . init (nibNmae: nil , bundle: nil )
}
override func viewDidLoad(){
var numberLabel = UILabel (frame: CGRectMake (0,0,100,100))
numberLabel.center = self .view.center
numberLabel.text = "第\(number)页"
numberLabel.textColor = UIColor .whiteColor()
self .view.addSubview(numberLabel)
self .view.backgroundColor = colorMap[number]
}
}
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