//MARK:WARNNING--如果视图里面存在唯一一个UIScrollView或其子类View，那么它会自动设置相应的内边距，有鬼😂，请关闭viewcontroller的automaticallyAdjustsScrollViewInsets属性automaticallyAdjustsScrollViewInsets
classLYSegementView:UIView{
varlineView =UIView(frame:CGRect(x:0, y:0, width:100, height:2))
varfontSize :CGFloat=15
privatevarscro =UIScrollView()
vartitles = [String]()
vartapCloser:((_item:Int)->Void)?
varlineColor =UIColor.orange
varlineHeight :CGFloat=2
varspaceColor =UIColor.darkGray
varspaceTopAndBottom:CGFloat=0
varspaceWidth :CGFloat=0//控件间隙
vartitleBgColor =UIColor.white
vartitleColor =UIColor.black
vartitleSelectColor =UIColor.orange//title选中颜色
varanimationTime =0.25//动画时间lineView移动动画时间
varselectIndex =0{//外部改变当前选中，超出不做反应
didSet{
ifselectIndex!= oldValue&&selectIndex
lineOutEffectAction(btns[selectIndex])
}
}
}
varcurrentSelect =0
privatevarbtns = [UIButton]()//all of the title Btn
// Stores the current view size to detect whether a redraw is needed in layoutSubviews
varcurrentViewSize =CGSize()
varlastSelect =UIButton()
init() {
super.init(frame:CGRect(x:0, y:0, width:0, height:0))
}
requiredinit?(coder aDecoder:NSCoder) {
super.init(coder: aDecoder)
}
overrideinit(frame:CGRect) {
super.init(frame: frame)
}
init(frame:CGRect,titles:[String]){
super.init(frame: frame)
self.titles= titles
}
init(frame:CGRect,titles:[String],block:@escaping((_item:Int) ->Void)){
super.init(frame: frame)
self.titles= titles
tapCloser= block
}
overridefunclayoutSubviews() {
super.layoutSubviews()
ifcurrentViewSize==self.frame.size{
return
}
currentViewSize=self.frame.size
commonInit(frame:self.frame, titles:titles, block:tapCloser)
}
funccommonInit(frame:CGRect,titles:[String],block:((_item:Int) ->Void)?){
scro.frame=self.bounds
//scro.showsVerticalScrollIndicator = false
//scro.showsHorizontalScrollIndicator = false
self.addSubview(scro)
lineView.backgroundColor=lineColor
lineView.frame.size.height=lineHeight
iftitles.count==0{
return
}
vartotalWidth:CGFloat=0//宽度
//let spaceWidth : CGFloat = 2
vartotalSize :CGFloat=0
//计算所有标题在15号字体下的宽度
forstrintitles{
totalWidth +=CGFloat(str.characters.count) *fontSize
totalSize +=CGFloat(str.characters.count)
}
totalWidth += (CGFloat(titles.count-1) *spaceWidth)
letsizeWidth = totalWidth >UIScreen.main.bounds.width? totalWidth :UIScreen.main.bounds.width
scro.contentSize=CGSize(width: sizeWidth, height: frame.height)
foriin0..
letstr = titles[i]
varitemWidth :CGFloat=0// CGFloat(str.characters.count) * fontSize
iftotalWidth >UIScreen.main.bounds.width{
itemWidth =CGFloat(str.characters.count) *fontSize
}else{
itemWidth = (UIScreen.main.bounds.width-spaceWidth*CGFloat(titles.count-1))/totalSize *CGFloat(str.characters.count)
}
letbtn =UIButton(type: .custom)
scro.addSubview(btn)
btn.titleLabel?.font=UIFont.systemFont(ofSize:fontSize)
btn.setTitle(str, for: .normal)
btn.frame=CGRect(x:CGFloat(i) * (itemWidth +spaceWidth), y:0, width: itemWidth, height: frame.height)
btn.setTitleColor(titleColor, for: .normal)
btn.setTitleColor(titleSelectColor, for: .selected)
btn.setTitleColor(titleColor, for: .highlighted)
btn.backgroundColor=titleBgColor
btn.addTarget(self, action:#selector(self.titleAction(_:)), for: .touchUpInside)
btn.tag= i
btns.append(btn)
ifi >0{
letspace =UIView(frame:CGRect(x:CGFloat(i)*itemWidth +spaceWidth*CGFloat(i -1), y:spaceTopAndBottom, width:spaceWidth, height: frame.height-spaceTopAndBottom*2))
space.backgroundColor=spaceColor
scro.addSubview(space)
}
ifi ==0{
lineView.frame.size.width= btn.frame.width
btn.isSelected=true
lastSelect= btn
}
}
lineView.frame.origin.y= frame.height-lineView.frame.height
scro.addSubview(lineView)
scro.contentOffset=CGPoint(x:0, y:0)
}
functitleAction(_sender:UIButton){
lastSelect.isSelected=false
sender.isSelected=true
lastSelect= sender
currentSelect= sender.tag
tapCloser?(sender.tag)
iflineView.frame.origin.x!= sender.frame.origin.x{
UIView.animate(withDuration:animationTime, animations: {
self.lineView.frame.origin.x= sender.frame.origin.x
self.lineView.frame.size.width= sender.frame.width
})
}
}
//外部改变selectIndex调用，仅做lineView移动动画处理
funclineOutEffectAction(_sender:UIButton){
lastSelect.isSelected=false
sender.isSelected=true
lastSelect= sender
currentSelect= sender.tag
iflineView.frame.origin.x!= sender.frame.origin.x{
UIView.animate(withDuration:animationTime, animations: {
self.lineView.frame.origin.x= sender.frame.origin.x
self.lineView.frame.size.width= sender.frame.width
})
}
}
}
网友评论