swift 标签
import UIKit
public protocol YPLabelsItemView:UIView{
/// 最大的宽
func labelItemWidth(with data:Any) -> CGFloat
}
public protocol YPLabelsViewDelegate : AnyObject{
/// 选中某个标签回调
func labelsView(didSelectAt index: Int,with itemView:YPLabelsItemView, data:Any)
}
public class YPLabelsView<V:YPLabelsItemView>: YPBaseView {
/// 每一个item的高度
let itemHight : CGFloat
/// 最多展示几行
public var numberOfLines : Int = 0{
didSet{
resetSubItemsFrame()
}
}
/// 间距
public let spacing : CGFloat
/// 行间距
public let rowSpacing : CGFloat
/// 数据源
public private(set) var data : [Any] = []
/// 代理
public weak var delegate : YPLabelsViewDelegate?
/// 内容高度
public var contentHeight : CGFloat{
for view in subviews.reversed() {
if !view.isHidden {
return view.wp.maxY
}
}
return 0
}
/// 初始化标签视图
/// - Parameters:
/// - itemHeight: item高度
/// - spacing: 列间距
/// - rowSpacing: 行间距
public init(itemHeight: CGFloat,
spacing:CGFloat = 10,
rowSpacing:CGFloat = 10) {
self.itemHight = itemHeight
self.spacing = spacing
self.rowSpacing = rowSpacing
super.init(frame: .zero)
isUserInteractionEnabled = true
}
required init?(coder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
/// 设置数据源
/// - Parameter data: 数据类型
public func set(data:[Any]){
self.data = data
subviews.forEach { elmt in
elmt.removeFromSuperview()
}
for index in 0..<data.count {
let elmt = data[index]
let subView = V.init(frame: .zero)
let tap = UITapGestureRecognizer()
subView.addGestureRecognizer(tap)
tap.rx.event.subscribe(onNext: {[weak self] _ in
self?.delegate?.labelsView(didSelectAt: index, with: subView, data: elmt)
}).disposed(by: subView.wp.disposeBag)
subView.isUserInteractionEnabled = true
subView.frame = .init(x: 0, y: 0, width: subView.labelItemWidth(with: elmt), height: itemHight)
subView.tag = index
addSubview(subView)
}
layoutIfNeeded()
}
/// 删除某个标签
public func remove(at index:Int){
data.wp_remove(at: index)
reloadData()
}
/// 增加标签
public func append(_ elmt : Any){
data.append(elmt)
reloadData()
}
/// 插入某个标签
public func insert(_ elmt : Any,at:Int){
data.wp_insert(elmt, at: at)
reloadData()
}
/// 刷新数据源
public func reloadData(){
set(data: data)
}
private func resetSubItemsFrame(){
let maxWidth = self.wp.width
var y : CGFloat = 0
var row : CGFloat = 0
var rowX : CGFloat = 0
subviews.forEach { elmt in
elmt.wp_orgin = .zero
elmt.isHidden = false
}
for index in 0..<subviews.count {
let lastX = subviews.wp_get(of: index - 1)?.wp_maxX ?? 0
let view = subviews[index] as! V
let width = view.labelItemWidth(with: data[index])
if lastX + width + spacing > maxWidth{
row = row + 1
rowX = 0
}
y = row * (itemHight + rowSpacing)
view.wp_orgin = .init(x: rowX, y: y)
rowX = spacing + width + rowX
view.isHidden = (numberOfLines != 0 && Int(row) + 1 > numberOfLines)
}
}
public override func layoutSubviews() {
super.layoutSubviews()
resetSubItemsFrame()
}
}
//-------------- 使用到的方法1 ------------
/// 安全获取一个元素
/// - Parameter index: 所有
/// - Returns: 元素
func wp_get(of index: Int)->Element? {
if index <= count - 1, index >= 0 {
return self[index]
} else {
return nil
}
}
