wordpress 网站logo,网站优化技术,龙岩做网站开发哪家做的好,广安市城乡建设规划局网站自定义下拉刷新控件
概述
用了很多的别人的下拉刷新控件#xff0c;想写一个玩玩#xff0c;自定义一个在使用的时候也会比较有意思。使应用更加的灵动一些#xff0c;毕竟谁不喜欢各种动画恰到好处的应用呢。
使用方式如下#xff1a;
tableview.refreshControl XRef…自定义下拉刷新控件
概述
用了很多的别人的下拉刷新控件想写一个玩玩自定义一个在使用的时候也会比较有意思。使应用更加的灵动一些毕竟谁不喜欢各种动画恰到好处的应用呢。
使用方式如下
tableview.refreshControl XRefreshControl.init(refreshingBlock: {DispatchQueue.main.asyncAfter(deadline: .now() 5) { [weak self] inself?.table.endRefreshing()}
})下边展示一下效果。 然后又搞了一个比较炫酷的版本效果图如下 继承 UIRefreshControl然后再其上直接添加view就能实现需要的加载效果尝试发现自定义的类需要把背景色设置一下要不然会有一下拉整体都显示出来的问题而且最好在view上再加一个view整体给铺上在设置一个背景色把小菊花给盖上。
简单版本代码
import Foundation
import UIKit
import SnapKitclass XRefreshControl: UIRefreshControl {var observation: NSKeyValueObservation?var isLocalRefreshing: Bool falselet indicator UIProgressView(progressViewStyle: .bar)var refreshingBlock: (()-Void)?override init(frame: CGRect) {super.init(frame: frame)observation observe(\.frame,options: .new) { [weak self] object, change inif self?.isRefreshing true {if self?.isLocalRefreshing false {if self?.refreshingBlock ! nil {self?.refreshingBlock!()}}self?.isLocalRefreshing true} else {let height change.newValue!.heightself?.indicator.progress min(Float(abs(height / 60)), 1)}}}convenience init(refreshingBlock: escaping ()-Void) {self.init(frame: .zero)self.refreshingBlock refreshingBlockself.layer.masksToBounds trueself.backgroundColor .redlet v UIView()v.backgroundColor .redlet center UIView()v.addSubview(center)let title UILabel()title.text 加载中title.textColor .blackcenter.addSubview(title)indicator.layer.masksToBounds truecenter.addSubview(indicator)self.addSubview(v)v.snp.makeConstraints { make inmake.edges.equalToSuperview()}center.snp.makeConstraints { make inmake.center.equalToSuperview()make.width.equalToSuperview()}indicator.snp.makeConstraints { make inmake.top.equalToSuperview()make.width.height.equalTo(32)make.centerX.equalToSuperview()}title.snp.makeConstraints { make inmake.top.equalTo(indicator.snp.bottom)make.bottom.equalToSuperview()make.centerX.equalToSuperview()}}required init?(coder: NSCoder) {fatalError(init(coder:) has not been implemented)}deinit {observation nil}override func endRefreshing() {super.endRefreshing()self.isLocalRefreshing falseindicator.progress 0}
}extension UITableView {func endRefreshing() {if ((self.refreshControl?.isKind(of: XRefreshControl.self)) ! nil) {self.refreshControl?.endRefreshing()}}
}加强版本代码
class XRefreshControl: UIRefreshControl {var observation: NSKeyValueObservation?var isLocalRefreshing: Bool falselet indicator UIProgressView(progressViewStyle: .bar)var refreshingBlock: (()-Void)?var displayLink: CADisplayLink?var targetDuration: CGFloat 3var fireDate: Date .nowvar endRefreshingDate: Date .nowvar title UILabel()var colors: [UIColor] [UIColor(hex: ffbe0b),UIColor(hex: fb5607),UIColor(hex: ff006e),UIColor(hex: 8338ec),UIColor(hex: 3a86ff),]var speedViews: [UIView] []var blockViews: [UIView] []// 背景var contentView UIView()override init(frame: CGRect) {super.init(frame: frame)observation observe(\.frame,options: .new) { [weak self] object, change inif self?.isRefreshing true {if self?.isLocalRefreshing false {if self?.refreshingBlock ! nil {self?.refreshingBlock!()}self?.startAnimation()}self?.isLocalRefreshing true} else {let height change.newValue!.heightself?.dragEffect(distance: height)}}}convenience init(refreshingBlock: escaping ()-Void) {self.init(frame: .zero)self.refreshingBlock refreshingBlockself.layer.masksToBounds trueself.backgroundColor .whitecontentView.backgroundColor .redself.addSubview(contentView)let center UIView()contentView.addSubview(center)title.text 下拉加载title.textColor .blackcenter.addSubview(title)center.addSubview(indicator)for _ in 0...6 {let v UIView()v.backgroundColor .whitespeedViews.append(v)contentView.addSubview(v)}for _ in 0..10 {let v UIView()v.backgroundColor .whiteblockViews.append(v)contentView.addSubview(v)}contentView.snp.makeConstraints { make inmake.edges.equalToSuperview()}center.snp.makeConstraints { make inmake.center.equalToSuperview()}indicator.snp.makeConstraints { make inmake.left.top.right.equalToSuperview()make.width.equalTo(120)make.height.equalTo(6)}title.snp.makeConstraints { make inmake.top.equalTo(indicator.snp.bottom).offset(10)make.bottom.equalToSuperview()make.centerX.equalToSuperview()}}required init?(coder: NSCoder) {fatalError(init(coder:) has not been implemented)}deinit {observation nilself.displayLink?.remove(from: RunLoop.current, forMode: .common)}func dragEffect(distance: CGFloat) {let diff abs(endRefreshingDate.timeIntervalSinceNow)if diff 0.5 {return}let precent min(abs(distance/140),1)let value precent * 8 * CGFloat.piself.indicator.progress 1let opacity Float(sin(value))
// print(opacity \(opacity))self.indicator.layer.opacity opacityself.title.text 下拉加载for i in 0..3 {let xx (self.frame.size.width / 12.0) * CGFloat(i1)var yy abs(distance/2)-2yy sin(distance/10 CGFloat(i1)*10)*6speedViews[i].frame .init(x: xx, y: yy, width: 2, height: 4)}for i in 3..6 {var x (self.frame.size.width / 12.0) * CGFloat(i1-3)x self.frame.width * 2.0 / 3.0var yy abs(distance/2)-2yy sin(distance/10 CGFloat(i1-3)*10)*6speedViews[i].frame .init(x: x, y: yy, width: 2, height: 4)}for i in 0..blockViews.count {blockViews[i].frame .init(x: 0, y: 0, width: 0, height: 0)}}func startAnimation() {displayLink CADisplayLink(target: self, selector: #selector(update))displayLink?.add(to: RunLoop.current, forMode: .common)fireDate .nowself.indicator.layer.opacity 1self.indicator.progress 1self.title.text 加载中let width self.frame.widthfor i in 0..blockViews.count {let size CGFloat.random(in: 4...8)let x CGFloat.random(in: 0...width)blockViews[i].frame .init(x: x, y: 0, width: size, height: size)}}objc func update(_ displayLink: CADisplayLink) {let diff abs(fireDate.timeIntervalSinceNow)var precent diff / targetDurationprecent min(precent, 1)self.indicator.progress Float(precent)contentView.backgroundColor colors[Int(diff*3)%colors.count]for i in 0..3 {var xx (self.frame.size.width / 12.0) * CGFloat(i1)var yy self.frame.height/2-12if i 1 {yy sin(CGFloat(diff)*6) * 2xx sin(CGFloat(diff)*6)} else {yy sin(CGFloat(diff)*6) * 4xx sin(CGFloat(diff)*6 CGFloat(i1))}speedViews[i].frame .init(x: xx, y: yy, width: 2, height: 24)}for i in 3..6 {var xx (self.frame.size.width / 12.0) * CGFloat(i1-3)xx self.frame.width * 2.0 / 3.0var yy self.frame.height/2-12if i 4 {yy sin(CGFloat(diff)*6) * 2xx sin(CGFloat(diff)*6)} else {yy sin(CGFloat(diff)*6) * 4xx sin(CGFloat(diff)*6 CGFloat(i1-3))}speedViews[i].frame .init(x: xx, y: yy, width: 2, height: 24)}for i in 0..self.blockViews.count {var x self.blockViews[i].frame.origin.xvar y self.blockViews[i].frame.origin.y self.blockViews[i].frame.width / 4if y self.contentView.frame.height {y 0x CGFloat.random(in: 0...self.contentView.frame.width)}self.blockViews[i].frame .init(origin: .init(x: x, y: y), size: self.blockViews[i].frame.size)}}override func endRefreshing() {super.endRefreshing()self.isLocalRefreshing falseself.displayLink?.remove(from: RunLoop.current, forMode: .common)endRefreshingDate .nowself.title.text 加载完毕}
}
extension UITableView {func endRefreshing() {if ((self.refreshControl?.isKind(of: XRefreshControl.self)) ! nil) {self.refreshControl?.endRefreshing()}}
}
extension UIColor {/// 使用 #FFFFFF 来初始化颜色convenience init(hex: String, alpha: CGFloat 1.0) {var hexFormatted: String hex.trimmingCharacters(in: CharacterSet.whitespacesAndNewlines).uppercased()if hexFormatted.hasPrefix(#) {hexFormatted String(hexFormatted.dropFirst())}if hexFormatted.hasPrefix(0x) {hexFormatted String(hexFormatted.dropFirst())hexFormatted String(hexFormatted.dropFirst())}assert(hexFormatted.count 6, Invalid hex code used.)var rgbValue: UInt64 0Scanner(string: hexFormatted).scanHexInt64(rgbValue)self.init(red: CGFloat((rgbValue 0xFF0000) 16) / 255.0,green: CGFloat((rgbValue 0x00FF00) 8) / 255.0,blue: CGFloat(rgbValue 0x0000FF) / 255.0,alpha: alpha)}
}参考地址
