实现财富之轮
我实现了一个由stackoverflow中的其他帖子启发的财富之轮，至少它正在旋转。目前我的问题是，如果我向下滑动图像的右侧，则轮子以错误的方向旋转。
有人能看出错误吗？
class WOFView: UIView {
@IBOutlet weak var wheelImage: UIImageView!
private var history = [Dictionary<String, Any>]()
private var rotation: CGFloat = 0
private var startAngle: CGFloat = 0
private var circleRotationOffset: CGFloat = 0
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
super.touchesBegan(touches, with: event)
if let touchPoint = touches.first?.location(in: self){
startAngle = atan2(self.frame.width - touchPoint.y, self.frame.height - touchPoint.x)
rotation = startAngle
history.removeAll()
}
}
override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) {
super.touchesMoved(touches, with: event)
guard let touchPoint = touches.first?.location(in: self) else {
return
}
let dic = ["time" : NSNumber(value: CFAbsoluteTimeGetCurrent()),
"point": NSValue(cgPoint: touchPoint),
"rotation": NSNumber(value: Float(circleRotationOffset + rotation))]
history.insert(dic, at: 0)
if history.count == 3{
history.removeLast()
}
rotation = atan2(self.frame.width - touchPoint.y, self.frame.height - touchPoint.x) - startAngle
wheelImage.transform = CGAffineTransform(rotationAngle: circleRotationOffset + rotation)
}
override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
super.touchesEnded(touches, with: event)
guard let touchPoint = touches.first?.location(in: self) else {
return
}
guard let lastObject = history.last else{
return
}
guard let pointValue = lastObject["point"] as? CGPoint else{
return
}
guard let timeValue = lastObject["time"] as? NSNumber else {
return
}
guard let rotationValue = lastObject["rotation"] as? NSNumber else {
return
}
let timeDif = CFAbsoluteTimeGetCurrent() - (timeValue.doubleValue)
circleRotationOffset = circleRotationOffset + rotation
let lastRotation = rotationValue.floatValue
let dist = sqrt(((pointValue.x - touchPoint.x) * (pointValue.x - touchPoint.x)) +
((pointValue.y - touchPoint.y) * (pointValue.y - touchPoint.y)))
let strength = max(Double(min(1.0, dist / 80.0)) * (timeDif / 0.25) * M_PI * 2, 0.3) * 30
print("S: \(strength)")
let p = circleRotationOffset
let dif = circleRotationOffset - CGFloat(lastRotation)
var inc = dif > 0
if dif > 3 || dif < -3{
inc = !inc
}
if (inc){
circleRotationOffset += CGFloat(strength)
}else{
circleRotationOffset -= CGFloat(strength)
}
let anim = CAKeyframeAnimation(keyPath: "transform.rotation.z")
anim.duration = max(strength / 2, 1.0)
anim.isCumulative = true
anim.values = [NSNumber(value: Float(p)), Float(circleRotationOffset)]
anim.keyTimes = [NSNumber(value: Float(0)),NSNumber(value: Float(1.0))]
anim.timingFunctions = [CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseOut)]
anim.isRemovedOnCompletion = false
anim.fillMode = kCAFillModeForwards
wheelImage.layer.removeAllAnimations()
wheelImage.layer.add(anim, forKey: "rotate")
}
}
修改 我使用UIPanGestureRecognizer简化了一些事情并希望分享结果：
enum SpinningDirection{
case clockwise
case antiClockwise
}
enum MajorDirection{
case up
case down
case left
case right
}
enum Quadrant{
case ul
case ur
case ll
case lr
}
class WOFView: UIView, CAAnimationDelegate {
@IBOutlet weak var wheelImage: UIImageView!
private var maxSpeed = 0
private var majorDirection = MajorDirection.right
private var quadrant = Quadrant.ul
private var spinningDirection = SpinningDirection.clockwise
private var winner = ""
func setup(){
let panGesture = UIPanGestureRecognizer(target: self, action: #selector(self.respondToPanGesture))
addGestureRecognizer(panGesture)
}
func respondToPanGesture(gesture: UIPanGestureRecognizer){
let velocity = gesture.velocity(in: self)
let vX = abs(velocity.x)
let vY = abs(velocity.y)
let speed = Int(vX + vY)
if speed > maxSpeed{
maxSpeed = speed
}
let location = gesture.location(in: self)
if vX > vY{
majorDirection = (velocity.x > 0) ? .right : .left
}
else{
majorDirection = (velocity.y > 0) ? .down : .up
}
if location.x < self.frame.width / 2 {
quadrant = (location.y < self.frame.height / 2 ) ? .ul : .ll
}
else {
quadrant = (location.y < self.frame.height / 2 ) ? .ur : .lr
}
switch quadrant {
case .ul:
switch majorDirection {
case .down, .left:
spinningDirection = .antiClockwise
case .up, .right:
spinningDirection = .clockwise
}
case .ur:
switch majorDirection {
case .down, .right:
spinningDirection = .clockwise
case .up, .left:
spinningDirection = .antiClockwise
}
case .lr:
switch majorDirection {
case .down, .left:
spinningDirection = .clockwise
case .up, .right:
spinningDirection = .antiClockwise
}
case .ll:
switch majorDirection {
case .down, .right:
spinningDirection = .antiClockwise
case .up, .left:
spinningDirection = .clockwise
}
}
if gesture.state == .began{
maxSpeed = 0
self.isUserInteractionEnabled = false
}
if gesture.state == .ended{
print("Ended")
print("MaxSpeed: \(maxSpeed)")
print("direction: \(spinningDirection)")
startAnimation(speed: maxSpeed, direction: spinningDirection)
}
}
private func startAnimation(speed: Int, direction : SpinningDirection){
var duration = Double(speed) / 10
if duration > 10{
duration = 10
}
if duration < 3{
duration = 3
}
print("duration: \(duration)")
let multiplier = (direction == .clockwise) ? -1.0 : 1.0
let normalizedSpeed = Double(speed) / 10 * multiplier
let goal = Double((speed * 100) % Int(2 * Double.pi * 100)) / 100.0
print("goal: \(goal)")
let halfPi = Double.pi/2
switch goal {
case 0*halfPi...1*halfPi:
winner = "1"
case 1*halfPi...2*halfPi:
winner = "4"
case 2*halfPi...3*halfPi:
winner = "3"
case 3*halfPi...4*halfPi:
winner = "2"
default:
print("?")
}
let anim = CAKeyframeAnimation(keyPath: "transform.rotation.z")
anim.duration = duration
anim.isCumulative = true
anim.values = [NSNumber(value: Float(normalizedSpeed)), Float(goal)]
anim.keyTimes = [NSNumber(value: Float(0)),NSNumber(value: Float(1))]
anim.timingFunctions = [CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseOut)]
anim.isRemovedOnCompletion = false
anim.fillMode = kCAFillModeForwards
anim.delegate = self
wheelImage.layer.removeAllAnimations()
wheelImage.layer.add(anim, forKey: "rotate")
}
func animationDidStop(_ anim: CAAnimation, finished flag: Bool) {
print("The winner is \(winner)")
self.isUserInteractionEnabled = true
}
}
2 个答案:
答案 0 :(得分：0)
介绍一种方法，找出被触摸的方面：
func touch(_ touch:UITouch, isInLeftHalfOf view: UIView) -> Bool {
let positionInView = touch.location(in: view)
return positionInView.x < view.frame.midX
}
如果它不是左侧则反转旋转：
override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) {
// your code ...
rotation = atan2(self.frame.width - touchPoint.y, self.frame.height - touchPoint.x) - startAngle
if !touch(touches.first!, isInLeftHalfOf: wheelImage) {
rotation = -rotation
}
wheelImage.transform = CGAffineTransform(rotationAngle: circleRotationOffset + rotation)
}
即使这样也解决了你问题中提到的情况（向下滑动图像的右侧），你很可能至少需要一些微调，但你明白了。
结果：
答案 1 :(得分：-2)
var padding = {top:20, right:40, bottom:0, left:0},
w = 500 - padding.left - padding.right,
h = 500 - padding.top - padding.bottom,
r = Math.min(w, h)/2,
rotation = 0,
oldrotation = 0,
picked = 100000,
oldpick = [],
color = d3.scale.category20();//category20c()
//randomNumbers = getRandomNumbers();
//http://osric.com/bingo-card-generator/?title=HTML+and+CSS+BINGO!&words=padding%2Cfont-family%2Ccolor%2Cfont-weight%2Cfont-size%2Cbackground-color%2Cnesting%2Cbottom%2Csans-serif%2Cperiod%2Cpound+sign%2C%EF%B9%A4body%EF%B9%A5%2C%EF%B9%A4ul%EF%B9%A5%2C%EF%B9%A4h1%EF%B9%A5%2Cmargin%2C%3C++%3E%2C{+}%2C%EF%B9%A4p%EF%B9%A5%2C%EF%B9%A4!DOCTYPE+html%EF%B9%A5%2C%EF%B9%A4head%EF%B9%A5%2Ccolon%2C%EF%B9%A4style%EF%B9%A5%2C.html%2CHTML%2CCSS%2CJavaScript%2Cborder&freespace=true&freespaceValue=Web+Design+Master&freespaceRandom=false&width=5&height=5&number=35#results
var data = [
{"label":"Question 1", "value":1, "question":"What CSS property is used for specifying the area between the content and its border?"}, // padding
{"label":"Question 2", "value":1, "question":"What CSS property is used for changing the font?"}, //font-family
{"label":"Question 3", "value":1, "question":"What CSS property is used for changing the color of text?"}, //color
{"label":"Question 4", "value":1, "question":"What CSS property is used for changing the boldness of text?"}, //font-weight
{"label":"Question 5", "value":1, "question":"What CSS property is used for changing the size of text?"}, //font-size
{"label":"Question 6", "value":1, "question":"What CSS property is used for changing the background color of a box?"}, //background-color
{"label":"Question 7", "value":1, "question":"Which word is used for specifying an HTML tag that is inside another tag?"}, //nesting
{"label":"Question 8", "value":1, "question":"Which side of the box is the third number in: margin:1px 1px 1px 1px; ?"}, //bottom
{"label":"Question 9", "value":1, "question":"What are the fonts that don't have serifs at the ends of letters called?"}, //sans-serif
{"label":"Question 10", "value":1, "question":"With CSS selectors, what character prefix should one use to specify a class?"}, //period
{"label":"Question 11", "value":1, "question":"With CSS selectors, what character prefix should one use to specify an ID?"}, //pound sign
{"label":"Question 12", "value":1, "question":"In an HTML document, which tag holds all of the content people see?"}, //<body>
{"label":"Question 13", "value":1, "question":"In an HTML document, which tag indicates an unordered list?"}, //<ul>
{"label":"Question 14", "value":1, "question":"In an HTML document, which tag indicates the most important heading of your document?"}, //<h1>
{"label":"Question 15", "value":1, "question":"What CSS property is used for specifying the area outside a box?"}, //margin
{"label":"Question 16", "value":1, "question":"What type of bracket is used for HTML tags?"}, //< >
{"label":"Question 17", "value":1, "question":"What type of bracket is used for CSS rules?"}, // { }
{"label":"Question 18", "value":1, "question":"Which HTML tag is used for specifying a paragraph?"}, //<p>
{"label":"Question 19", "value":1, "question":"What should always be the very first line of code in your HTML?"}, //<!DOCTYPE html>
{"label":"Question 20", "value":1, "question":"What HTML tag holds all of the metadata tags for your page?"}, //<head>
{"label":"Question 21", "value":1, "question":"In CSS, what character separates a property from a value?"}, // colon
{"label":"Question 22", "value":1, "question":"What HTML tag holds all of your CSS code?"}, // <style>
{"label":"Question 23", "value":1, "question":"What file extension should you use for your web pages?"}, // .html
{"label":"Question 24", "value":1, "question":"Which coding language is used for marking up content and structure on a web page?"}, // HTML
{"label":"Question 25", "value":1, "question":"Which coding language is used for specifying the design of a web page?"}, // CSS
{"label":"Question 26", "value":1, "question":"Which coding language is used for adding functionality to a web page?"}, // JavaScript
{"label":"Question 27", "value":1, "question":"What CSS property is used for making the edges of a box visible?"}, // border
{"label":"Question 28", "value":1, "question":"What character symbol is used at the end of each CSS statement?"},//semi-colon
{"label":"Question 29", "value":1, "question":"By default, how wide is a <div> box?"}, //100%
{"label":"Question 30", "value":1, "question":"What character symbol do I use to specify multiple CSS selectors in one code block?"} //comma
];
var svg = d3.select('#chart')
.append("svg")
.data([data])
.attr("width", w + padding.left + padding.right)
.attr("height", h + padding.top + padding.bottom);
var container = svg.append("g")
.attr("class", "chartholder")
.attr("transform", "translate(" + (w/2 + padding.left) + "," + (h/2 + padding.top) + ")");
var vis = container
.append("g");
var pie = d3.layout.pie().sort(null).value(function(d){return 1;});
// declare an arc generator function
var arc = d3.svg.arc().outerRadius(r);
// select paths, use arc generator to draw
var arcs = vis.selectAll("g.slice")
.data(pie)
.enter()
.append("g")
.attr("class", "slice");
arcs.append("path")
.attr("fill", function(d, i){ return color(i); })
.attr("d", function (d) { return arc(d); });
// add the text
arcs.append("text").attr("transform", function(d){
d.innerRadius = 0;
d.outerRadius = r;
d.angle = (d.startAngle + d.endAngle)/2;
return "rotate(" + (d.angle * 180 / Math.PI - 90) + ")translate(" + (d.outerRadius -10) +")";
})
.attr("text-anchor", "end")
.text( function(d, i) {
return data[i].label;
});
container.on("click", spin);
function spin(d){
container.on("click", null);
//all slices have been seen, all done
console.log("OldPick: " + oldpick.length, "Data length: " + data.length);
if(oldpick.length == data.length){
console.log("done");
container.on("click", null);
return;
}
var ps = 360/data.length,
pieslice = Math.round(1440/data.length),
rng = Math.floor((Math.random() * 1440) + 360);
rotation = (Math.round(rng / ps) * ps);
picked = Math.round(data.length - (rotation % 360)/ps);
picked = picked >= data.length ? (picked % data.length) : picked;
if(oldpick.indexOf(picked) !== -1){
d3.select(this).call(spin);
return;
} else {
oldpick.push(picked);
}
rotation += 90 - Math.round(ps/2);
vis.transition()
.duration(3000)
.attrTween("transform", rotTween)
.each("end", function(){
//mark question as seen
d3.select(".slice:nth-child(" + (picked + 1) + ") path")
.attr("fill", "#111");
//populate question
d3.select("#question h1")
.text(data[picked].question);
oldrotation = rotation;
container.on("click", spin);
});
}
//make arrow
svg.append("g")
.attr("transform", "translate(" + (w + padding.left + padding.right) + "," + ((h/2)+padding.top) + ")")
.append("path")
.attr("d", "M-" + (r*.15) + ",0L0," + (r*.05) + "L0,-" + (r*.05) + "Z")
.style({"fill":"black"});
//draw spin circle
container.append("circle")
.attr("cx", 0)
.attr("cy", 0)
.attr("r", 60)
.style({"fill":"white","cursor":"pointer"});
//spin text
container.append("text")
.attr("x", 0)
.attr("y", 15)
.attr("text-anchor", "middle")
.text("SPIN")
.style({"font-weight":"bold", "font-size":"30px"});
function rotTween(to) {
var i = d3.interpolate(oldrotation % 360, rotation);
return function(t) {
return "rotate(" + i(t) + ")";
};
}
function getRandomNumbers(){
var array = new Uint16Array(1000);
var scale = d3.scale.linear().range([360, 1440]).domain([0, 100000]);
if(window.hasOwnProperty("crypto") && typeof window.crypto.getRandomValues === "function"){
window.crypto.getRandomValues(array);
console.log("works");
} else {
//no support for crypto, get crappy random numbers
for(var i=0; i < 1000; i++){
array[i] = Math.floor(Math.random() * 100000) + 1;
}
}
return array;
}text{
font-family:Helvetica, Arial, sans-serif;
font-size:11px;
pointer-events:none;
}
#chart{
position:absolute;
width:500px;
height:500px;
top:0;
left:0;
}
#question{
position: absolute;
width:400px;
height:500px;
top:0;
left:520px;
}
#question h1{
font-size: 50px;
font-weight: bold;
font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
position: absolute;
padding: 0;
margin: 0;
top:50%;
-webkit-transform:translate(0,-50%);
transform:translate(0,-50%);
}<script src="https://d3js.org/d3.v3.min.js" charset="utf-8"></script>
<div id="chart"></div>
<div id="question"><h1></h1></div>
这会帮助你 原始来源：https://gist.github.com/jrue/a2aaf36b3c096925ccbf
相关问题
最新问题
- 我写了这段代码，但我无法理解我的错误
- 我无法从一个代码实例的列表中删除 None 值，但我可以在另一个实例中。为什么它适用于一个细分市场而不适用于另一个细分市场？
- 是否有可能使 loadstring 不可能等于打印？卢阿
- java中的random.expovariate()
- Appscript 通过会议在 Google 日历中发送电子邮件和创建活动
- 为什么我的 Onclick 箭头功能在 React 中不起作用？
- 在此代码中是否有使用“this”的替代方法？
- 在 SQL Server 和 PostgreSQL 上查询，我如何从第一个表获得第二个表的可视化
- 每千个数字得到
- 更新了城市边界 KML 文件的来源？