微信小程序仙位解锁方法

微信小程序仙位解锁方法为：

1、填写解锁提示语{{title}}。

2、解锁肢团提示御饥碰语镇谈颜色{{titleColor}}。

3、重置按钮的显示隐藏{{resetHidden}}进行动态数据绑定。

4、对仙位进行三个解锁事件绑定。

整个功能基于canvas实现，首先添加画布组件，并设定样式

<!--index.wxml--><view class="container">

<canvas canvas-id="id-gesture-lock" class="gesture-lock" bindtouchstart="onTouchStart"

bindtouchmove="onTouchMove" bindtouchend="onTouchEnd"></canvas></view>.gesture-lock {

margin: 100rpx auto

width: 300px

height: 300px

background-color: #ffffff

}123456789101112

手势解锁实现代码在gesture_lock.js中(完整源码地址见末尾)。

初始化

constructor(canvasid, context, cb, opt){this.touchPoints = [] this.checkPoints = [] this.canvasid = canvasid this.ctx = context this.width = opt &&opt.width || 300//画布长度

this.height = opt &&opt.height || 300//画布宽度族毕

this.cycleNum = opt &&opt.cycleNum || 3 this.radius = 0 //触摸点半径

this.isParamOk = false this.marge = this.margeCircle = 25//触摸点及触摸点和画布边界间隔

this.initColor = opt &&opt.initColor || '#C5C5C3'

this.checkColor = opt &&opt.checkColor || '陆厅#5AA9EC' this.errorColor = opt &&opt.errorColor || '#e19984' this.touchState = "unTouch" this.checkParam() this.lastCheckPoint = null if (this.isParamOk) {// 计算触摸点的半径长度

this.radius = (this.width - this.marge * 2 - (this.margeCircle * (this.cycleNum - 1))) / (this.cycleNum * 2)this.radius = Math.floor(this.radius) // 计算每个触摸点的圆心位置

this.calCircleParams()

}this.onEnd = cb//滑动手势结束时的回调函数

}1234567891011121314151617181920212223242526

主要设置一些参数，如canvas的长宽，canvas的context，手势锁的个数(3乘3, 4乘4)，手势锁的颜色，手势滑动结束时的回调函数等。并计算出手势锁的半径。

计算每个手早穗隐势锁的圆心位置

calCircleParams() {let n = this.cycleNum let count = 0 for (let i = 0i <ni++) {for (let j = 0j <nj++){

count++ let touchPoint = {

x: this.marge + i * (this.radius * 2 + this.margeCircle) + this.radius,

y: this.marge + j * (this.radius * 2 + this.margeCircle) + this.radius,

index: count,

check: "uncheck",

}this.touchPoints.push(touchPoint)

}

}

}1234567891011121314151617

绘制手势锁

for (let i = 0i <this.touchPoints.lengthi++){this.drawCircle(this.touchPoints[i].x, this.touchPoints[i].y, this.radius, this.initColor)

} this.ctx.draw(true)1234

接下来就是识别用户的滑动行为，判断用户划过了哪些圆圈，进而识别出用户的手势。

在touchstart和touchmove事件中检测触发并更新画布

onTouchStart(e) {// 不识别多点触控

if (e.touches.length >1){this.touchState = "unTouch" return

}this.touchState = "startTouch" this.checkTouch(e) let point = {x:e.touches[0].x, y:e.touches[0].y} this.drawCanvas(this.checkColor, point)

}

onTouchMove(e) {if (e.touchState === "unTouch") {return

}if (e.touches.length >1){this.touchState = "unTouch" return

}this.checkTouch(e) let point = {x:e.touches[0].x, y:e.touches[0].y} this.drawCanvas(this.checkColor, point)

}123456789101112131415161718192021222324

检测用户是否划过某个圆圈

checkTouch(e) {for (let i = 0i <this.touchPoints.lengthi++){let point = this.touchPoints[i] if (isPointInCycle(e.touches[0].x, e.touches[0].y, point.x, point.y, this.radius)) {if (point.check === 'uncheck') {this.checkPoints.push(point) this.lastCheckPoint = point

}

point.check = "check"

return

}

}

}12345678910111213

更新画布

drawCanvas(color, point) {//每次更新之前先清空画布

this.ctx.clearRect(0, 0, this.width, this.height) //使用不同颜色和形式绘制已触发和未触发的锁

for (let i = 0i <this.touchPoints.lengthi++){let point = this.touchPoints[i] if (point.check === "check") {this.drawCircle(point.x, point.y, this.radius, color) this.drawCircleCentre(point.x, point.y, color)

}else {this.drawCircle(this.touchPoints[i].x, this.touchPoints[i].y, this.radius, this.initColor)

}

}//绘制已识别锁之间的线段

if (this.checkPoints.length >1) { let lastPoint = this.checkPoints[0]for (let i = 1i <this.checkPoints.lengthi++) { this.drawLine(lastPoint, this.checkPoints[i], color)

lastPoint = this.checkPoints[i]

}

}//绘制最后一个识别锁和当前触摸点之间的线段

if (this.lastCheckPoint &&point) {this.drawLine(this.lastCheckPoint, point, color)

}this.ctx.draw(true)

}12345678910111213141516171819202122232425262728

当用户滑动结束时调用回调函数并传递识别出的手势

onTouchEnd(e) {typeof this.onEnd === 'function' &&this.onEnd(this.checkPoints, false)

}

onTouchCancel(e) {typeof this.onEnd === 'function' &&this.onEnd(this.checkPoints, true)

}1234567

重置和显示手势错误

gestureError() {this.drawCanvas(this.errorColor)

}

reset() {for (let i = 0i <this.touchPoints.lengthi++) {this.touchPoints[i].check = 'uncheck'

}this.checkPoints = [] this.lastCheckPoint = null this.drawCanvas(this.initColor)

}123456789101112

如何调用

在onload方法中创建lock对象并在用户触摸事件中调用相应方法

onLoad: function () {

var s = this this.lock = new Lock("id-gesture-lock", wx.createCanvasContext("id-gesture-lock"), function(checkPoints, isCancel) {

console.log('over')

s.lock.gestureError()

setTimeout(function() {

s.lock.reset()

}, 1000)

}, {width:300, height:300})this.lock.drawGestureLock()

console.log('onLoad')var that = this

//调用应用实例的方法获取全局数据

app.getUserInfo(function(userInfo){

//更新数据

that.setData({

userInfo:userInfo

})

that.update()

})

},

onTouchStart: function (e) {

this.lock.onTouchStart(e)

},

onTouchMove: function (e) {

this.lock.onTouchMove(e)

},

onTouchEnd: function (e) {

this.lock.onTouchEnd(e)

}

Button 按钮

首先提醒一下大家游伍姿，如果你现在button标签不能用，不用担心，那是因为微信小程序存在神绝一个bug，你仔细看一下你的button标签的代码是不是这样的

<button>Content<button/>//而正确的代码是这样的<button>Content</button>123

1.在index.wxml中设置button按钮

上代码

<view class="page"><button size="default">Content</button><button size="mini">Content</button><button type="default">Content</button><橘拍button type="primary">Content</button><button type="warn">Content</button><button type="primary" plain="true">Content</button><button type="primary" disabled="true">Content</button><button type="primary" loading="true">Content</button><button type="primary" fromTyoe="reset">Content</button><button type="primary"hover-class="none">Content</button></view>1234567891011121314

解释

<view class ="container">//设置button的大小 <button size="mini|default">按钮</button>//设置button类型<button type="warn|default|primary">按钮</button>//是否透明<button plain="true">按钮</button>//是否禁用<button disable="true">按钮</button>//是否设置为加载按钮<button loa ding="true">按钮</button>//点击button的响应 效果<button hover-class="none">按钮</button>//给button绑定一个点击时间,thing 在js文件中设置<button bindtap="thing">按钮</button></view>1234567891011121314151617

2.icon图标的设置

上图

**上代码**style标签下的属性是为了让图像呈横向显示

wx：for语句类似于java，c++中的for循环语句，这里只是简化了步骤，你把数组在wx：for标签中实例化，然后{{item}}直接把就会从第一个显示到最后一个，省去了很多步骤，但我不知道这个，如果好几个数组嵌套循环的话，不知道怎么写？

<view class="page">

<icon type="success" size="50" color="red"></icon>

<view>------------------------------------</view>

<view style="display:inline-block">

<block wx:for="{{[10,20,30,40,50,60]}}">

<icon type="info" size="{{item}}"></icon>

</block>

</view>

<view>------------------------------------</view>

<view style="display:inline-block">

<block wx:for="{{iconColor}}">

<icon type="success" size="50"color="{{item}}"></icon>

</block>

</view>

<view>------------------------------------</view>

<view style="display:inline-block">

<block wx:for="{{iconType}}">

<icon size="50"type="{{item}}"></icon>

</block>

</view>

</view>1234567891011121314151617181920212223

index.js —– js文件一般有两种书写方式，一种就是这样，先实例化一个变量param，在里边写属性，然后再Page里边注册；另一种就是直接在Page里边设置属性。

var param={

data:{

iconSize:[20,30,40,50,60,70],

iconColor:[ 'red', 'orange', 'yellow', 'green', 'rgb(0,255,255)', 'blue', 'purple'],

iconType: ['success', 'info', 'warn', 'waiting', 'safe_success', 'safe_warn','success_circle', 'success_no_circle', 'waiting_circle', 'circle', 'download','info_circle', 'cancel', 'search', 'clear'

]

}

}

Page(param)

---