Use a small program to create a chat session, which can be used for online customer service chat sessions, etc. The following is a detailed explanation of the code. It is also very simple to operate. Let’s create it together.

Chat session

Scenario

Used for online customer service chat conversations, etc.

1. Layout points

1. Triangular Arrow

Draw a 26rpx*26rpx rectangle, rotate it 45 degrees, and then hide half of it to form a right triangle on the bubble.

/* 三角箭头 */.body .triangle {    background: white;    width: 20rpx;    height: 20rpx;    margin-top: 26rpx;    transform: rotate(45deg);    position: absolute;
}

2. Flex-flow changes the flow direction

Take the values ​​['row' | 'row-reverse'] respectively, so that the avatar of the message sent by the other party is on the left, and the avatar of the message sent by yourself is on the left On the right.

3. Press and hold to center the suspended layer horizontally and vertically

Option 1, js manual calculation

data: {    hud_top: (wx.getSystemInfoSync().windowHeight - 150) / 2,
    hud_left: (wx.getSystemInfoSync().windowWidth - 150) / 2,
}

Option 2, pure css

/*悬浮提示框*/.hud-container {    position: fixed;    width: 150px;    height: 150px;    left: 50%;    top: 50%;    margin-left: -75px;    margin-top: -75px;
}

passed In comparison, Option 2 is better than Option 1

JS circle

1. Touch event to realize sliding up to cancel voice input

Press to appear suspended, slide up to exceed a certain displacement When a cancellation prompt appears, let go and cancel; if the swipe has not exceeded, let go and send

touchStart: function (e) {    // 触摸开始
    var startY = e.touches[0].clientY;    // 记录初始Y值
    this.setData({      startY: startY,      status: this.data.state.pressed
    });
  },  touchMove: function (e) {    // 触摸移动
    var movedY = e.touches[0].clientY;    var distance = this.data.startY - movedY;    // console.log(distance);
    // 距离超过50，取消发送
    this.setData({      status: distance > 50 ? this.data.state.cancel : this.data.state.pressed
    });
  },  touchEnd: function (e) {    // 触摸结束
    var endY = e.changedTouches[0].clientY;    var distance = this.data.startY - endY;    // console.log(distance);
    // 距离超过50，取消发送
    this.setData({      cancel: distance > 50 ? true : false,      status: this.data.state.normal
    });    // 不论如何，都结束录音
    this.stop();
  },

2. After sending the message, scroll to the end of the page

data: {  toView: ''}

reply: {// ...this.scrollToBottom()
},scrollToBottom: function () {    this.setData({      toView: 'row_' + (this.data.message_list.length - 1)
    });
  },

Related articles:

Photo Two-way synchronization chat applet [ByJavaOnLinux] implementation code

Implementation method of a conversation memo applet

Related videos:

Customer service session api2-Easy video tutorial on how to develop and produce WeChat mini programs

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