How does WeChat Mini Programs realize the turntable of the lucky draw?
Most people do not understand the knowledge points of this article "how WeChat Mini Programs realizes the turntable in the raffle", so the editor summarizes the following contents for you. The content is detailed, the steps are clear, and it has a certain reference value. I hope you can gain something after reading this article. Let's take a look at this article "how WeChat Mini Programs achieves the turntable in the raffle".
The interface is the largest view outside, wrapping a flashing dot, a view eight prizes and a START button.
* flashing red and yellow dots
We calculate the position of each point and use the for loop to set the coordinate value.
Define red and yellow balls to change color and achieve flashing effect with setInterval
Calculate the position of the prize picture with the same theory and follow the bad definition
Bind the background color of the prize to achieve the selected effect through the current array subscript. Use setInterval to rotate the effect, and we use a random number to control the stop position.
Pay attention to clicking in the middle of rotation We should change START to WAIT and add judgment to the event to invalidate its clicks
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