How to establish the coordinate system of WeChat Mini Programs
This article introduces the relevant knowledge of "how to establish the coordinate system of WeChat Mini Programs". In the operation of the actual case, many people will encounter such a dilemma. Then let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!
Canvas coordinate system
Canvas is in a two-dimensional grid.
The coordinates of the upper left corner are (0,0).
In the previous chapter, we used this method fillRect (0,0,150,75).
It means: draw a rectangle of 150x 75px starting from the upper left corner (0,0).
Examples of coordinate systems:
We can add some events to observe its coordinate system.
Coordinates: ({{x}}, {{y}}) Page ({data: {x: 0, y: 0, hidden: true}, start: function (e) {this.setData ({hidden: false, x: e.touches [0] .x, y: e.touches [0] .y})}, move: function (e) {this.setData ({x: e.touches [0] .x) Y: e.touches [0] .y}), end: function (e) {this.setData ({hidden: true})})
When you put your finger in the canvas, the coordinates of the contact point are displayed below.
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