注意画用户头像 参数 注意
ctx.draw()绘图
// circleImg(ctx, img, x, y, r) { //切圆方法
// ctx.save();
// var d = 2 * r;
// var cx = x + r;
// var cy = y + r;
// ctx.arc(cx, cy, r, 0, 2 * Math.PI);
// ctx.clip();
// ctx.drawImage(img, x, y, d, d);
// ctx.restore();
// }
canvasImg(){
let that =
this;
let poster = that.data.poster;
//canvas画海报
wx.getImageInfo({
src: poster,
success:
function (res) {
console.log(res.width)
console.log(res.height)
let width =
'';
let height =
'';
width = res.width,
height = res.height;
that.setData({
width: res.width,
height: res.height
})
wx.downloadFile({
url: poster,
//仅为示例，并非真实的资源
success:
function (res) {
console.log(res,
111111);
if (res.statusCode ===
200) {
// 画海报
ctx.drawImage(poster,
0,
0, width, height);
wx.downloadFile({
url: that.data.userInfo.avatarUrl,
success:
function (res) {
ctx.save()
ctx.beginPath()
ctx.arc(
152,
638,
40,
0,
2 * Math.PI)
ctx.clip()
ctx.drawImage(res.tempFilePath,
112,
598,
80,
80);
ctx.closePath()
ctx.draw()
setTimeout(
function () {
wx.canvasToTempFilePath({
x:
0,
y:
0,
width: width,
height: height +
30,
canvasId:
'myCanvas',
success:
function (res) {
console.log(res.tempFilePath);
that.setData({
poster1: res.tempFilePath
})
}
})
},
2000)
}
})
}
}
})
}
})
},