自己搞的一个toast组件，使用快捷简单。初次发贴，还望各位多多指教
//一个简单的tost组件，用法：
// let Toast = reqire('Toast.js')
// Toast(text,{gravity,duration,bg_color})
//text:要显示的字符串
//gravity(可选):位置，String类型，可选值('CENTER','TOP','BOTTOM'),默认为'CENTER'
//duration(可选):时间，Number类型，单位为秒，默认1s
//bg_color(可选):颜色，cc.color类型，默认cc.color(102, 102, 102, 200)
function Toast(
text = "",
{
gravity = "CENTER",
duration = 1,
bg_color = cc.color(102, 102, 102, 200)
} = {}
) {
// canvas
let canvas = cc.director.getScene().getComponentInChildren(cc.Canvas);
let width = canvas.node.width;
let height = canvas.node.height;
let bgNode = new cc.Node();
// Lable文本格式设置
let textNode = new cc.Node();
let textLabel = textNode.addComponent(cc.Label);
textLabel.horizontalAlign = cc.Label.HorizontalAlign.CENTER;
textLabel.verticalAlign = cc.Label.VerticalAlign.CENTER;
textLabel.fontSize = 30;
textLabel.string = text;
// 当文本宽度过长时，设置为自动换行格式
if (text.length * textLabel.fontSize > (width * 3) / 5) {
textNode.width = (width * 3) / 5;
textLabel.overflow = cc.Label.Overflow.RESIZE_HEIGHT;
} else {
textNode.width = text.length * textLabel.fontSize;
}
let lineCount =
~~((text.length * textLabel.fontSize) / ((width * 3) / 5)) + 1;
textNode.height = textLabel.fontSize * lineCount;
// 背景设置
let ctx = bgNode.addComponent(cc.Graphics);
ctx.arc(
-textNode.width / 2,
0,
textNode.height / 2 + 20,
0.5 * Math.PI,
1.5 * Math.PI,
true
);
ctx.lineTo(textNode.width / 2, -(textNode.height / 2 + 20));
ctx.arc(
textNode.width / 2,
0,
textNode.height / 2 + 20,
1.5 * Math.PI,
0.5 * Math.PI,
true
);
ctx.lineTo(-textNode.width / 2, textNode.height / 2 + 20);
ctx.fillColor = bg_color;
ctx.fill();
bgNode.addChild(textNode);
// gravity 设置Toast显示的位置
if (gravity === "CENTER") {
bgNode.y = 0;
bgNode.x = 0;
} else if (gravity === "TOP") {
bgNode.y = bgNode.y + (height / 5) * 2;
} else if (gravity === "BOTTOM") {
bgNode.y = bgNode.y - (height / 5) * 2;
}
canvas.node.addChild(bgNode);
let finished = cc.callFunc(function() {
bgNode.destroy();
});
let action = cc.sequence(
cc.moveBy(duration, cc.v2(0, 0)),
cc.fadeOut(0.3),
finished
);
bgNode.runAction(action);
}
module.exports = Toast;