Zerker 一个简单又灵活的 flutter canvas 图形动画片库

); }}第二步后继者自ZKApp

class MyZKApp extends ZKApp {第三步在init线性之前预调用资产

init() { super.init(); stage.color = Colors.blueGrey; Map urls = { "boy": {"json": "assets/boy.json", "image": "assets/boy.png"}, "bg": "assets/bg.png", }; // preload all assets ZKAssets.preload( urls: urls, onProgress: (scale) { print("Assets loading ${scale * 100}%"); }, onLoad: () { initScene(); _loaded = true; print("Assets load Complete"); });}第四步创设各种锕系元素

// add title title = ZKText() ..position.x = appWidth / 2 ..position.y = 20 ..text = "Please click anywhere" ..setStyle( color: Colors.blueGrey, backgroundColor: Colors.greenAccent, textAlign: TextAlign.center); stage.addChild(title); // add boy boy = ZKSprite(key: "boy") ..setScale(1) ..anchor.y = 1 ..position.x = size.width / 2 ..position.y = appHeight - 16 ..animator.make("run", ["Run ({1-15}).png"]) ..animator.make("jump", ["Jump ({1-15}).png"]) ..animator.make("dead", ["Dead ({1-15}).png"]) ..animator.play("run", 25, true); stage.addChild(boy); 第五步去除互动事件

_addAction() { boy.onTapDown = (event) { bg.stop(); _jumping = false; boy.animator.play("dead", 20); }; stage.onTapDown = (event) { if (event.target == boy) return; if (_jumping) return; bg.play(); _jumping = true; boy.animator.play("jump", 20); ZKTween(boy) .to({"y": appHeight - 120}, 500) .easing(Ease.circ.easeOut) .chain(ZKTween(boy).to({"y": appHeight - 16}, 500).easing(Ease.circ.easeIn).onComplete((obj) { boy.animator.play("run", 25, true); _jumping = false; })) .start(); };}

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