phaser3设置重力gravity、检查边界WorldBounds、边界回弹Bounce，碰撞

phaser3设置重力gravity、检查边界WorldBounds、边界回弹Bounce，碰撞：

create: function () {
	//静态地板组
	var platforms = this.physics.add.staticGroup()
	//地板
	var fool = platforms.create(0, this.game.canvas.height, 'ground')
	//加入物理刚体
	var fruits = this.physics.add.sprite(100, 0, '1')
	//设置重力、碰撞回弹，可拆分写fruits.setGravityY(300)、fruits.setBounce(0.3)
	fruits.setGravityY(300).setBounce(0.3)
	//设置边界检测 fruits.setCollideWorldBounds(true)
	//设置碰撞
	this.physics.add.collider(fruits, platforms)
}