Vue子组件调用父组件方法

一、直接在子组件中通过this.$parent.event来调用父组件的方法

<!-- 父组件 -->
<template>
	<div>
		<child></child>
	</div>
</template>
<script>
import child from '~/components/dam/child';
export default {
	components: {
		child
	},
	methods: {
		fatherMethod () {
			console.log('测试');
		}
	}
};
</script>

<!-- 子组件 -->
<template>
  <div>
    <button @click="childMethod()">点击</button>
  </div>
</template>
<script>
  export default {
    methods: {
      childMethod() {
        this.$parent.fatherMethod();
      }
    }
  };
</script>

---

二、在子组件里用$emit向父组件触发一个事件，父组件监听这个事件

<!-- 父组件 -->
<template>
	<div>
		<child @fatherMethod="fatherMethod"></child>
	</div>
</template>
<script>
import child from '~/components/dam/child';
export default {
	components: {
		child
	},
	methods: {
		fatherMethod () {
			console.log('测试');
		}
	}
};
</script>

<!-- 子组件 -->
<template>
	<div>
		<button @click="childMethod()">点击</button>
	</div>
</template>
<script>
export default {
	methods: {
		childMethod () {
			this.$emit('fatherMethod');
		}
	}
};
</script>

---

三、父组件把方法传入子组件中，在子组件里直接调用这个方法

<!-- 父组件 -->
<template>
	<div>
		<child :fatherMethod="fatherMethod"></child>
	</div>
</template>
<script>
import child from '~/components/dam/child';
export default {
	components: {
		child
	},
	methods: {
		fatherMethod () {
			console.log('测试');
		}
	}
};
</script>

<!-- 子组件 -->
<template>
	<div>
		<button @click="childMethod()">点击</button>
	</div>
</template>
<script>
export default {
	props: {
		fatherMethod: {
			type: Function,
			default: null
		}
	},
	methods: {
		childMethod () {
			if (this.fatherMethod) {
				this.fatherMethod();
			}
		}
	}
};
</script>