1.直接用bind调用
this.method.bind(this)
2.构造函数中用bind定义
class Foo{
constructor(){
this.method = this.method.bind(this);
}
}
3.用箭头函数定义或调用
//定义
class Foo{
constructor(){
//定义1
this.method1 = () => { this.xxx = b; }
}
//定义2
method2: () => { this.xx = a; }
} //调用
this.someThingAsync()
.then(() => {
this.method()
})