我想实现一个接口，它包含一系列函数和属性，很少函数需要在回调模式下工作。例如：
interface Writer{
readData : (fileLocation: string) => void;
generatData: (fileLocation: string) => void;
}
我想执行generateData函数并在作业完成后通知。例如：
const WriterInstance:Writer ={
generateData("C:/workspace" , ()=>{
console.log("work is done");
});
readData("C:/workspace/file1.text" , ()=>{
console.log("work is done");
})
}
我完全误解了接口中回调的语法和调用。如果有人举例说明，那就太好了。
在您的界面中，您希望用两个参数来表示一个函数，第一个是字符串，第二个是函数，所以您可以这样写它：
interface Writer{
readData : (fileLocation: string, callback: ()=>void) => void;
generateData: (fileLocation: string, callback: ()=>void) => void;
}
只要想象回调函数是一个正常的参数。然后，将writerinstance定义为普通对象-只需定义它的属性
interface Writer{
readData : (fileLocation: string, callback: () => void) => void;
generateData: (fileLocation: string, callback: (error: Error, data?: any) => void) => void;
}
const WriterInstance: Writer = {
readData: (fileLocation: string, callback: () => void) => {
// dome something with fileLocation
callback();
},
generateData: (fileLocation: string, callback: (error: Error, data?: any) => void) => {
// dome something with fileLocation
callback(null, true);
}
}
// usage of WriterInstance
WriterInstance.generateData('C:/workspace/file1.text', (error, data) => {
if (error) {
console.log('work is not done');
return console.log(error);
}
console.log('work is done');
});
