reactjs 在點(diǎn)擊分頁(yè)的時(shí)候，改變 state 報(bào)錯(cuò)TypeError: _this2.setState is not a function(…)下面是 代碼GetApiData(index){            let pageid = index;       let gitusername = this.state.gitusername;       let gitreponame = this.state.gitreponame;             let endApiUrl = '/api/getissues?gitusername='+ gitusername +'&gitreponame='+ gitreponame +'&pageid='+pageid;         fetch(endApiUrl)             .then((response) => {                return response.json();             })             .then((obj) => {                // 只要有以下這句話就會(huì)報(bào)錯(cuò) 走 `catch`                this.setState({                     data: obj                 });                        })             .catch((ex) => {                console.log(ex);             });              }     onChange(index){        this.setState = {                     pageid:index,         }                this.GetApiData(index);     }