使用 AsyncStorage 在首次登录时显示屏幕
Using AsyncStorage to show screen on first login
我试图仅在用户使用 AsyncStorage
首次登录时显示披露屏幕。目前 getData
正在返回一个 Promise,它会在首次登录时直接进入登录屏幕。
我能得到一些帮助来使它按照我想要的方式运行吗?
这是我的登录处理程序:
const key = 'key';
const storeData = async () => {
try {
await AsyncStorage.setItem('key', 'true');
} catch (error) {
// saving failed
console.log(error.message);
}
};
const getData = async key => {
let value = '';
try {
value = await AsyncStorage.getItem(key);
return JSON.parse(value);
} catch (e) {
console.log(error.message);
}
};
const _loginHandler = () => {
if (userName == '' || password == '') {
console.log('gagagagagagagagagagagagagagagagag');
} else {
setShowLoading(true);
const payload = {userName: userName.trim(), password: password.trim()};
setUserName('');
setPassword('');
_UserLoginHandler(payload).then(data => {
setShowLoading(false);
if (data.error) {
GlobalShowSnackBar(data.error);
} else {
setTimeout(() => {
setUserId(data);
//props.navigation.replace(getData("key")?'Landing':'Disclosure')
console.log('Key Value ' + JSON.stringify(getData('key'))); <-- this outputs Key Value {"_U":0,"_V":0,"_W":null,"_X":null}
if (getData('key')) {
props.navigation.navigate('Landing');
} else {
storeData(key);
props.navigation.navigate('Disclosure');
}
}, 500);
}
});
}
};
我可以使用它
getData('key').then(val => {
if (val) {
props.navigation.navigate('Landing');
} else {
storeData(key);
props.navigation.navigate('Disclosure');
}
});
我试图仅在用户使用 AsyncStorage
首次登录时显示披露屏幕。目前 getData
正在返回一个 Promise,它会在首次登录时直接进入登录屏幕。
我能得到一些帮助来使它按照我想要的方式运行吗?
这是我的登录处理程序:
const key = 'key';
const storeData = async () => {
try {
await AsyncStorage.setItem('key', 'true');
} catch (error) {
// saving failed
console.log(error.message);
}
};
const getData = async key => {
let value = '';
try {
value = await AsyncStorage.getItem(key);
return JSON.parse(value);
} catch (e) {
console.log(error.message);
}
};
const _loginHandler = () => {
if (userName == '' || password == '') {
console.log('gagagagagagagagagagagagagagagagag');
} else {
setShowLoading(true);
const payload = {userName: userName.trim(), password: password.trim()};
setUserName('');
setPassword('');
_UserLoginHandler(payload).then(data => {
setShowLoading(false);
if (data.error) {
GlobalShowSnackBar(data.error);
} else {
setTimeout(() => {
setUserId(data);
//props.navigation.replace(getData("key")?'Landing':'Disclosure')
console.log('Key Value ' + JSON.stringify(getData('key'))); <-- this outputs Key Value {"_U":0,"_V":0,"_W":null,"_X":null}
if (getData('key')) {
props.navigation.navigate('Landing');
} else {
storeData(key);
props.navigation.navigate('Disclosure');
}
}, 500);
}
});
}
};
我可以使用它
getData('key').then(val => {
if (val) {
props.navigation.navigate('Landing');
} else {
storeData(key);
props.navigation.navigate('Disclosure');
}
});