【发布时间】：2019-11-12 12:30:32
【问题描述】：
这是我的申请流程：
一旦用户登录，他们可以单击打开CustomDrawer 堆栈的汉堡堆栈，然后单击label: "EVENTS"。这会将用户重定向到AvailableEvents 组件：
export class AvailableEvents extends PureComponent {
static propTypes = {
availableEvents: PropTypes.array,
displayFooter: PropTypes.bool,
fetchEvents: PropTypes.func,
loading: PropTypes.bool,
navigation: PropTypes.object,
setSelectedEvent: PropTypes.func,
userState: PropTypes.string
};
constructor(props) {
super(props);
this.state = {
refreshing: false,
appState: AppState.currentState
};
}
async componentDidMount() {
AppState.addEventListener("change", this._handleAppStateChange);
const doRefresh = await shouldRefresh("events");
if (this.props.availableEvents.length === 0 || doRefresh) {
this.props.fetchEvents();
}
}
componentWillUnmount() {
AppState.removeEventListener("change", this._handleAppStateChange);
}
_handleAppStateChange = async appState => {
if (
this.state.appState.match(/inactive|background/) &&
appState === "active"
) {
const doRefresh = await shouldRefresh("events");
if (doRefresh) {
this.props.fetchEvents();
}
}
this.setState({ appState });
};
_goto = event => {
this.props.setSelectedEvent(event);
console.log(this.props.setSelectedEvent(event));
const title = `${event.LegislatureType} Event`;
this.props.navigation.navigate("EventDetails", { title });
};
_keyExtractor = item => item.Key;
_renderEvent = ({ item }) => {
return (
<EventFeedCard
style={listStyles.push}
mainActionButtonPress={() => this._goto(item)}
event={item}
/>
);
};
_onRefresh = async () => {
try {
this.setState({ refreshing: true });
this.props
.fetchEvents()
.then(() => {
this.setState({ refreshing: false });
})
.catch(() => {
this.setState({ refreshing: false });
});
} catch (e) {
this.setState({ refreshing: false });
}
};
// when clicking EVENTS from CustomDrawer it loads from here
render() {
if (this.props.loading && !this.state.refreshing) {
console.log(
"Loading from AvailableEvents: ",
this.props.loading && !this.state.refreshing
);
return <Loading />;
}
这是EventFeedCard的父组件：
const EventFeedCard = props => {
//prettier-ignore
const source = props.event.ImageURL ? {uri: props.event.ImageURL} : defaultImage;
//prettier-ignore
const contentStyles = deviceHelpers.isTablet ? feedContentStyles.tabletContent : feedContentStyles.content;
//prettier-ignore
const contentFlexer = deviceHelpers.isTablet ? {flex: 2} : {flex: 1};
//prettier-ignore
const eventLocation = `${props.event.Location.City}, ${props.event.Location.StateAbbreviation}`;
const displayTotal = props.isRegistered && !props.event.IsFree;
return (
<Card style={props.style}>
<View style={feedContentStyles.header}>
<Text style={feedContentStyles.title}>
{`NFIB ${props.event.LegislatureType.toUpperCase()} EVENT`}
</Text>
<Text style={feedContentStyles.postDate}>
{`On ${format(props.event.StartDate, "MMM D, YYYY")}`}
</Text>
</View>
{!deviceHelpers.isTablet && (
<View style={feedContentStyles.feedMainImageContainer}>
<Image source={source} style={feedContentStyles.feedMainImage} />
</View>
)}
<Divider />
<View style={contentStyles}>
{deviceHelpers.isTablet && (
<View style={feedContentStyles.feedMainImageContainerTablet}>
<Image source={source} style={feedContentStyles.feedMainImage} />
</View>
)}
<View style={contentFlexer}>
<Text style={feedContentStyles.contentTitle}>
{props.event.Title}
</Text>
<View style={[styles.detailsRow, { marginBottom: 8 }]}>
<Icon
name="date-range"
size={16}
color="rgba(0,0,0,0.5)"
style={styles.icon}
/>
<EventDate event={props.event} />
</View>
<View style={[styles.detailsRow, { marginBottom: 8 }]}>
<Icon
name="location-on"
size={16}
color="rgba(0,0,0,0.5)"
style={styles.icon}
/>
<Text style={styles.smallerText}>{eventLocation}</Text>
</View>
{displayTotal && (
<View style={[styles.detailsRow, { marginBottom: 8 }]}>
<Icon
name="credit-card"
size={16}
color="rgba(0,0,0,0.54)"
style={styles.icon}
/>
<Text style={styles.smallerText}>{`$${props.grandTotal}`}</Text>
</View>
)}
<Text style={feedContentStyles.parragraph}>
{props.event.ShortDescription}
</Text>
</View>
</View>
{props.isRegistered && <Divider style={styles.dividerPusher} />}
<View style={[feedContentStyles.footerActions, styles.footerActions]}>
{
props.isRegistered
/* && (
<TouchableOpacity
style={styles.calendarBtn}
onPress={props.handleAddToCalendar}
>
<Text style={styles.gothamBold14Black}>{"ADD TO CALENDAR"}</Text>
</TouchableOpacity>
) */
}
<TextButton
color={v2Colors.green}
title={"VIEW DETAILS"}
titleColor={v2Colors.white}
onPress={props.mainActionButtonPress}
titleStyle={v2ButtonStyles.titleStyle}
/>
</View>
</Card>
);
};
EventFeedCard 是 Details 组件的父组件：
export class Details extends Component {
static propTypes = {
auth: PropTypes.object,
checkingUserMembership: PropTypes.bool,
checkUserMembership: PropTypes.func,
fetchSelectedEvent: PropTypes.func,
isLapsedMember: PropTypes.bool,
isMember: PropTypes.bool,
loadingSelectedEvent: PropTypes.bool,
navigation: PropTypes.object,
primaryIndividual: PropTypes.object,
selectedEvent: PropTypes.object,
selectedPrice: PropTypes.object,
setSelectedPrice: PropTypes.func,
userKey: PropTypes.string,
userOrganization: PropTypes.object
};
static navigationOptions = ({ navigation }) => ({
title: navigation.state.params.title
});
constructor(props) {
super(props);
const prices = getDetailPrices(this.props);
this.state = {
userOpenedMemberLink: false,
appState: AppState.currentState,
...prices
};
}
componentDidMount() {
this.props.fetchSelectedEvent();
this.props.checkUserMembership();
AppState.addEventListener("change", this._handleAppStateChange);
if (this.props.isMember && !this.props.isLapsedMember) {
this._selectMemberPrice();
}
}
componentWillUnmount() {
AppState.removeEventListener("change", this._handleAppStateChange);
}
_selectMemberPrice = () => {
const price = this.state.individualPrices.find(p => p.IsMemberPrice);
if (price) {
this.props.setSelectedPrice(price);
}
};
_handleAppStateChange = async appState => {
if (
this.state.appState.match(/inactive|background/) &&
appState === "active"
) {
this.props.checkUserMembership();
}
};
_validateCapacity = selectedEvent => {
if (selectedEvent.NumberOfSeatsAvailable === 0) {
Alert.alert(
"Capacity Exceeded",
capacityLimit,
[
{
text: "OK",
onPress: () => false,
style: "cancel"
}
],
{ cancelable: false }
);
return false;
}
return true;
};
_alertNoTableSeats = () => {
Alert.alert(
"Capacity Exceeded",
capacityLimitTable,
[
{
text: "OK",
onPress: () => false,
style: "cancel"
}
],
{ cancelable: false }
);
};
_navigate = () => {
const {
selectedEvent,
isMember,
selectedPrice,
isLapsedMember
} = this.props;
const hasSeats = this._validateCapacity(selectedEvent);
console.log("Validating Seating Capacity to be: ", hasSeats);
if (hasSeats) {
if (selectedEvent.IsFree) {
//eslint-disable-next-line
if (selectedEvent.IsMembersOnly && (!isMember || isLapsedMember)) {
this._alertMembershipIssue();
} else {
this.props.navigation.navigate("EventRegistration");
}
} else if (selectedPrice) {
//eslint-disable-next-line
this.props.navigation.navigate("EventRegistration");
} else {
Alert.alert(
"Event Pricing",
"Please select a price before continuing.",
[
{
text: "OK",
onPress: () => false,
style: "cancel"
}
],
{ cancelable: false }
);
}
}
};
_loginAsMember = (price = null) => {
this.props.navigation.navigate("MembershipConfirmation", { price });
};
_canSelectPrice = price => {
if (price.IsMemberPrice && this.props.isLapsedMember) {
return false;
}
if (!this.props.isMember && price.IsMemberPrice) {
return false;
}
return true;
};
_tableSeatsAvailable = price => {
if (
price.IsTable &&
this.props.selectedEvent.NumberOfSeatsAvailable < price.NumberOfSeats
) {
return false;
}
return true;
};
_selectPrice = async price => {
const canSelect = this._canSelectPrice(price);
if (canSelect) {
const tableSeatsAvailable = this._tableSeatsAvailable(price);
if (tableSeatsAvailable) {
this.props.setSelectedPrice(price);
} else {
this._alertNoTableSeats();
}
} else {
this._alertMembershipIssue(price);
}
};
_alertMembershipIssue = (price = null) => {
const { isLapsedMember, userKey } = this.props;
const buttons = [
{
text: isLapsedMember ? "Renew Membership" : "Join NFIB",
onPress: () => {
let url = `${env.membershipJoinLink}=${userKey}`;
if (isLapsedMember) {
const { userOrganization, primaryIndividual } = this.props;
const { PostalCode: zip } = userOrganization.Addresses[0];
const lastName = primaryIndividual.PersonalDetails.LastName;
const memberID = userOrganization.Id;
//prettier-ignore
url = `${env.membershipRenewLink}?lname=${lastName}&mid=${memberID}&zip=${zip}`;
}
Linking.openURL(url);
this.setState({ userOpenedMemberLink: true });
}
},
{
text: "Cancel",
onPress: () => false,
style: "cancel"
}
];
if (!isLapsedMember) {
buttons.unshift({
text: "I am a Member",
onPress: () => this._loginAsMember(price)
});
}
Alert.alert(
isLapsedMember ? "Renew Membership" : "Members Only",
memberMsg,
buttons,
{ cancelable: false }
);
};
// clicking on VIEW DETAILS from EventFeedCard component fires off this if conditional
render() {
if (this.props.loadingSelectedEvent) {
console.log(
"Loading from Details component: ",
this.props.loadingSelectedEvent
);
return <Loading />;
}
return (
<EventDetails
event={this.props.selectedEvent}
handleRegistrationButtonPress={this._navigate}
handleSelectPrice={this._selectPrice}
tablePrices={this.state.tablePrices}
individualPrices={this.state.individualPrices}
selectedPrice={this.props.selectedPrice}
checkingUserMembership={this.props.checkingUserMembership}
/>
);
}
}
从EventDetails 组件中单击REGISTER FOR EVENTS，该组件是EventFeedCard andDetails` 的子组件：
const EventDetails = props => {
return (
<SafeAreaView style={styles.container}>
<ScrollView contentContainerStyle={styles.list}>
<EventMainDetails event={props.event} displayRemainingSeats={true} />
<View style={styles.cardsContainer}>
{!deviceHelpers.isTablet && <PhoneEventDescription {...props} />}
{deviceHelpers.isTablet && <TabletEventDescription {...props} />}
{props.event.IsRestricted && (
<Text style={styles.restrictedText}>{restrictedText}</Text>
)}
</View>
</ScrollView>
{!props.event.IsRestricted && (
<TouchableOpacity
style={[styles.footer, styles.rowFooter]}
onPress={props.handleRegistrationButtonPress}
>
{props.checkingUserMembership ? (
{
/* <ActivityIndicator /> */
}
) : (
<Text style={styles.footerBtnText}>
{"HOWDY! REGISTER FOR EVENT"}
</Text>
)}
</TouchableOpacity>
)}
</SafeAreaView>
);
};
触发重定向到EventRegistrationForm:
const EventRegistrationForm = ({
badgeNameError,
currentUser,
displayGuestErrors,
event,
eventBadgeName,
grandTotal,
guestUsers,
handleAddGuestButtonPress,
handleBadgeNameInputChange,
handleGuestFirstNameChange,
handleGuestLastNameChange,
handlePaymentsButtonPress,
handleRemoveGuestButtonPress,
selectedPrice,
userOrganization,
}) => {
const displayPersonal = event.IsFree || !selectedPrice.IsTable;
const roomForGuests =
(event.NumberOfSeatsAvailable || 0) > guestUsers.length + 1;
const displayAddButton =
(event.IsFree || roomForGuests) && !(selectedPrice || {}).IsTable;
return (
<SafeAreaView style={styles.container}>
<KeyboardAwareScrollView
contentContainerStyle={{paddingBottom: 121}}
showsVerticalScrollIndicator={false}
keyboardShouldPersistTaps={'handled'}
enableOnAndroid={true}
extraHeight={90}
>
<EventMainDetails
event={event}
currentUser={currentUser}
displayRemainingSeats={true}
/>
<View style={styles.cardsContainer}>
{selectedPrice &&
selectedPrice.IsTable && (
<Card style={styles.tablePriceCard} tappable={false}>
<Text style={styles.contentTitle}>
{selectedPrice.TableName}
</Text>
<Text style={styles.contentTitle}>
{`$${selectedPrice.Price}`}
</Text>
</Card>
)}
{displayPersonal && (
<EventRegistrationFormPersonalDetails
handleBadgeNameInputChange={handleBadgeNameInputChange}
eventBadgeName={eventBadgeName}
currentUser={currentUser}
eventPrice={selectedPrice && selectedPrice.Price}
userOrganization={
userOrganization && userOrganization.OrganizationDetails.Name
}
badgeNameError={badgeNameError}
/>
)}
<EventRegistrationGuestForm
handleGuestLastNameChange={handleGuestLastNameChange}
handleGuestFirstNameChange={handleGuestFirstNameChange}
guestUsers={guestUsers}
handleRemoveGuestButtonPress={handleRemoveGuestButtonPress}
isTableGuest={selectedPrice && selectedPrice.IsTable}
displayGuestErrors={displayGuestErrors}
/>
{!displayAddButton &&
!selectedPrice.IsTable && (
<Text>
{
'You cannot add more guests to this event. If you have questions, please contact NFIB by calling the number provided in the event details or 1-800-NFIB-NOW.'
}
</Text>
)}
{displayAddButton && (
<View style={guestbtnStyle}>
<TextButton
title={'ADD A GUEST'}
color={v2Colors.green}
titleColor={v2Colors.white}
onPress={handleAddGuestButtonPress}
titleStyle={v2ButtonStyles.titleStyle}
/>
</View>
)}
</View>
</KeyboardAwareScrollView>
<View style={styles.footer}>
{!event.IsFree && (
<View style={styles.eventTotal}>
<Text style={styles.totalText}>{'Total'}</Text>
<Text style={[styles.totalText, {fontWeight: 'bold'}]}>
{`$${grandTotal}`}
</Text>
</View>
)}
<TouchableOpacity
style={styles.rowFooter}
onPress={handlePaymentsButtonPress}
>
{event.IsFree && (
<Text style={styles.footerBtnText}>{'REGISTER FOR EVENT'}</Text>
)}
{!event.IsFree && (
<Text style={styles.footerBtnText}>{'CONTINUE TO PAYMENT'}</Text>
)}
</TouchableOpacity>
</View>
</SafeAreaView>
);
};
当用户点击一次REGISTER FOR EVENT 时，它会从events/helpers/action-helpers 触发saveRegistration 异步函数：
export async function saveRegistration(
{ selectedEvent, registrationsData, paymentsData },
user
) {
try {
const numberOfSeats = getNumberOfSeats(registrationsData);
console.log("How many seats: ", numberOfSeats);
const isValid = await isCapacityValid(selectedEvent, numberOfSeats);
console.log("Are there still some seats left?", isValid);
// when REGISTER FOR EVENT is clicked, it does not fire the message below even though !isValid
if (!isValid) {
console.log("Clicked the button a second time: ", !isValid);
return Promise.reject({
Message:
"Thank you for your interest in this NFIB event. Currently, no seats are available. If you have questions, please contact NFIB by calling the number provided in the event description or 1-800-NFIB-NOW."
});
}
第一次单击时，它应该向用户提供您在上面在 Promise.reject 中看到的警报消息，但是直到用户第二次单击 REGISTER FOR EVENT 并且消息警报出现一秒钟后才会发生这种情况然后带有动画 gif 的 <Loading /> 组件无限期地运行并冻结应用程序。我无法确定哪个<Loading /> 组件在它正在运行的整个应用程序中运行，因为if 条件语句中有很多组件。我仍在处理它们，但有人知道会发生什么吗？
【问题讨论】：
标签： javascript react-native promise