如何清除 VENToken 中的文本？

Posted 2023-02-24

【中文标题】如何清除 VENToken 中的文本？

【英文标题】：How to clear text inside VENToken?

【发布时间】：2016-10-24 11:30:05

【问题描述】：

我使用VENTokenField github 库作为收件人电子邮件。现在用户输入电子邮件，并用逗号（，）分隔。一切正常。我的问题是当用户按下提交按钮时如何清除文本。

1)http://imgur.com/a/ObbaB

2)http://imgur.com/a/DCusg

@property (strong, nonatomic) NSMutableArray *inviteFriendNames;
self.inviteFriendNames = [[NSMutableArray alloc]init];

#pragma mark - VENTokenFieldDataSource

- (NSString *)tokenField:(VENTokenField *)tokenField titleForTokenAtIndex:(NSUInteger)index

    if (self.inviteFriendNames.count > index) 
        return self.inviteFriendNames[index];
    
    return @"";


- (NSUInteger)numberOfTokensInTokenField:(VENTokenField *)tokenField

    return self.inviteFriendNames.count;



#pragma mark - VENTokenFieldDelegate

- (void)tokenField:(VENTokenField *)tokenField didEnterText:(NSString *)text


    if (![self.inviteFriendNames containsObject:text]) 
        self.inviteFriendNames = (NSMutableArray*)[self.inviteFriendNames arrayByAddingObject:text];
        [self chosenContactsHasChanged];
    

    return;


- (void)tokenField:(VENTokenField *)tokenField didDeleteTokenAtIndex:(NSUInteger)index


    if (self.inviteFriendNames.count > index) 

        NSMutableArray *mutable = [self.inviteFriendNames mutableCopy];
        [mutable removeObjectAtIndex:index];
        self.inviteFriendNames = mutable;

        [self chosenContactsHasChanged];
    

    self.tokenField.placeholderText = NSLocalizedString(@"Email", nil);
    [self chosenContactsHasChanged];


- (void)tokenField:(VENTokenField *)tokenField didChangeText:(NSString *)text

   if ([text hasSuffix:@" "]) 
        // Trim off the comma
        text = [text stringByTrimmingCharactersInSet:[NSCharacterSet characterSetWithCharactersInString:@"  "]];
        [self tokenField:tokenField didEnterText:text];

     else 

        return;
    



- (void)updateContactTokenFieldHeightConstraint

    CGFloat heightOfTokens = self.tokenField.tokenScrollViewHeight + tokenFieldHeightPadding;
    CGFloat newHeight = MAX(tokenFieldMinHeight, heightOfTokens);
    self.tokenFieldHeight.constant = newHeight;
    [self layoutIfNeeded];



- (void)chosenContactsHasChanged

    [self.tokenField reloadData];
    [self updateContactTokenFieldHeightConstraint];

pragma mark - UIButton Action

-(IBAction)inviteButtonAction:(id)sender


    [self endEditing:YES];

    if (self.inviteFriendNames.count == 0) 

        [[PCAlertUtility sharedInstance]showOkAlertWithTitle:nil description:@"Please enter the mail id." completion:nil];
    else

        NSString *senderName = [NSString stringWithFormat:@"%@.%@",[APPDELEGATE.defaults valueForKey:@"firstName"],[APPDELEGATE.defaults valueForKey:@"lastName"]];

        NSDictionary *sendData = @@"name":senderName,@"emails":inviteFriendNames;

        [self.inviteVC sendInviationAPI:INVITE_FRIENDS withParameter:sendData];

    

pragma mark - 到邀请

-(void)sendInviationAPI:(NSString *)url withParameter:(NSDictionary *)parameters

    // To Check Network Available or Unavailable
    if (![PCCommonUtility checkForNetwork]) 

        [[PCAlertUtility sharedInstance]showOkAlertWithTitle:[LocalizedStrings warning] description:[LocalizedStrings networkFailure] completion:nil];

    else

        [MBProgressHUD showHUDAddedTo:self.view animated:YES];

        // To Check Access token is null or empty
        if ([APPDELEGATE.defaults valueForKey:CURRENT_TOKEN] && ![[APPDELEGATE.defaults valueForKey:CURRENT_TOKEN]isKindOfClass:[NSNull class]]) 

            [PCAPIUtility getResponseFromAPI:url withParameters:parameters withSuccess:^(NSMutableArray *responseData, NSString *success) 

                DLog(@"InviteSuccess:%@",responseData);

                NSString *status = [NSString stringWithFormat:@"%@",[responseData valueForKey:@"status"]];
                NSString *message = [NSString stringWithFormat:@"%@",[responseData valueForKey:@"message"]]

if ([status isEqualToString:@"1"]) 

                    [MBProgressHUD hideHUDForView:self.view animated:YES];
                    [[PCAlertUtility sharedInstance]showOkAlertWithTitle:nil description:message completion:^(BOOL confirm) 
                        if (!confirm) 


                            [self.inviteView.inviteFriendNames removeAllObjects];
                            [self.inviteView.tokenField reloadData];

                        
                    ];
                else

                    [MBProgressHUD hideHUDForView:self.view animated:YES];
                    [[PCAlertUtility sharedInstance]showOkAlertWithTitle:nil description:message completion:nil];
                

             orFailure:^(NSError *error) 

                DLog(@"InviteFailure:%@",error.description);
                [MBProgressHUD hideHUDForView:self.view animated:YES];
                [[PCAlertUtility sharedInstance]showOkAlertWithTitle:nil description:[LocalizedStrings networkFailure] completion:nil];
            ];

        else

            NSLog(@"Access Token is Empty");
            [MBProgressHUD hideHUDForView:self.view animated:YES];
        
    

【问题讨论】：

inputTextField.text = @"";

github.com/venmo/VENTokenField/tree/master/VENTokenField你正在使用这个库，所以当你警告显示和它的显示明文时只写一行。

这个我也试了，但是不行

试试我的答案并告诉我它是否有效？

【参考方案1】：

在 ViewController 类中，

.h

@protocol DelegateMethod <NSObject>

-(void)removeArray;

@end

@interface ViewController : UIViewController

@property (nonatomic, strong) id <DelegateMethod> delegate;

@end

.m

-(void)sendInviationAPI:(NSString *)url withParameter:(NSDictionary *)parameters

    // To Check Network Available or Unavailable
    if (![PCCommonUtility checkForNetwork]) 

        [[PCAlertUtility sharedInstance]showOkAlertWithTitle:[LocalizedStrings warning] description:[LocalizedStrings networkFailure] completion:nil];

    else

        [MBProgressHUD showHUDAddedTo:self.view animated:YES];

        // To Check Access token is null or empty
        if ([APPDELEGATE.defaults valueForKey:CURRENT_TOKEN] && ![[APPDELEGATE.defaults valueForKey:CURRENT_TOKEN]isKindOfClass:[NSNull class]]) 

            [PCAPIUtility getResponseFromAPI:url withParameters:parameters withSuccess:^(NSMutableArray *responseData, NSString *success) 

                DLog(@"InviteSuccess:%@",responseData);

                NSString *status = [NSString stringWithFormat:@"%@",[responseData valueForKey:@"status"]];
                NSString *message = [NSString stringWithFormat:@"%@",[responseData valueForKey:@"message"]]

    if ([status isEqualToString:@"1"]) 

                    [MBProgressHUD hideHUDForView:self.view animated:YES];
                    [[PCAlertUtility sharedInstance]showOkAlertWithTitle:nil description:message completion:^(BOOL confirm) 
                        if (!confirm) 

                            [self.delegate removeArray];

                        
                    ];
                else

                    [MBProgressHUD hideHUDForView:self.view animated:YES];
                    [[PCAlertUtility sharedInstance]showOkAlertWithTitle:nil description:message completion:nil];
                

             orFailure:^(NSError *error) 

                DLog(@"InviteFailure:%@",error.description);
                [MBProgressHUD hideHUDForView:self.view animated:YES];
                [[PCAlertUtility sharedInstance]showOkAlertWithTitle:nil description:[LocalizedStrings networkFailure] completion:nil];
            ];

        else

            NSLog(@"Access Token is Empty");
            [MBProgressHUD hideHUDForView:self.view animated:YES];
        
    

在视图类中

邀请按钮操作

-(IBAction)inviteButtonAction:(id)sender

    [self endEditing:YES];

    if (self.inviteFriendNames.count == 0) 

        [[PCAlertUtility sharedInstance]showOkAlertWithTitle:nil description:@"Please enter the mail id." completion:nil];
    else

        NSString *senderName = [NSString stringWithFormat:@"%@.%@",[APPDELEGATE.defaults valueForKey:@"firstName"],[APPDELEGATE.defaults valueForKey:@"lastName"]];

        NSDictionary *sendData = @@"name":senderName,@"emails":inviteFriendNames;
        [self.inviteVC setDelegate:self];
        [self.inviteVC sendInviationAPI:INVITE_FRIENDS withParameter:sendData];

    


-(void)removeArray 

    [self.inviteFriendNames removeAllObjects];
    [self.tokenField reloadData];

【讨论】：

我从数组中删除所有对象时遇到异常

'removeAllObjects' 在调用邀请 API 服务后。不要一开始就删除并将一个空数组发送到您的服务器。

我将值发送到 API 并在我 removeAllObjects 之后得到成功的响应

您仍然面临问题吗？

是的，我仍然面临这个问题，我已经更新了我的代码。请检查