【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。
@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？
标签： ios objective-c iphone uitextview uitextviewdelegate