I have a UITextField in a custom section header. There are multiple sections using this style of header, and therefore multiple UITextFields.
I have implemented the UITextFieldDelegate. When I edit one of these UITextFields, it calls the delegate method textFieldDidEndEditing. How do I determine which section header this UITextField was in? I need to save the value to core data in the appropriate NSManagedObject for that section.
Many thanks in advance
EDIT: Several people have suggested using a tag of the section number when creating the cell, which would work perfectly. However, I have already assigned the UITextField a tag to distinguish it as a 'header' textfield as opposed to a cell textfield or a 'footer' textfield. There are a whole lotta textfields on this table!!
Further EDIT: Using in indexPath has been suggested. This would be my preferred solution if I can get it to work. Does anyone know if headers and footers have indexPaths?
You could use tags to identify UITextField instances. Since you're already setting tags in UITextField instances, set the tags on the section views itself:
- (UIView *) tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section
{
UIView *sectionView = ... // your section view instance
// assign the section index as the tag
sectionView.tag = section;
return sectionView;
}
In the textfield delegate, get the section index from the sender's parent:
- (void) textFieldDidEndEditing:(UITextField *)textField;
{
NSInteger theSectionIndex = textField.superview.tag;
// your custom logic here
}
You would probably want to look into UITableView method indexPathForCell:.
You can get the cell through view hierarchy from your UITextField, since it's in your Cell's contentView.
Regards,
sven.
It is very simple Mr.Ben Thompson. You have named different between each one to UITextFields am i right?. Just find the specific UITextField by used it's name.
-(void) textFieldDidEndEditing:(UITextField *)textField
{
if (textField == textfieldOne)
{
//Do whatever you want...
}
else if (textField == textfieldTwo)
{
//Do whatever you want...
}
else if (textField == textfieldThree)
{
//Do whatever you want...
}
}
I hope it will help you a little bit. Thanks.
i believe you add the field as a custom view to the header in viewForHeader method of tableview.
I suggest keeping a tag of the field using the section like this.
textfield.tag == section;
then in the delegate message you can have a switch method to compare tags..and do your own code there
Related
I have 2 textFields side by side, countryCodeTextField and cellphoneTextField
On countryCodeTextField. I have an action selectCountry that happens on Edit Did Begin on the countryCodeTextField
- (IBAction)selectCountry:(id)sender {
countryCodeTextField.delegate = self;
[countryCodeTextField resignFirstResponder];
Note that self implements the <UITextFieldDelegate>.
Problem is when user click's cellphone the keyboard is displayed if he clicks on countryCodeTextField the keyboard is never dismissed.
If the person clicks the countryCode first then the keyboard never appears(which is what I want).
Why isn't the keyboard hidden when the user clicks cellphoneTextField first and then countryCodeTextField?
If you don't want the user to be able to edit a particular UITextField, set it to not be enabled.
UITextField *textField = ... // Allocated somehow
textfield.enabled = NO
Or just check the enabled checkbox in Interface Builder. Then the textfield will still be there and you'll be able to update it by configuring the text. But as sort of mentioned in comments, users expect UITextFields to be editable.
Also, why are you setting the delegate in the IBAction callback? I would think you'd be better off doing this in Interface Builder or when you create the UITextField in code.
EDIT:
Ok - so you want users to be able to select the box, but then bring up a custom subview(s) from which they select something which will fill the box.
So set the UITextField delegate when you create it (as mentioned above) and implement the following from the UITextFieldDelegate protocol:
- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField {
return NO;
}
to return NO. Note that if you are using the same delegate for both of your UITextFields, you will need to make this method return YES for the other field. For example, something like:
- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField {
if (textField == countryTextField)
return NO;
return YES;
}
Hopefully this should stop the keyboard being displayed - and now you have to work out how to fire your own subviews, which I'd suggest doing via an IBAction (touch up or something perhaps). You'll have to test various things out here, but remember you're kinda corrupting the point of UITextField and maybe it'll work and maybe it won't, and maybe it'll break in the next iOS upgrade.
Okay, so first, I think you shouldn't be using a UITextField. I think you should be using a UIButton and have the current value showing as the button's title. However, if you have your heart set on it, I would use our good friend inputView, a property on UITextField, and set that to your custom input view (which I assume is a UIPickerView or similar.)
This has the added bonus of not breaking your app horribly for blind and visually impaired users, something you should probably be aware of before you go messing about with standard behaviour.
In your method :
- (IBAction)textFieldDidBeginEditing: (UITextField *)textField
call this :
[textField becomeFirstResponder];
and apply checks for the two fields i.e., when textField is the countryCodeTextField write :
[textField resignFirstResponder];
and call your method :
[self selectCountry];
In this method display the list of country codes.
So Your code will be :
- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField {
return YES;
}
- (IBAction)textFieldDidBeginEditing: (UITextField *)textField{
[textField becomeFirstResponder];
if (textField == countryCodeTextField){
[textField resignFirstResponder];
[self selectCountry];
}
}
-(IBAction)selectCountry{
//display the list no need to do anything with the textfield.Only set text of TextField as the selected countrycode.
}
What I'm trying to do:
In a simple UITableView, I've got a form with both text and dates/times that can be edited. I'm using UITextFields in the date/time cells too, so that the inputView property can be used to display a datePicker over the keyboard.
What the problem is:
The problem with this is that these UITextFields are really just dummy fields that show a datePicker when selected. When they're selected, they show this annoying blue cursor that blinks - but these are just dummy text fields, and I don't want them to become visible at all.
If I set alpha = 0 or hidden = YES, then the textField no longer is clickable.
Any ideas of a way around this - or, a different solution to my initial problem? Thanks
I finally figured out a way around it. By hiding the UITextView, no touches are detected. However if I overlay a custom UIButton (which can be invisible) then I can activate the UITextField when the button is touched via
[myTextField becomeFirstResponder];
and then the datePicker will replace the keyboard just like it should.
I would use a UILabel with a UItapGestureRecognizer to know when the user taps on the label.
The text field control should only be used when actual text input is necessary.
Tell me if you need more help with the gesture recognizer, they are very easy to use and save you a lot of trouble.
To use the text field's "inputView" property, overlay your textfield on top of a label. Then simply hide and show the textfield from the textFieldDid* methods, but show the actual display value in the label.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
....
[cell.contentView addSubview:myLabel];
[cell.contentView addSubview:myTextField];
....
}
- (void)textFieldDidBeginEditing:(UITextField *)textField
{
if (textField == self.myTextField) {
[textField setHidden:YES];
}
}
- (void)textFieldDidEndEditing:(UITextField *)textField
{
if (textField == self.myTextField) {
[textField setHidden:NO];
}
}
- (void) pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
{
self.myLabel.text = #"Set value here";
}
See my answer here:
Disable blinking cursor in a UITextField
That will hide the cursor and give you the option of whether or not to display anything to the user.
I want to create expandable table view.
I found one link which is same as I want.
But I want to create my own table view (Dont want to implements this github code).
How do I achieve this type of functionality ?
See this nice tutorial:
Table View Animations and Gestures
Demonstrates how you can use animated updates to open and close sections of a table view for viewing, where each section represents a play, and each row contains a quotation from the play. It also uses gesture recognizers to respond to user input: * A UITapGestureRecognizer to allow tapping on the section headers to expand the section; * A UIPinchGestureRecognizer to allow dynamic changes to the height of table view rows; and * A UILongPressGestureRecognizer to allow press-and-hold on table view cells to initiate an email of the quotation.
I came across similar feature, to build it a rough algorithm will be:
implement the uitableviewdelgate and uitableviewdatasource protocols
create a global variable expandedSectionIndex = -1;
= -1 represents all collapsed.
= 0 represents expandedSectionIndex.
//the following protocol definitions will take care of which section is to be expanded.
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
if(expandedSectionIndex == section)
return [self.dataArray[section] count];
else
return 0;
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
if(self.dataArray)
return [self.dataArray count];
}
define custom header views in – tableView:viewForHeaderInSection:
buttons having frame equivalent to header view frame
set button tag property with value of section number.
associate all buttons with selector - (void)expand:(id) sender;
- (void)expand:(id) sender
{
expandedSectionIndex = [sender tag];
[self.tableView reload];
}
for more detail enter link description here
there are two different textfields in my applications and i set the .delegate property of both of them to: self.
Now i implemented different methods from the uitextfielddelegate protocol but i want to be able to control the two textfields individually. For instance i want the first text field to do something different when editing begins than the second textfield... Is the only solution to this problem to set the assign a different delegate or is there a way to do this with both of the textfield having the same delegate assigned to them?
I hope my question is understandable i tried it to explain the best way that i could.....
thanks in advance!
Set a tag on the textfield on initialization, then check the UITextField object that is passed into the delegate method's tag, then you'll be able to make a differentiation between the two textfields:
#define FIELD_ONE_TAG 1
#define FIELD_TWO_TAG 2
UITextField *textFieldOne = ...
textFieldOne.tag = FIELD_ONE_TAG;
...
UITextField *textFieldTwo = ...
textFieldTwo.tag = FIELD_TWO_TAG;
- (void)textFieldDidBeginEditing:(UITextField *)textField {
if(textField.tag == FIELD_ONE_TAG) { //field one
} else {//field two
}
}
UITextField *textFieldOne=.....
UITextField *textFieldTwo=....
- (void)textFieldDidBeginEditing:(UITextField *)textField {
if(textField == textFieldOne)
{ // field one code
}else{
//field two code
}
}
have two references of the inserted text views and u can compare them at the delegate methods. Not much needed with tags
What's the best way to determine which UITextField triggers the method -(BOOL)textFieldShouldBeginEditing:(UITextField *)textField (or any of the other UITextFieldDelegate methods)? I've seen code like this before:
- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField {
if (textField == textFieldCode) {
return YES;
}
return NO;
}
but this only works if I have textFieldCode as an ivar in my class, and in this case I'm just initializing a couple of UITextFields and putting them in a table, so I don't have references to them in the class.
I was thinking that I could use the hash function and store the hashes for each textField somewhere in the class, and then compare textField's hash to the desired hash in the method call, but that seems like kind of a hack.
Since you only have a couple of fields, you can assign unique numbers to the tag properties of each textfield to enable identification.
You can have an iVar of NSArray that will contain all the text fields.
Then just enumerate through it to find out which text field sent the message