New to objective c and this maybe a simple error. I am trying to dismiss all 3 UITextField keyboard which i have for UIPickerView. Whereby the keyboard won't appear only the picker view would be shown. I did some research but can't figure it out. Here is the code for the .m file and it won't work.
-(void)textFieldDidBeginEditing:(UITextField*)textField;
{
[textField resignFirstResponder];
modeArray = [[NSMutableArray alloc] init];
if(textField.tag==1){
[modeArray addObject:#" bus "];
[modeArray addObject:#" bus/mrt "];
tbMode.inputView = pickerView;
pickerView.hidden = NO;
}
else{
if(textField.tag==2){
[modeArray addObject:#" 300 "];
[modeArray addObject:#" 400 "];
[modeArray addObject:#" 500 "];
tbWalkDist.inputView = pickerView;
pickerView.hidden = NO;
}
else{
if(textField.tag==3){
[modeArray addObject:#" cheapest "];
[modeArray addObject:#" fastest "];
tbRouteOpt.inputView = pickerView;
pickerView.hidden = NO;
}
else{
pickerView.hidden=YES;
}
}
}
}
how should i dismiss the keyboard only showing the picker view? Using this line [textField resignFirstResponder]; can i use to dimiss the keyboard?
You need to delegate all your text fields to the viewController and then use the method;
-(BOOL)textFieldShouldReturn:(UITextField *)textField // called from textfield (keyboard)
{
//... place your [textField resignFirstResponder]; logic here
}
Make sure you add the text view delegate protocol to your viewcontroller .h file
#interface ViewController : UIViewController <UITextViewDelegate>
I don't understand your question clearly, but if you want this will hide the keyboard if you press return key :
- (BOOL)textFieldShouldReturn:(UITextField *)textField {
[textFieldName resignFirstResponder];
return YES;
}
Related
In my iOS App , i need to set custom inputView for UISearchBar in iOS7.
So i wrote following codes.
NSArray *searchBarSubViews = [[self.sBar.subviews objectAtIndex:0] subviews];
for(int i =0; i<[searchBarSubViews count]; i++) {
if([[searchBarSubViews objectAtIndex:i] isKindOfClass:[UITextField class]])
{
UITextField* search=(UITextField*)[searchBarSubViews objectAtIndex:i];
[search setFont:[UIFont fontWithName:#"CustomFont" size:15]];
search.delegate = self;
[search setInputView:self.customKeyboard];
[self.customKeyboard setTextView:search];
}
}
It is working fine. However when i type with my custom keyboard and tap Cancel Button to resignFirstResponder.
And i tap UISearchBar again, i can't type any text in UISearchBar , including native english keyboard.
And also Cancel Button is hiding and UISearchBar is not working anymore.
I don't know why is happening?
How can i solve it?
I tried your code and it's working fine with my app. In fact thanks and congratulations seem to be in order, because for one reason or other you seem to have solved a problem others on this site had to built more elaborate workarounds for.
In my app the keyboard changes according to the selected scope of the searchbar:
scope == 0 presents my CustomKeyboard
scope != 0 presents the usual iPhone Keyboard.
My implementation of your code looks like this:
-(UITextField *)textFieldFormSearchBar{
NSArray *searchBarSubViews = [[self.searchBar.subviews objectAtIndex:0] subviews];
for(int i =0; i<[searchBarSubViews count]; i++) {
if([[searchBarSubViews objectAtIndex:i] isKindOfClass:[UITextField class]])
{
UITextField* search=(UITextField*)[searchBarSubViews objectAtIndex:i];
return search;
}
}
return nil;
}
-(BOOL)searchBarShouldBeginEditing:(UISearchBar *)searchBar{
if (searchBar.selectedScopeButtonIndex==0) {
self.textFieldFormSearchBar.delegate = self;
self.textFieldFormSearchBar.inputView=self.customKeyboard;
self.customKeyboard.field=self.textFieldFormSearchBar;
}
else{
if (self.customKeyboard.superview!=nil) [self.customKeyboard removeFromSuperview];
self.textFieldFormSearchBar.delegate = self;
self.textFieldFormSearchBar.inputView=nil;
self.customKeyboard.field=nil;
}
return YES;
}
-(void)searchBar:(UISearchBar *)searchBar selectedScopeButtonIndexDidChange:(NSInteger)selectedScope{
if (selectedScope==0) {
self.textFieldFormSearchBar.delegate = self;
self.textFieldFormSearchBar.inputView=self.customKeyboard;
self.customKeyboard.field=self.textFieldFormSearchBar;
}
else{
if (self.customKeyboard.superview!=nil) [self.customKeyboard removeFromSuperview];
self.textFieldFormSearchBar.delegate = self;
self.textFieldFormSearchBar.inputView=nil;
self.customKeyboard.field=nil;
}
[self.textFieldFormSearchBar reloadInputViews];
}
-(BOOL)searchBarShouldEndEditing:(HDLSearchBar *)searchBar{
if (self.customKeyboard) {
[self.customKeyboard removeFromSuperview];
}
return [self.textFieldFormSearchBar resignFirstResponder];
}
Probably not the most efficient way to do it, but it does the trick. I hope you'll find something that helps you solve your problem.
I have a problem with my pickerview where by clicking on the textfield it shows an empty uipickerview. I have 3 textfield where by clicking on each textfield there will be different array for each one.
Here's the code:
- (void)viewDidLoad
{
[super viewDidLoad];
tbMode.inputView = pickerView;
tbWalkDist.inputView = pickerView;
tbRouteOpt.inputView = pickerView;
}
-(BOOL)textFieldShouldReturn:(UITextField *)textField {
[textField resignFirstResponder];
return YES;
}
-(void)textFieldDidBeginEditing:(UITextField*)textField;
{
modeArray = [[NSMutableArray alloc] init];
if(textField.tag==1){
[modeArray addObject:#" A "];
[modeArray addObject:#" B "];
pickerView.hidden = NO;
}
else{
if(textField.tag==2){
[modeArray addObject:#" 300 "];
[modeArray addObject:#" 400 "];
[modeArray addObject:#" 500 "];
pickerView.hidden = NO;
}
else{
if(textField.tag==3){
[modeArray addObject:#" cheapest "];
[modeArray addObject:#" fastest "];
pickerView.hidden = NO;
}
else{
pickerView.hidden=YES;
}
}
}
}
- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView;
{
return 1;
}
- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent: (NSInteger)component
{
tbMode.text = [modeArray objectAtIndex:row];
}
- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component;
{
return [modeArray count];
}
- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component;
{
return [modeArray objectAtIndex:row];
}
pls help! where did i got wrong? is it possible that this method -(void)textFieldDidBeginEditing:(UITextField*)textField; is not called? thanks
edit* i miss out these 3 line of line which is for each textfield which use to call that method in viewDidLoad
tbMode.delegate = self;
tbWalkDist.delegate = self;
tbRouteOpt.delegate = self;
But I'm still getting an empty picker view. how can i add these NSMutableArray into the the picker view
*add in [pickerView reloadAllComponents]; the picker will display the values :)
I don't see here where you initialize the pickerView ivar. Can I assume it is created in xib?
If so, make sure you have connected the iBOutlet and set up its delegate and datasource property to be the "file owner" or view controller as it were.
If you create the picker in the init method, post that code so we can see if those properties are set correctly.
You also must have set your controller as the delegate for the uiTextField.
Additionally, if they are not implemented elsewhere, you are missing these required protocols:
– pickerView:rowHeightForComponent:
– pickerView:widthForComponent:
As for your output problem, you need to keep track of the uiTextField that activated. Add an ivar,
uiTextField *activeField;
set the variable to the appropriate uiTextField object in the textfield delegate method. Then replace,
tbMode.text = [modeArray objectAtIndex:row];
with,
activeField.txt = [modeArray objectAtIndex:row];
Set the ivar like so:
-(void)textFieldDidBeginEditing:(UITextField*)textField
{
activeField = textField;
// all the if else logic here
}
Try [pickerView reloadAllComponents] after setting the new data set.
I've been having a ton of issues with this section of an app that I'm writing, I'm sure people here are getting sick of me so I'm going to try and solve all my questions in this post. I'm working on an app that behaves like a photo gallery, and I'm implementing the option to have the user delete photos from their gallery. To accomplish this, I decided to place an invisible button over each picture. When the user hits an "Edit" button, the hidden delete buttons over each picture become active. I'm using the same IBOutlet over each of the hidden buttons for simplicity, and I've tagged each button appropriately in Interface Builder. When the user taps the button over the picture, an alert view appears asking if they really want to delete it. If they click yes, I call removeObjectAtIndex and delete the image from the UI. But, when I click "Yes" in the alert view, I get an error from Xcode stating:
2012-04-04 11:26:40.484 AppName[608:f803] -[UIButton setImage:]: unrecognized selector sent to instance 0x6a922c0
2012-04-04 11:26:40.485 AppName[608:f803] Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UIButton setImage:]: unrecognized selector sent to instance 0x6a922c0'*
I've been trying to figure out what is causing this for a few hours now to no avail. I'm not setting the image of a UIButton anywhere in my code. I did in IB, but I simply set the buttons types to Custom so that they appear invisible. I will post my entire file below, I can't find any issues in my code, so any help is much appreciated! Thanks.
EDIT Here is the current version of the code:
- (IBAction)grabImage {
self.imgPicker = [[UIImagePickerController alloc] init];
self.imgPicker.delegate = self;
self.imgPicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPad) {
_popover = [[UIPopoverController alloc] initWithContentViewController:imgPicker];
[_popover presentPopoverFromRect:self.imageView.bounds inView:self.imageView permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
}
else {
[self presentModalViewController:imgPicker animated:YES];
}
[self.imgPicker resignFirstResponder];
}
// Sets the image in the UIImageView
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)img editingInfo:(NSDictionary *)editInfo {
if (imageView.image == nil) {
imageView.image = img;
self.array = [NSMutableArray arrayWithObject:[NSData dataWithData:UIImagePNGRepresentation(imageView.image)]];
[picker dismissModalViewControllerAnimated:YES];
[self.popover dismissPopoverAnimated:YES];
return;
}
if (imageView2.image == nil) {
imageView2.image = img;
NSLog(#"The image is a %#", imageView);
[self.array addObject:[NSData dataWithData:UIImagePNGRepresentation(imageView2.image)]];
[picker dismissModalViewControllerAnimated:YES];
[self.popover dismissPopoverAnimated:YES];
return;
}
if (imageView3.image == nil) {
imageView3.image = img;
[self.array addObject:[NSData dataWithData:UIImagePNGRepresentation(imageView3.image)]];
[picker dismissModalViewControllerAnimated:YES];
[self.popover dismissPopoverAnimated:YES];
return;
}
if (imageView4.image == nil) {
imageView4.image = img;
[self.array addObject:[NSData dataWithData:UIImagePNGRepresentation(imageView4.image)]];
[picker dismissModalViewControllerAnimated:YES];
[self.popover dismissPopoverAnimated:YES];
return;
}
}
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
self.title = NSLocalizedString(#"Photo Gallery", #"Photo Gallery");
self.tabBarItem.image = [UIImage imageNamed:#"42-photos.png"];
}
return self;
}
////start of saving////
- (void)applicationDidEnterBackground:(UIApplication*)application {
NSLog(#"Image on didenterbackground: %#", imageView);
self.array = [NSMutableArray arrayWithObject:[NSData dataWithData:UIImagePNGRepresentation(imageView.image)]];
[self.array addObject:[NSData dataWithData:UIImagePNGRepresentation(imageView2.image)]];
[self.array addObject:[NSData dataWithData:UIImagePNGRepresentation(imageView3.image)]];
[self.array addObject:[NSData dataWithData:UIImagePNGRepresentation(imageView4.image)]];
[self.user setObject:self.array forKey:#"images"];
[user synchronize];
}
- (void)viewDidLoad
{
self.user = [NSUserDefaults standardUserDefaults];
NSLog(#"It is %#", self.user);
self.array = [[self.user objectForKey:#"images"]mutableCopy];
imageView.image = [[UIImage alloc] initWithData:[self.array objectAtIndex:0]];
imageView2.image = [[UIImage alloc] initWithData:[self.array objectAtIndex:1]];
imageView3.image = [[UIImage alloc] initWithData:[self.array objectAtIndex:2]];
imageView4.image = [[UIImage alloc] initWithData:[self.array objectAtIndex:3]];
UIApplication *app = [UIApplication sharedApplication];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(applicationDidEnterBackground:)
name:UIApplicationDidEnterBackgroundNotification
object:app];
backToGalleryButton.hidden = YES;
tapToDeleteLabel.hidden = YES;
deleteButton1.hidden = YES;
[super viewDidLoad];
}
///// shows the hidden and invisible "delete" button over each photo.
- (IBAction)editButtonPressed:(id)sender {
grabButton.hidden = YES;
editButton.hidden = YES;
backToGalleryButton.hidden = NO;
tapToDeleteLabel.hidden = NO;
deleteButton1.hidden = NO;
}
////
// This is when the user taps on the image to delete it.
- (IBAction)deleteButtonPressed:(id)sender {
NSLog(#"Sender is %#", sender);
UIAlertView *deleteAlertView = [[UIAlertView alloc] initWithTitle:#"Delete"
message:#"Are you sure you want to delete this photo?"
delegate:self
cancelButtonTitle:#"No"
otherButtonTitles:#"Yes", nil];
[deleteAlertView show];
int imageIndex = ((UIButton *)sender).tag;
deleteAlertView.tag = imageIndex;
}
- (void)alertView: (UIAlertView *) alertView
clickedButtonAtIndex: (NSInteger) buttonIndex
{
if (buttonIndex != [alertView cancelButtonIndex]) {
NSLog(#"User Clicked Yes. Deleting index %d of %d", alertView.tag, [array count]);
NSLog(#"The tag is %i", alertView.tag);
[self.array removeObjectAtIndex: alertView.tag];
NSLog(#"After deleting item, array count = %d", [array count]);
NSLog(#"Returned view is :%#, in view: %#", [self.view viewWithTag:alertView.tag], self.view);
((UIImageView *)[self.view viewWithTag:alertView.tag]).image =nil;
}
[self.user setObject:self.array forKey:#"images"];
}
Update: I added breakpoints, and discovered that ((UIImageView *)[self.view viewWithTag:alertView.tag]).image =nil; is the line that is causing the crash, I still can't figure out why though.
I don't see setImage: being called in any of that code you pasted into your question, but I can tell you this: UIButton's setImage method actually requires a button state as a second parameter.
e.g.
[UIButton setImage: forState:]
I've linked Apple's documentation for you.
If your calls to setImage: don't have a second parameter, that would explain the "unrecognized selector error" you're seeing.
This is an extension to #MichaelDautermann , who makes a very good point that a UIButton has a setImage:forState: method, but no setImage method. However, you ARE calling set image. Not on a button, but when you say imageView.image and imageView2.image. This invokes the setter method for the image view. I would set a breakpoint (or use NSLog and the %# item) to ensure that imageView is in fact an imageView and not a button. If it somehow changed from under you, this could be causing the issue. Simply set a break point at those two lines and see if you even make it past them.
Additionally, if Xcode isn't popping you over to which line is actually causing the issue, check your crash logs. Symbolicated, the log will give you the line number. Or, a less direct approach would be to set breakpoints at the ends of the methods you provided in your answer, and see how many you get past. Once you crash, you can narrow down which method is causing you grief, and then start setting break points within the method until you get to the line in question.
UPDATE:
You said in the comments that ((UIImageView *)[self.view viewWithTag:alertView.tag]).image =nil is what you have, but self.view is a UIControl. Changing the cast won't affect the result. Is the UIImageView whose image you are trying to delete a subview of a UIControl? If not, you're never going to get the image view back from viewWithTag. Generally, self.view refers to a view controller's view, so if you're getting a UIControl, my assumption is either your whole view is a UIControl, or you're doing this in the wrong class. Which class are you doing this in, and what is it a subclass of? It appears you are doing this in a view controller, but I just want to be sure. And again, in either case (UIControl or UIImageView), neither class responds to setImage.
I have a class that makes a keyboard toolbar which has "Next", "Previous", and "Done" buttons on it. Is there a way for this class to know (or find out) what objects are on the screen at any time?
E.g., can it see what the current view is and what the text fields on it are, and then be able to resign the first responder?
If you specifically want to resign first responder without the need to known which view is the first responder you can send resignFirstResponder to "nil" like this:
[[UIApplication sharedApplication] sendAction:#selector(resignFirstResponder) to:nil from:nil forEvent:nil];
This is documented behaviour although I cannot find in the docs right now.
Is there a way for this class to know
(or find out) what objects are on the
screen at the time?
Find the momma view and you can iterate through all the objects on the screen (because they will be UIViews too) like this. Note that you may need to add recursion:
for (UIView *view in mommaView.subviews) {
do something to the view
}
You can start at the Window class and go down from there, asking [view respondsTo:#selector(isFirstResponder) && [view isFirstResponder] on each. Some debugging code that I use might come in handy as a template and also while debugging:
+ (void) dumpWindowFrom:(NSString *) fromText {
[self dumpViews:[[UIApplication sharedApplication] keyWindow] from:fromText];
}
void dumpViewsRecursive(UIView* view, NSString *text, NSString *indent)
{
Class cl = [view class];
NSString *classDescription = [cl description];
// while ([cl superclass]) //restore to print superclass list
// {
// cl = [cl superclass];
// classDescription = [classDescription stringByAppendingFormat:#":%#", [cl description]];
// }
if ([text compare:#""] == NSOrderedSame)
NSLog(#"%d: %# %# %#", (int)view, classDescription, NSStringFromCGRect(view.frame), view.hidden ? #"Inv" : #"Vis");
else
NSLog(#"%d: %# %# %# %#", (int)view, text, classDescription, NSStringFromCGRect(view.frame), view.hidden ? #"Inv" : #"Vis");
for (NSUInteger i = 0; i < [view.subviews count]; i++)
{
UIView *subView = [view.subviews objectAtIndex:i];
NSString *newIndent = [[NSString alloc] initWithFormat:#" %#", indent];
NSString *msg = [[NSString alloc] initWithFormat:#"%#%d:", newIndent, i];
dumpViewsRecursive (subView, msg, newIndent);
[msg release];
[newIndent release];
}
}
+ (void) dumpViews: (UIView *) view {
dumpViewsRecursive (( (!view) ? [[UIApplication sharedApplication] keyWindow] : view), #"" ,#"");
}
+ (void) dumpViews: (UIView *) view from:(NSString *) fromText{
dumpViewsRecursive ((!view) ? [[UIApplication sharedApplication] keyWindow] : view, fromText, #"");
}
yes, the methods provided below will be called whenever a textField becomes Active. I think you are looking for
- (BOOL) textFieldShouldReturn:(UITextField *)textField
{
[textField resignFirstResponder];
return 1;
}
or
- (void) textFieldDidBeginEditing:(UITextField *)textField
{
[textField resignFirstResponder];
}
- (void) textFieldDidEndEditing:(UITextField *)textField
{
[textField resignFirstResponder];
}
and if you are looking for a specific textField in your view, you should assign them tags:
textField.tag =1 // for textField 1
textField.tag =2 // for textField 2
// You may check for these tags and then resign specific ones.
The below code shows that when a user does a long press gesture on a Table View Cell, then a UIActionSheet launches with a UITextField inside of it. When tapping the UITextField, the keyboard launches, and textFieldShouldBeginEditing and textFieldDidBeginEditing get called, but the text field won't accept the key taps.
Hitting the return key won't trigger the delegate methods, but tapping one of the UIActionSheet buttons will trigger textFieldShouldEndEditing and then textFieldDidEndEditing.
I'm setting the textField to become the first responder, so I'm not sure why it's not accepting input from the keyboard. Any suggestions?
- (void)longPress:(UILongPressGestureRecognizer *)gesture
{
// only when gesture was recognized, not when ended
if (gesture.state == UIGestureRecognizerStateBegan)
{
// get affected cell
SinTableViewCell *cell = (SinTableViewCell *)[gesture view];
// get indexPath of cell
NSIndexPath *indexPath = [self.tableView indexPathForCell:cell];
// do something with this action
NSLog(#"Long-pressed cell at row %d", indexPath);
AppDelegate_Shared *appDelegate = (AppDelegate_Shared*)[UIApplication sharedApplication].delegate;
//setup UITextField for the UIActionSheet
UITextField *textField = [[UITextField alloc] initWithFrame:CGRectMake(0, 170, 320, 200)];
textField.borderStyle = UITextBorderStyleBezel;
textField.backgroundColor = UIColorFromRGB(0XFFFFFF);
textField.text = #"";
textField.delegate = self;
[textField setKeyboardType:UIKeyboardTypeAlphabet];
[textField setKeyboardAppearance:UIKeyboardAppearanceAlert];
//setup UIActionSheet
UIActionSheet *asheet = [[UIActionSheet alloc] initWithTitle:#"Add Notes"
delegate:self
cancelButtonTitle:#"Cancel"
destructiveButtonTitle:nil
otherButtonTitles: #"Save", nil];
[asheet showFromTabBar:appDelegate.tabBarController.tabBar];
[asheet setFrame:CGRectMake(0, 100, 320,380)];
[asheet insertSubview:textField atIndex:0];
//[textField becomeFirstResponder];
//memory management
[textField release];
[asheet release];
}
}
#pragma mark -
#pragma mark UIActionSheetDelegate
- (void)actionSheet:(UIActionSheet *)actionSheet willDismissWithButtonIndex:(NSInteger)buttonIndex {
}
- (void)actionSheet:(UIActionSheet *)actionSheet didDismissWithButtonIndex:(NSInteger)buttonIndex {
}
#pragma mark -
#pragma mark UITextFieldDelegate
- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField {
NSLog(#"textFieldShouldBeginEditing");
return YES;
}
- (void)textFieldDidBeginEditing:(UITextField *)textField {
NSLog(#"textFieldDidBeginEditing");
[textField becomeFirstResponder];
}
- (BOOL)textFieldShouldEndEditing:(UITextField *)textField {
NSLog(#"textFieldShouldEndEditing");
return YES;
}
//should save the notes value here, I think
- (void)textFieldDidEndEditing:(UITextField *)textField {
NSLog(#"textFieldDidEndEditing");
[textField resignFirstResponder];
}
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string{
return YES;
}
- (BOOL)textFieldShouldClear:(UITextField *)textField {
NSLog(#"textFieldShouldClearEditing");
return YES;
}
- (BOOL)textFieldShouldReturn:(UITextField *)textField {
NSLog(#"in textFieldShouldReturn");
return YES;
}
Your question is a little bit old but not marked as answered, so if it is helpful for you or other viewers I post my solution from my own SO question. I started up with the same problem as you had and ended up in the fact that UIActionSheet really eats up some important events which are necessary to get the keyboard working properly.
My linked posted code unfortunately works only in portrait orientation, anyway it does it.
Is UITextFieldDelegate and UIActionSheetDelegate in your header?
If not, there could be problems while setting the textfield.delegate to self