How to delete UITextfield on tap? - xcode

Question

I have a program that when I tap the view a UITextField will appear. I also have an Undo-Button. I wanted to make a delete function when I double tap the UITextfield it can be deleted. Please Help Me.
Here is my code:
ViewController.h
#import <UIKit/UIKit.h>
#import <QuartzCore/QuartzCore.h>
#interface ViewController : UIViewController<UITextFieldDelegate, UIGestureRecognizerDelegate>
{
NSMutableArray *textfieldform;
UITextField *textField1;
float angle;
CGFloat beginX;
CGFloat beginY;
IBOutlet UIView *blahBlah;
CGPoint prevPanPoint;
float prevPinchScale;
float prevRotation;
}
#property (nonatomic, retain) NSMutableArray *textfieldform;
-(IBAction) undo;
- (IBAction)handleTap2:(UITapGestureRecognizer *)recognizer;
#end
ViewController.m
#import "ViewController.h"
#interface ViewController ()
#end
#implementation ViewController
#synthesize text1, textfieldform;
- (void)viewDidLoad
{
[super viewDidLoad];
//textfieldform = [[NSMutableArray alloc] init];
// Do any additional setup after loading the view, typically from a nib.
textfieldform = [NSMutableArray arrayWithCapacity:0];
angle = 180;
UIPinchGestureRecognizer *pinchGesture = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:#selector(scaleImage:)];
[blahBlah addGestureRecognizer:pinchGesture];
UIRotationGestureRecognizer *rotationGesture = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:#selector(rotateImage:)];
[blahBlah addGestureRecognizer:rotationGesture];
UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc] initWithTarget:self action:#selector(panGestureAction:)];
[pan setMaximumNumberOfTouches:1];
[pan setMinimumNumberOfTouches:1];
[blahBlah addGestureRecognizer:rotationGesture];
UITapGestureRecognizer *twoFingersTwoTaps =
[[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(twoFingersTwoTaps)] ];
[twoFingersTwoTaps setNumberOfTapsRequired:2];
[twoFingersTwoTaps setNumberOfTouchesRequired:2];
[blahBlah addGestureRecognizer:twoFingersTwoTaps];
}
- (void)twoFingersTwoTaps {
NSLog(#"Action: Delete text, two taps");
}
-(void)panGestureAction:(UIPanGestureRecognizer *)pan {
if (pan.state == UIGestureRecognizerStateBegan){
prevPanPoint = [pan locationInView:blahBlah];
}
CGPoint curr = [pan locationInView:blahBlah];
float diffx = curr.x - prevPanPoint.x;
float diffy = curr.y - prevPanPoint.y;
CGPoint centre = textField1.center;
centre.x += diffx;
centre.y += diffy;
textField1.center = centre;
prevPanPoint = curr;
}
-(BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer{
return YES;
}
-(BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch{
if([touch.view isKindOfClass:[UIView class]]) {
return YES;
}
return NO;
}
- (void)scaleImage:(UIPinchGestureRecognizer *)recognizer
{
if (recognizer.state == UIGestureRecognizerStateBegan)
prevPinchScale = 1.0;
float thisScale = 1 + (recognizer.scale-prevPinchScale);
prevPinchScale = recognizer.scale;
textField1.transform = CGAffineTransformScale(textField1.transform, thisScale, thisScale);
}
- (void)rotateImage:(UIRotationGestureRecognizer *)recognizer
{
if([recognizer state] == UIGestureRecognizerStateEnded) {
prevRotation = 0.0;
}
float thisRotate = recognizer.rotation - prevRotation;
prevRotation = recognizer.rotation;
textField1.transform = CGAffineTransformRotate(textField1.transform, thisRotate);
}
-(IBAction)undo{
UITextField *textFieldToRemove = [textfieldform lastObject];
if (textFieldToRemove) {
[textfieldform removeObject:textFieldToRemove];
[textFieldToRemove removeFromSuperview];
}
}
- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField{
NSLog(#"textFieldShouldBeginEditing");
return YES;
}
- (void)textFieldDidBeginEditing:(UITextField *)textField{
NSLog(#"textFieldDidBeginEditing");
[textField1 setBackgroundColor:[UIColor colorWithRed:(248/255.0) green:(248/255.0) blue:(255/255.0) alpha:1.0]];
textField1.borderStyle = UITextBorderStyleRoundedRect;
}
- (BOOL)textFieldShouldEndEditing:(UITextField *)textField{
NSLog(#"textFieldShouldEndEditing");
textField.backgroundColor = [UIColor clearColor];
return YES;
}
- (void)textFieldDidEndEditing:(UITextField *)textField{
NSLog(#"textFieldDidEndEditing");
[textField1 setBackgroundColor:[UIColor clearColor]];
textField1.borderStyle = UITextBorderStyleNone;
}
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string{
NSLog(#"textField:shouldChangeCharactersInRange:replacementString:");
if ([string isEqualToString:#"#"]) {
return NO;
}
else {
return YES;
}
}
- (BOOL)textFieldShouldClear:(UITextField *)textField{
NSLog(#"textFieldShouldClear:");
return YES;
}
- (BOOL)textFieldShouldReturn:(UITextField *)textField{
NSLog(#"textFieldShouldReturn:");
if (textField.tag == textfieldform.count) {
textField1 = (UITextField *)[self.view viewWithTag:textfieldform.count];
[textField1 becomeFirstResponder];
}
else {
[textField resignFirstResponder];
}
return YES;
}
- (IBAction)handleTap2:(UITapGestureRecognizer *)recognizer{
if (recognizer.state == UIGestureRecognizerStateEnded){
CGPoint point = [recognizer locationInView:[self view]];
textField1 = [[UITextField alloc] init];
textField1.borderStyle = UITextBorderStyleLine;
textField1.font = [UIFont systemFontOfSize:15];
CGRect frame ;
frame.origin.x = point.x;
frame.origin.y = point.y;
frame.size.width=300;
frame.size.height=40;
textField1.frame=frame;
textField1.autocorrectionType = UITextAutocorrectionTypeNo;
textField1.keyboardType = UIKeyboardTypeDefault;
textField1.returnKeyType = UIReturnKeyDefault;
textField1.clearButtonMode = UITextFieldViewModeWhileEditing;
textField1.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter;
textField1.delegate = self;
textField1.tag = textfieldform.count;
textField1.font = [UIFont fontWithName:#"Arial" size:30];
[textfieldform addObject:textField1];
[blahBlah addSubview:textField1];
[textField1 addTarget:self action:#selector(wasDragged:withEvent:) forControlEvents:UIControlEventTouchDragInside];
}
}
- (void)wasDragged:(UIButton *)button withEvent:(UIEvent *)event{
// get the touch
UITouch *touch = [[event touchesForView:textField1] anyObject];
// get delta
CGPoint previousLocation = [touch previousLocationInView:textField1];
CGPoint location = [touch locationInView:textField1];
CGFloat delta_x = location.x - previousLocation.x;
CGFloat delta_y = location.y - previousLocation.y;
// move button
textField1.center = CGPointMake(textField1.center.x + delta_x,textField1.center.y + delta_y);
}
- (void)moveImage:(UIPanGestureRecognizer *)recognizer
{
CGPoint newCenter = [recognizer translationInView:self.view];
if([recognizer state] == UIGestureRecognizerStateBegan) {
beginX = textField1.center.x;
beginY = textField1.center.y;
}
newCenter = CGPointMake(beginX + newCenter.x, beginY + newCenter.y);
[textField1 setCenter:newCenter];
}
- (void)viewDidUnload{
[super viewDidUnload];
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation{
return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
}
#end

Answer 1

UITextField *textFieldToRemove = [textfieldform objectAtIndex:0];
if (textFieldToRemove) {
NSLog(#"baaaaaaam! remove %i", textfieldform.count);
[textfieldform removeObject:textFieldToRemove];
[textFieldToRemove removeFromSuperview];
}
I kinda Figured it out. :)