I'm just adding a quick intro screen with a button, which compiles and displays properly, but my button doesn't respond.
- (void)viewDidLoad {
[super viewDidLoad];
NSLog(#"viewDidLoad!");
[self showIntro];
}
// make a quick Intro screen
- (void) showIntro {
UIImageView *myBackImage = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 320, 460)];
[myBackImage setImage:(UIImage *) [UIImage imageNamed:#"myBkgnd.png"]];
UIButton *clickBtn = [UIButton buttonWithType:UIButtonTypeCustom ];
[clickBtn addTarget:self action:#selector(myButton_pressed:) forControlEvents:UIControlEventTouchUpInside];
[clickBtn setImage:(UIImage *) [UIImage imageNamed:#"btnImage.png"] forState:UIControlStateNormal];
clickBtn.frame = CGRectMake(111, 200, 75, 60);
[myBackImage addSubview:clickBtn];
[self.view addSubview:myBackImage];
}
- (void)myButton_pressed:(UIButton*)button {
NSLog(#"Button Pressed!");
}
What am I overlooking?
Thanks!
As you have added UIButton in UIImageView but didn't you forgot imageView's userInteraction by default NO. So :
myBackImage.userInteractionEnabled = YES;
EDIT : Just formatted
Related
Weird thing
navigationbar'alpha value changes after dismissing view controller
Step
Click button that presents a new viewcontroller
Set navigation bar alpha to 0.0 when the button is clicked
Dismiss viewcontroller which I presented right before.
Result [NG]
navigationbar'alpha value is set to 1.0
Expected result
navigationbar's alpha should be 0.0 as expected
Below sample is pretty much easy
ViewController class
- (void)viewWillAppear:(BOOL)animated {
NSLog(#"%s : %f", __func__, self.navigationController.navigationBar.alpha);
}
- (void)viewDidAppear:(BOOL)animated {
NSLog(#"%s : %f", __func__, self.navigationController.navigationBar.alpha);
}
- (void)viewWillDisappear:(BOOL)animated {
NSLog(#"%s : %f", __func__, self.navigationController.navigationBar.alpha);
}
- (void)viewDidLoad {
[super viewDidLoad];
self.navigationController.navigationBar.backgroundColor = [UIColor orangeColor];
self.view.backgroundColor = [UIColor whiteColor];
UIButton *clickMe = [[UIButton alloc] initWithFrame:CGRectMake(100, 100, 100, 30)];
[clickMe setTitle:#"clickme" forState:UIControlStateNormal];
[clickMe setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
[clickMe addTarget:self action:#selector(btnClicked) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:clickMe];
}
- (void)btnClicked {
self.navigationController.navigationBar.alpha = 0.0f;
second *sec = [[second alloc] init];
[self presentViewController:sec animated:YES completion:nil];
}
second class
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
self.navigationController.navigationBar.backgroundColor = [UIColor orangeColor];
self.view.backgroundColor = [UIColor yellowColor];
UIButton *getBack = [[UIButton alloc] initWithFrame:CGRectMake(100, 100, 100, 40)];
[getBack setTitle:#"getBack" forState:UIControlStateNormal];
[getBack setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
[getBack addTarget:self action:#selector(btnClicked) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:getBack];
}
- (void)btnClicked {
[self dismissViewControllerAnimated:YES completion:nil];
}
I really would like to know what happened in this..
If someone knows this, let me know.. Thank you in advance.
So I have an IBAction hooked up to multiple buttons in IB I want this action to be fired when another IBAction is called I also want it to recognise an int from the second action as the [sender tag].
// viewController.m
-(IBAction)buttonPress {
int getInter = [sender tag];
UIView *tmpView = [self.view viewWithTag:getInter];
NSString *title = [(UIButton *)sender currentTitle];
}
I then have another action that needs to call buttonPress.
-(IBAction)secondButtonPress {
int varInt = 1
[self buttonPress: nil] <--- How do I pass varInt that buttonPress would recognise as a sender Tag here?
}
I realise that I could just create the button like so and duplicate the code in secondButtonPress but that seems to messy...
UIButton *tmpButton2 = (UIButton *)[self.view viewWithTag:varInt];
So the question is, is there a way of tricking buttonPress into thinking it has been pressed and passing a variable through as the sender tag for that action. In a way programatically tricking buttonPress into thinking it has been pressed.
Thank you in advance.
I ended up hooking it up to the same IBAction and running an if statement to do something if that tag was called.
Seems simple now!
-(IBAction)buttonPress {
int getInter = [sender tag];
if ([sender tag] == 2) {
//Do something just for that button.
}
else
{
UIView *tmpView = [self.view viewWithTag:getInter];
NSString *title = [(UIButton *)sender currentTitle];
}
}
UIButton *btn1 = [[UIButton alloc] initWithFrame:CGRectMake(10, 10, 20, 20)];
[btn1 setTitle:#"Button 1" forState:UIControlStateNormal];
btn1.tag = 1;
[btn1 addTarget:self action:#selector(buttonClick:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:btn1];
UIButton *btn2 = [[UIButton alloc] initWithFrame:CGRectMake(10, 50, 20, 20)];
[btn2 setTitle:#"Button 2" forState:UIControlStateNormal];
btn2.tag = 2;
[btn2 addTarget:self action:#selector(buttonClick:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:btn2];
UIButton *btn3 = [[UIButton alloc] initWithFrame:CGRectMake(10, 90, 20, 20)];
[btn3 setTitle:#"Button 3" forState:UIControlStateNormal];
btn3.tag = 3;
[btn3 addTarget:self action:#selector(buttonClick:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:btn3];
write button click method as following and get button tag in it..
-(IBAction)buttonClick:(id)sender {
UIButton *btn = (UIButton *) sender;
NSLog(#"%d",btn.tag);
}
Just set the tag in initWithNibName method. Follow the sample and see whether it is helpful for you!!
#property(nonatomic,strong)IBOutlet UIButton *btn1;
#property(nonatomic,strong)IBOutlet UIButton *btn2;
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Set the Tag
self.btn1.tag=1;
self.btn1.tag=2;
}
return self;
}
-(IBAction)selectedButtonClick:(id)sender {
UIButton *btn = (UIButton *) sender;
NSLog(#"selectedButton%d",btn.tag);
}
Since starting with iPhone app development (last 9 months) I have only used IB. I have a project to work on already built by another developer that I need to optimise for iPhone screen. No problem in IB, I know how to do that, in this project however the Nav bar is added using code only and is an image view. Could someone advise me how I go about resizing/positioning the nav bar when IB isnt used? Im trying to enhance this app for the iphone 5 screen.
#define BAR_FRAME CGRectMake(0,0,320.0f,43.0f)
#implementation ICNavbarView
#synthesize homeButton=__homeButton;
#synthesize prevButton=__prevButton;
#synthesize nextButton=__nextButton;
#synthesize delegate=__delegate;
- (id)initWithFrame:(CGRect)frame
{
LogCmd();
self = [super initWithFrame:BAR_FRAME];
if (self) {
self.backgroundColor = [UIColor clearColor];
self.alpha = 0.9f;
// Add Navigation bar background // <<<<<< navigation bar from ui image
UIImageView *bgView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"BgNavBarNew"]];
[self addSubview:bgView];
// Add back button
__prevButton = [UIButton buttonWithType:UIButtonTypeCustom];
__prevButton.frame = CGRectMake(30.0f, 6.0f, 29.0f, 31.0f);
UIImage *prevButtonPressed = [UIImage imageNamed:#"BtnPrevPressed"];
[__prevButton setImage:[UIImage imageNamed:#"BtnPrev"] forState:UIControlStateNormal];
[__prevButton setImage:prevButtonPressed forState:UIControlStateSelected];
[__prevButton setImage:prevButtonPressed forState:UIControlStateHighlighted];
[__prevButton addTarget:self action:#selector(buttonPressed:) forControlEvents:UIControlEventTouchUpInside];
[self addSubview:__prevButton];
// Add next button
__nextButton = [UIButton buttonWithType:UIButtonTypeCustom];
__nextButton.frame = CGRectMake(262.0f, 6.0f, 29.0f, 31.0f);
UIImage *nextButtonPressed = [UIImage imageNamed:#"BtnNextPressed"];
[__nextButton setImage:[UIImage imageNamed:#"BtnNext"] forState:UIControlStateNormal];
[__nextButton setImage:nextButtonPressed forState:UIControlStateSelected];
[__nextButton setImage:nextButtonPressed forState:UIControlStateHighlighted];
[__nextButton addTarget:self action:#selector(buttonPressed:) forControlEvents:UIControlEventTouchUpInside];
[self addSubview:__nextButton];
// Add home button
__homeButton = [UIButton buttonWithType:UIButtonTypeCustom];
__homeButton.frame = CGRectMake(145.0f, 6.0f, 31.0f, 30.0f);
UIImage *homeButtonPressed = [UIImage imageNamed:#"BtnHomePressed"];
[__homeButton setImage:[UIImage imageNamed:#"BtnHome"] forState:UIControlStateNormal];
[__homeButton setImage:homeButtonPressed forState:UIControlStateSelected];
[__homeButton setImage:homeButtonPressed forState:UIControlStateHighlighted];
[__homeButton addTarget:self action:#selector(buttonPressed:) forControlEvents:UIControlEventTouchUpInside];
[self addSubview:__homeButton];
}
return self;
}
- (id)init
{
return [self initWithFrame:CGRectZero];
}
#pragma mark - Button handlers
- (void)buttonPressed:(id)sender
{
if (sender == __prevButton) {
[self.delegate performSelector:#selector(navBarPrevButtonPressed)];
} else if (sender == __homeButton) {
[self.delegate performSelector:#selector(navBarHomeButtonPressed)];
} else {
[self.delegate performSelector:#selector(navBarNextButtonPressed)];
}
}
#end
So far I tried UIViewAutoresizingFlexibleHeight; like this
// Add Navigation bar background
UIImageView *bgView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"BgNavBarNew"]];
[self addSubview:bgView];
//resize
bgView.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;
This seems to make no difference and the nav bar hasn't moved
I've used this before, but I used the setter function instead of using the property. I don't know if that would change anything or not, but try it this way:
[bgView setAutoresizingMask:(UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth)];
The parens are important, if you have multiple re-sizing options.
I have a view with a generic rounded rect button that segues to another view. When users press the rounded rect it starts a fetch. I would like to have a spinning wheel replace the text ("Next") inside the rounded rect button while the fetch is processed.
I created the spinner:
UIActivityIndicatorView *spinner = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];
[spinner startAnimating];
But I don't know how to make it replace the text in the rounded rect button.
Any suggestion? Thank you.
Create (or get a reference to) the button as usual, then, while handling the button click, create your spinner and set it as a subview of the button. It's probably also worth disabling the button to stop multiple clicks.
Something along the following lines should do the trick:
...
UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
button.frame = CGRectMake(10, 10, 70, 40);
[button setTitle:#"Next" forState:UIControlStateNormal];
[button addTarget:self action:#selector(click:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:button];
...
- (void)click:(UIButton *)button {
[button setTitle:#"" forState:UIControlStateNormal];
UIActivityIndicatorView *spinner = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];
[spinner startAnimating];
spinner.frame = button.bounds;
[button addSubview:spinner];
button.enabled = NO;
// do your actual work...
}
I wrote a category that utilizes associated objects
UIButton+ActivityIndicator.h
// Created by reynaldo on 1/16/14.
#import <Foundation/Foundation.h>
#interface UIButton (ActivityIndicator)
- (void)startActivityIndicator;
- (void)stopActivityIndicator;
#end
UIButton+ActivityIndicator.m
// Created by reynaldo on 1/16/14.
#import <objc/runtime.h>
#import "UIButton+ActivityIndicator.h"
static char TITLE_KEY;
static char ACTIVITY_INDICATOR_KEY;
#implementation UIButton (ActivityIndicator)
- (void)startActivityIndicator {
objc_setAssociatedObject(self, &TITLE_KEY, self.currentTitle, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
[self setTitle:#"" forState:UIControlStateNormal];
UIActivityIndicatorView *activityIndicatorView = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhite];
[self addSubview:activityIndicatorView];
activityIndicatorView.frame = CGRectMake(self.frame.size.width / 2, self.frame.size.height / 2. - 2, 7, 7);
[activityIndicatorView startAnimating];
objc_setAssociatedObject(self, &ACTIVITY_INDICATOR_KEY, activityIndicatorView, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
- (void)stopActivityIndicator {
NSString *title = objc_getAssociatedObject(self, &TITLE_KEY);
UIActivityIndicatorView *activityIndicatorView = objc_getAssociatedObject(self, &ACTIVITY_INDICATOR_KEY);
if(activityIndicatorView) {
[activityIndicatorView removeFromSuperview];
}
if(title.length) {
[self setTitle:title forState:UIControlStateNormal];
}
}
#end
im doing a test for subclassing uiControl, but it is not working yet,
here my code:
MainVC.m::
- (void)viewDidLoad
{
[super viewDidLoad];
TesteaContol *tt = [[[TesteaContol alloc]initWithFrame:CGRectMake(20, 20, 80, 30)]autorelease];
[tt addTarget:self action:#selector(ttActiono:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:tt];
}
- (void)ttActiono:(TesteaContol*)message
{
NSLog(#"proyection");
}
TesteaContol.h
#interface TesteaContol : UIControl
TesteaControl.m
#import "TesteaContol.h"
#implementation TesteaContol
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
// Initialization code
NSLog(#"cao");
UIButton *vacas = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[vacas setTitle:#"pingus" forState:UIControlStateNormal]; ;
vacas.titleLabel.textColor = [UIColor blackColor];
vacas.frame = CGRectMake(0, 0, 80, 40);
[vacas addTarget:self action:#selector(vacasPressed:) forControlEvents:UIControlStateNormal];
[self addSubview:vacas];
}
return self;
}
- (void) vacasPressed:(id) sender
{
NSLog(#"vacanio");
[self sendActionsForControlEvents:UIControlEventTouchUpInside];
}
so I am testing with a uiButton, i see the button, but is not responding to the touches,
what im i missing?
thanks!
There is a problem here:
[vacas addTarget:self action:#selector(vacasPressed:)
forControlEvents:UIControlStateNormal];
The "forControlEvents" part should be of type UIControlEvents which UIControlStateNormal is not. For a regular button, you want to replace UIControlStateNormal with UIControlEventTouchUpInside:
[vacas addTarget:self action:#selector(vacasPressed:)
forControlEvents:UIControlEventTouchUpInside];