I want obtain the View above all button,Button to set the background.The following code error
When the program is open,Settings button background.
NSButton *button = [(AppWindow *)self.window button];
if (button.tag==5) {
[button setImage:[NSImage imageNamed:#"menuBtnDown.png"]];
}
Related
in the TVOS Application storyboard mainview I added a subview.
Within the subview there are 3 button created in the very same way (the code here belongs to the subview)
UIButton *b = [UIButton buttonWithType:UIButtonTypeSystem];
b.frame = CGRectMake(left, top, 400, size);
[b setTitle:#"Click Me" forState:UIControlStateNormal];
[b addTarget:self action:#selector(Action_Up) forControlEvents:UIControlEventPrimaryActionTriggered];
[self.view addSubview:b];
...
-(void)Action_Up {
[self ShowData];
}
in the simulator and on the real device I can select the button and press it, but the action is never fired.
Could you help ?
Try this.. it worked for me
button.addTarget(self, action: "someMethodName:", forControlEvents: .PrimaryActionTriggered)
I'm working on a mapkit view, i added a button on an annotation like this:
UIButton *bt = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
[bt setFrame:CGRectMake(0, 0, 30, 30)];
annView.rightCalloutAccessoryView = bt;
i want to go to another view (for example expleViewController) when touching that button, i'm accustomed to do it using an IBAction method and link it with the button using Interface Builder, but this button is created manually, so how can I link it?
[bt addTarget:self action:#selector(buttonPressed:) forControlEvents:UIControlEventTouchUpInside];
- (void)buttonPressed:(UIButton *)b
{
// do whatever you want ;)
}
I have button created programmatically in the UIImageView. This view was also created programmatically. When image in this view is tapped the button is created, now I want to capture when this button is tapped but I'm unable to here is my relevant code :
- (void)imageTapped:(UIGestureRecognizer *)sender{
MyImageView *myView = (MyImageView *)sender.view;
NSLog(#"Image tapped is => %#", myView.currentImageName);
//add button to view
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
[button addTarget:self
action:#selector(pressedPlay:)
forControlEvents:UIControlEventTouchDown];
//button image
UIImage *backgroundImage = [UIImage imageNamed:[NSString stringWithFormat:#"playbutton.png"]];
button.frame = CGRectMake(85.0, 175.0, backgroundImage.size.width, backgroundImage.size.height);
myView.userInteractionEnabled = YES;
button.userInteractionEnabled = YES;
[button setImage:backgroundImage forState:(UIControlStateNormal)];
[myView addSubview:button];
}
Now this code should handle the tap but for some reason it doesn't :
- (void)pressedPlay:(UIGestureRecognizer *)sender{
//MyImageView *senderView = (MyImageView *) sender.view;
NSLog(#"%#", #"I Presed button");
}
Any reason why this is not working?
Your code suggests that you are using a UIGestureRecognizer (most likely a UITapGestureRecognizer) to detect the initial tap. The problem is that UIGestureRecognizer is being greedy and stopping the UIButton from receiving the touch.
You will need to do some shifting to disable the gesture recognizer after the initial detection and then reenable it after the play has been tapped.
UIGestureRecognizer has the property
#property(nonatomic, getter=isEnabled) BOOL enabled
or you can choose to implement UIGestureRecognizerDelegate and provide an implementation of
gestureRecognizer:shouldReceiveTouch:
a very simple attempt could look like:
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch;
{
return ![touch.view isKindOfClass:[UIButton class]];
}
and don't forget to set the delegate on the gesture recognizer
myGesture.delegate = self;
set the button frame from:
button.frame = CGRectMake(85.0, 175.0, backgroundImage.size.width, backgroundImage.size.height);
to:
button.frame = CGRectMake(0,0, backgroundImage.size.width, backgroundImage.size.height);
it looks like you are setting button frame outside the imageview's frame and hence the button is not actually getting any interaction.
The Button frame is likely setting the button outside the bounds of the UIImageView, frames are always relative to the superviews coordinate in this case the UIImageView.
[button setExclusiveTouch:YES];
I have placed a pause button in UI, where when the user clicks the button, the image of button from pause image it has to change to the start image. I have placed both the start and the pause images in the bundle, I am able to do this,but when i click on start again , it should show pause image button,How to do this, the following is the code i am using,
-(IBAction)btnClked:(id)sender
{
[pauseButton setImage:[UIImage imageNamed:#"pause.png"] forState:UIControlStateNormal];
UIButton *btn=(UIButton *)sender;
[btn setImage:[UIImage imageNamed:#"start.png"] forState:UIControlStateNormal];
}
You need a variable to keep track of that state change. A BOOL is fine.
But using your code, you can "abuse" the tag property of UIButton to tell if it's playing (tag == 1) or paused (tag == 0)
-(IBAction)btnClked:(id)sender {
UIButton *btn=(UIButton *)sender;
if (btn.tag == 1) {
btn.tag = 0;
[btn setImage:[UIImage imageNamed:#"pause.png"] forState:UIControlStateNormal];
} else {
btn.tag = 1;
[btn setImage:[UIImage imageNamed:#"start.png"] forState:UIControlStateNormal];
}
}
You can use UIButton's selected state to do the same. For example, while initiating the button you have to define 2 images. One for normal state and other for selected state. When touch event of the button fired, you have to make it selected. If it is already selected you need to deselect it. This is much better, than maintaining additional variables to check selected state of the button. Also you could improve the performance with this approach.
Code example
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
UIButton *startButton = [[UIButton alloc] initWithFrame:CGRectMake(200, 300, 60, 60)];
[startButton setBackgroundImage:[UIImage imageNamed:#"start.png"] forState:UIControlStateNormal];
[startButton setBackgroundImage:[UIImage imageNamed:#"pause.png"] forState:UIControlStateSelected];
[startButton addTarget:self action:#selector(modeButtonClick:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:startButton];
}
- (IBAction)modeButtonClick:(id)sender {
UIButton *startButton = (UIButton *)sender;
[startButton setSelected:![startButton isSelected]];
}
If you are creating the button from story board or XIBs set the backgroud image for default state config and selected state config.
I am creating some buttons and putting them inside a UIScrollView like this:
int i = 0;
while (i != numberOfButtons ) {
int updatetY = 160*i;
CGRect buttonFrame = CGRectMake(updatetY, 0, 160, 60);
UIButton *button = [[UIButton alloc] initWithFrame:buttonFrame];
UIImage *buttonImage = [UIImage imageNamed:#"bg.png"];
[button setBackgroundImage:buttonImage forState:UIControlStateNormal];
[button setTitle:[buttonsArray objectAtIndex:i] forState:UIControlStateNormal];
[button addTarget:self action:#selector(MYPROBLEM) forControlEvents:UIControlEventTouchUpInside];
[menuScrollView addSubview:button];
i++;
}
Now I need to build a method to capture which button is being touched, and run a specific bunch of code (see (MYPROBLEM).
Anybody knows what I can do to "trace" which button is being touched and then run a specific function?
something like:
-(void) buttonfunction
{
case ...
doThis
case...
doThat
}
thanks in advance.
You need to use the tag property of the uibutton control. It's a numeric id for the button. You can set a tag on the button based on the i variable in your loop, for instance:
button.tag=i;
Then in your button's action message, you would simply add the id of the button as a parameter and check its tag like so:
-(void) buttonFunction:(id)sender {
switch (sender.tag)
{
//code goes here
}
}
Hope this helps.