How to implement two IBActions in UIButton without

问题:

I drag 2 IBActions from a UIButton, one with touchDown event and second with drag Inside.

- (IBAction)clickButton:(UIButton *)sender {
    NSLog(@"Click Button");
}

- (IBAction)dragInsideButton:(UIButton *)sender {
    NSLog(@"Drag Button");
}

But when I drag inside, the touchDown action also gets fired.

How to disable touchDown event when dragInside.

Thanks!

回答1:

i have solved a problem like this with using drag Events

add events to your button in .xib file or programatically.

programmatically is:

[mybut addTarget:self action:@selector(dragBegan:withEvent: )
  forControlEvents: UIControlEventTouchDown];
    [mybut addTarget:self action:@selector(dragMoving:withEvent: )
  forControlEvents: UIControlEventTouchDragInside];
    [mybut addTarget:self action:@selector(dragEnded:withEvent: )
  forControlEvents: UIControlEventTouchUpInside |
     UIControlEventTouchUpOutside];

then defininitons of events are:

- (void) dragBegan: (UIButton *) c withEvent:ev
{
    NSLog(@"dragBegan......");
    count=NO;//bool Value to decide the Down Event
    c.tag=0;
  [self performSelector:@selector(DownSelected:) withObject:mybut afterDelay:0.1];
 //user must begin dragging in 0.1 second else touchDownEvent happens

}

- (void) dragMoving: (UIButton *) c withEvent:ev
{
    NSLog(@"dragMoving..............");
    c.tag++;
}

- (void) dragEnded: (UIButton *) c withEvent:ev
{
    NSLog(@"dragEnded..............");
    if (c.tag>0 && !count)
    {

        NSLog(@"make drag events");

    }

}



-(void)DownSelected:(UIButton *)c
{
    if (c.tag==0) {
        NSLog(@"DownEvent");
        count=YES;//count made Yes To interrupt drag event
    }

}

回答2:

This method is tested, and should do what I think you're trying to do. You can change the delay in the timer to get the effect you want. I had to connect 3 actions to the button to make this work -- the third action is a touchUp that resets the system to the starting condition.

@interface LastViewController ()
@property (nonatomic) BOOL touchedDown;
@property (strong,nonatomic) NSTimer *downTimer;
@end

@implementation LastViewController 

- (void)viewDidLoad {
    [super viewDidLoad];
    self.touchedDown = NO;
}

-(IBAction)clickDown:(id)sender {
    self.downTimer = [NSTimer scheduledTimerWithTimeInterval:.3 target:self selector:@selector(buttonAction:) userInfo:nil repeats:NO];
}

-(IBAction)dragInside:(id)sender {
    [self.downTimer invalidate];
    [self buttonAction:self];
}


-(void) buttonAction:(id) sender {
    if ([sender isKindOfClass:[NSTimer class]]) {
        self.touchedDown = YES;
        NSLog(@"click down");
    }else{
        if (! self.touchedDown) {
             NSLog(@"Drag");
        }
    }
}

-(IBAction)touchUpAction:(id)sender {
    self.touchedDown = NO;
}

回答3:

Try this way:

isClicked is property of type BOOL. Set to YES.

- (IBAction)clickButton:(UIButton *)sender { //touch down
    if(isClick==YES){
       NSLog(@"Click Button");
       //do all your stuffs here
    }
    isClick=YES;
}

- (IBAction)dragInsideButton:(UIButton *)sender {
    NSLog(@"Drag Button");
    isClick=NO;
}

On top of this you can also implement removeTarget:Action:

Which ever method gets called first set isClick=NO, I expect clickButton is called first in button action.

回答4:

I got from Two action methods for an UIButton; next track and seek forward:

Change it As per your requirement.

Personally I'd just track the button's state with an integer on your view controller or within a button subclass. If you track what the button is doing you can control what each of the actions do. In your .h file put in some stuff like this:

enum {
    MyButtonScanning,
    MyButtonStalling,
    MyButtonIdle
};



@interface YourClass : UIViewController {
    NSInteger buttonModeAt;
}
@property (nonatomic) NSInteger buttonModeAt;
-(IBAction)buttonPushedDown:(id)sender;
-(void)tryScanForward:(id)sender;
-(IBAction)buttonReleasedOutside:(id)sender;
-(IBAction)buttonReleasedInside:(id)sender;
@end

And then in your .m file throw in some of this stuff:

@implementation YourClass
///in your .m file
@synthesize buttonModeAt;


///link this to your button's touch down
-(IBAction)buttonPushedDown:(id)sender {
    buttonModeAt = MyButtonStalling;
    [self performSelector:@selector(tryScanForward:) withObject:nil afterDelay:1.0];
}

-(void)tryScanForward:(id)sender {
    if (buttonModeAt == MyButtonStalling) {
        ///the button was not released so let's start scanning
        buttonModeAt = MyButtonScanning;
        
        ////your actual scanning code or a call to it can go here
        [self startScanForward];
    }
}

////you will link this to the button's touch up outside
-(IBAction)buttonReleasedOutside:(id)sender {
    if (buttonModeAt == MyButtonScanning) {
        ///they released the button and stopped scanning forward
        [self stopScanForward];
    } else if (buttonModeAt == MyButtonStalling) {
        ///they released the button before the delay period finished
        ///but it was outside, so we do nothing
    }
    
    self.buttonModeAt = MyButtonIdle;
}

////you will link this to the button's touch up inside
-(IBAction)buttonReleasedInside:(id)sender {
    if (buttonModeAt == MyButtonScanning) {
        ///they released the button and stopped scanning forward
        [self stopScanForward];
    } else if (buttonModeAt == MyButtonStalling) {
        ///they released the button before the delay period finished so we skip forward
        [self skipForward];
    }
    
    self.buttonModeAt = MyButtonIdle;
    
}

After that just link the button's actions to what I've noted in the comments before the IBactions. I haven't tested this but it should work.

回答5:

i'm not sure it will work but you can try

   - (IBAction)dragInsideButton:(UIButton *)sender {
    [sender removeTarget:self forSelector:@selector(clickButton:) forControlEvent:UIControlEventTouchDown];
}