I have a subclassed UIButton that I made into an irregular shape (Parallelogram) where I override the touch events so it will only accept touch events inside the shape
How can I implement a touch event like a normal UIButton where I can cancel a touch event upon tapping and dragging the finger outside the UIButton to cancel a touch. For my current code, If I drag my finger inside the button, it calls the touchesCancelled event. I am using the TouchUpInside event for performing methods in the UIButton. Here is my code:
- (id)initWithFrame:(CGRect)frame withAngle:(AngleType)angle andColor:(UIColor *)color
{
if ((self = [super initWithFrame:frame])){
[self setImage:[Utils imageWithColor:color andSize:frame.size] forState:UIControlStateNormal];
_path = [UIBezierPath new];
self.angleType = angle;
switch (angle) {
case AngleLeft:
{
[_path moveToPoint:CGPointMake(0, elementHeight(self))];
[_path addLineToPoint:CGPointMake(elementWidth(self), elementHeight(self))];
[_path addLineToPoint:CGPointMake(elementWidth(self), 0)];
[_path addLineToPoint:CGPointMake(15, 0)];
[_path addLineToPoint:CGPointMake(0, elementHeight(self))];
}
break;
case AngleRight:
{
[_path moveToPoint:CGPointMake(0, 0)];
[_path addLineToPoint:CGPointMake(0, elementHeight(self))];
[_path addLineToPoint:CGPointMake(elementWidth(self),elementHeight(self))];
[_path addLineToPoint:CGPointMake(elementWidth(self) - 15, 0)];
[_path addLineToPoint:CGPointMake(0, 0)];
}
break;
case AngleBoth:
{
[_path moveToPoint:CGPointMake(15, 0)];
[_path addLineToPoint:CGPointMake(0, elementHeight(self))];
[_path addLineToPoint:CGPointMake(elementWidth(self) - 15, elementHeight(self))];
[_path addLineToPoint:CGPointMake(elementWidth(self), 0)];
[_path addLineToPoint:CGPointMake(15, 0)];
}
break;
default:
break;
}
CAShapeLayer *mask = [CAShapeLayer new];
mask.frame = self.bounds;
mask.path = _path.CGPath;
self.layer.mask = mask;
}
return self;
}
- (void)setText:(NSString *)text withAlignment:(NSTextAlignment)alignment
{
_buttonLabel = [[UILabel alloc] init];
_buttonLabel.font = FONT_Helvetica_Neue(14);
_buttonLabel.textColor = [UIColor whiteColor];
_buttonLabel.text = text;
_buttonLabel.textAlignment = alignment;
if (alignment == NSTextAlignmentLeft) {
_buttonLabel.frame = CGRectMake(15 + 10, 0, elementWidth(self), elementHeight(self));
} else if (alignment == NSTextAlignmentRight) {
_buttonLabel.frame = CGRectMake(0, 0, elementWidth(self) - 15 - 10, elementHeight(self));
} else if (alignment == NSTextAlignmentCenter) {
_buttonLabel.frame = CGRectMake(0, 0, elementWidth(self), elementHeight(self));
}
[self addSubview:_buttonLabel];
}
- (void)setBackgroundColor:(UIColor *)backgroundColor
{
[self setImage:[Utils imageWithColor:backgroundColor andSize:self.frame.size] forState:UIControlStateNormal];
CAShapeLayer *mask = [CAShapeLayer new];
mask.frame = self.bounds;
mask.path = _path.CGPath;
self.layer.mask = mask;
}
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
UITouch *touch = [[event allTouches] anyObject];
CGPoint touchLocation = [touch locationInView:self];
if ([_path containsPoint:touchLocation]) {
NSLog(#"Inside!");
self.highlighted = YES;
//[self sendActionsForControlEvents:UIControlEventTouchUpInside];
}
}
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
UITouch *touch = [[event allTouches] anyObject];
CGPoint touchLocation = [touch locationInView:self];
self.highlighted = NO;
if ([_path containsPoint:touchLocation]) {
[self sendActionsForControlEvents:UIControlEventTouchUpInside];
}
}
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
UITouch *touch = [[event allTouches] anyObject];
CGPoint touchLocation = [touch locationInView:self];
if ([_path containsPoint:touchLocation]) {
NSLog(#"...");
self.highlighted = YES;
}
}
- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event
{
UITouch *touch = [[event allTouches] anyObject];
CGPoint touchLocation = [touch locationInView:self];
self.highlighted = NO;
if ([_path containsPoint:touchLocation]) {
[self sendActionsForControlEvents:UIControlEventTouchUpInside];
}
}
Instead of trying to implement custom touch events handling, please override the hitTest:withEvent: method. Please refer to this tutorial which I believe describes your case. And this is another example.
Related
I want to draw a straight line with my finger that automatically sizes based upon how far away I am from the point of origin.
So if I touch the screen in the middle and slide my finger out a line appears to 'stretch' and pivot around the point of orgin as my finger moves on the screen. WHhen I lift my finger. The Destination Point should finalize and create a line. I can drag my finger across the screen and 'Draw' on the screen but that's not what I am wanting to do.
I thought UIBeizerPath moveToPoint would help but it just messes things up.
What am I doing wrong?
- (id)initWithFrame:(CGRect)frame
{
//default line properties
myPath=[[UIBezierPath alloc]init];
myPath.lineCapStyle=kCGLineCapRound;
myPath.miterLimit=0;
myPath.lineWidth=lineWidth;
brushPattern=[UIColor blackColor];
}
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
CGPoint curPoint = [[touches anyObject] locationInView:self];
lastPoint = curPoint;
[myPath moveToPoint:lastPoint];
[pathArray addObject:myPath];
[self setNeedsDisplay];
}
-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event{
CGPoint curPoint = [[touches anyObject] locationInView:self];
myPath.lineWidth=lineWidth;
brushPattern=[UIColor redColor]; //red to show it hasn't been added yet.
[myPath moveToPoint:tempPoint];
[self setNeedsDisplay];
}
-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
CGPoint curPoint = [[touches anyObject] locationInView:self];
myPath.lineWidth=lineWidth;
brushPattern=[UIColor blackColor]; //finalize the line with black color
[myPath addLineToPoint:curPoint];
[self setNeedsDisplay];
}
Here's one concept. Draws a line from where you start dragging your finger until where you let go, animating it as you drag your finger around. It does this by making a CAShapeLayer, resetting the path as you move your finger around.
This should demonstrate the basic idea:
- (void)viewDidLoad {
[super viewDidLoad];
UIPanGestureRecognizer *gesture = [[UIPanGestureRecognizer alloc] initWithTarget:self action:#selector(handlePanGesture:)];
[self.view addGestureRecognizer:gesture];
}
- (CAShapeLayer *)createShapeLayer:(UIView *)view {
CAShapeLayer *shapeLayer = [[CAShapeLayer alloc] init];
shapeLayer.fillColor = [UIColor clearColor].CGColor;
shapeLayer.strokeColor = [UIColor redColor].CGColor;
shapeLayer.lineWidth = 3.0;
[view.layer addSublayer:shapeLayer];
return shapeLayer;
}
- (void)handlePanGesture:(UIPanGestureRecognizer *)gesture {
static CAShapeLayer *shapeLayer;
static CGPoint origin;
if (gesture.state == UIGestureRecognizerStateBegan) {
shapeLayer = [self createShapeLayer:gesture.view];
origin = [gesture locationInView:gesture.view];
} else if (gesture.state == UIGestureRecognizerStateChanged) {
UIBezierPath *path = [UIBezierPath bezierPath];
[path moveToPoint:origin];
CGPoint location = [gesture locationInView:gesture.view];
[path addLineToPoint:location];
shapeLayer.path = path.CGPath;
} else if (gesture.state == UIGestureRecognizerStateEnded ||
gesture.state == UIGestureRecognizerStateFailed ||
gesture.state == UIGestureRecognizerStateCancelled) {
shapeLayer = nil;
}
}
Or, in Swift 3:
override func viewDidLoad() {
super.viewDidLoad()
let pan = UIPanGestureRecognizer(target: self, action: #selector(handlePan(_:)))
view.addGestureRecognizer(pan)
}
private func createShapeLayer(for view: UIView) -> CAShapeLayer {
let shapeLayer = CAShapeLayer()
shapeLayer.fillColor = UIColor.clear.cgColor
shapeLayer.strokeColor = UIColor.red.cgColor
shapeLayer.lineWidth = 3.0
view.layer.addSublayer(shapeLayer)
return shapeLayer
}
private var shapeLayer: CAShapeLayer!
private var origin: CGPoint!
func handlePan(_ gesture: UIPanGestureRecognizer) {
if gesture.state == .began {
shapeLayer = createShapeLayer(for: gesture.view!)
origin = gesture.location(in: gesture.view)
} else if gesture.state == .changed {
let path = UIBezierPath()
path.move(to: origin)
path.addLine(to: gesture.location(in: gesture.view))
shapeLayer.path = path.cgPath
} else if gesture.state == .ended || gesture.state == .failed || gesture.state == .cancelled {
shapeLayer = nil
}
}
If you don't use CAShapeLayer, but you want to keep track of previous paths, you'll have to maintain an array for those old paths, and build a path that consists of all of the old paths, perhaps something like:
#interface CustomView ()
#property (nonatomic) CGPoint originPoint;
#property (nonatomic) CGPoint currentPoint;
#property (nonatomic) NSMutableArray *previousPaths;
#end
#implementation CustomView
- (id)initWithFrame:(CGRect)frame {
self = [super initWithFrame:frame];
if (self) {
[self configure];
}
return self;
}
- (id)init {
return [self initWithFrame:CGRectZero];
}
- (id)initWithCoder:(NSCoder *)aDecoder {
self = [super initWithCoder:aDecoder];
if (self) {
[self configure];
}
return self;
}
- (void)configure {
_previousPaths = [[NSMutableArray alloc] init];
}
- (void)drawRect:(CGRect)rect {
[[UIColor redColor] setStroke];
UIBezierPath *drawPath = [UIBezierPath bezierPath];
drawPath.lineCapStyle = kCGLineCapRound;
drawPath.miterLimit = 0;
drawPath.lineWidth = 3.0;
for (UIBezierPath *path in self.previousPaths)
[drawPath appendPath:path];
UIBezierPath *path = [self pathForCurrentLine];
if (path)
[drawPath appendPath:path];
[drawPath stroke];
}
- (UIBezierPath *)pathForCurrentLine {
if (CGPointEqualToPoint(self.originPoint, CGPointZero) && CGPointEqualToPoint(self.currentPoint, CGPointZero))
return nil;
UIBezierPath *path = [UIBezierPath bezierPath];
[path moveToPoint:self.originPoint];
[path addLineToPoint:self.currentPoint];
return path;
}
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
self.originPoint = [[touches anyObject] locationInView:self];
}
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *touch = [touches anyObject];
if ([event respondsToSelector:#selector(predictedTouchesForTouch:)]) {
touch = [[event predictedTouchesForTouch:touch] lastObject] ?: touch;
}
self.currentPoint = [touch locationInView:self];
[self setNeedsDisplay];
}
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
self.currentPoint = [[touches anyObject] locationInView:self];
[self.previousPaths addObject:[self pathForCurrentLine]];
self.originPoint = self.currentPoint = CGPointZero;
[self setNeedsDisplay];
}
#end
UIBezierPath is building a path from your instructions. Imagine a pen. When you say, "moveToPoint:" it moves the pen to that point. When you say "lineToPoint:" it puts the pen down and moves it from the current location to the new point. And so on.
To get the effect you desire, you will need to create a new path whenever the touches move, drawing a line from the original point to the current touch position.
How could i set up my images(points) with same fix distance to new image(point) when performing a touches moved?
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
UITouch *touch = [touches anyObject];
CGPoint touchLocation = [touch locationInView:touch.view];
UIImageView *imageView=[[UIImageView alloc] initWithImage:[UIImage imageNamed:#"Crayon_Black.png"]];
imageView.center = touchLocation;
[drawImage addSubview:imageView];
}
I hope this make sense. I just need to finish my school project. Thanks guys in advance.
This solution works as long as you don't move finger too fast:
#interface ViewController : UIViewController {
CGPoint lastLocation_;
CGFloat accumulatedDistance_;
}
...
-(CGFloat) distanceFromPoint:(CGPoint)p1 ToPoint:(CGPoint)p2 {
CGFloat xDist = (p2.x - p1.x);
CGFloat yDist = (p2.y - p1.y);
return sqrt((xDist * xDist) + (yDist * yDist));
}
-(void) addImageAtLocation:(CGPoint)location {
UIImageView *imageView=[[UIImageView alloc] initWithImage:[UIImage imageNamed:#"Crayon_Black.png"]];
imageView.center = location;
[self.view addSubview:imageView];
}
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
[super touchesBegan:touches withEvent:event];
lastLocation_ = [[touches anyObject] locationInView:self.view];
accumulatedDistance_ = 0;
[self addImageAtLocation:lastLocation_];
}
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
UITouch *touch = [touches anyObject];
CGPoint touchLocation = [touch locationInView:self.view];
CGFloat distance = [self distanceFromPoint:touchLocation ToPoint:lastLocation_];
accumulatedDistance_ += distance;
CGFloat fixedDistance = 40;
if (accumulatedDistance_ > fixedDistance) {
[self addImageAtLocation:touchLocation];
while (accumulatedDistance_ > fixedDistance) {
accumulatedDistance_ -= fixedDistance;
}
}
lastLocation_ = touchLocation;
}
In my application i have added gesture and these method
UITapGestureRecognizer *doubleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(handleDoubleTap:)];
UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(handleSingleTap:)];
UILongPressGestureRecognizer *longpress =[[UILongPressGestureRecognizer alloc] initWithTarget:self action:#selector(handellongpress:)];
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
UITouch *start = [[event allTouches] anyObject];
CGPoint StartPoint = [start locationInView:self.view];
NSLog(#"start points x : %f y : %f", StartPoint.x, StartPoint.y);
}
-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event{
UITouch *move = [[event allTouches] anyObject];
CGPoint MovePoint = [move locationInView:self.view];
NSLog(#"MovePoint x : %f y : %f", MovePoint.x, MovePoint.y);
}
-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event{
UITouch *end = [[event allTouches] anyObject];
CGPoint EndPoint = [end locationInView:self.view];
NSLog(#"end ponts x : %f y : %f", EndPoint.x, EndPoint.y);
}
-(void)handellongpress:(UITapGestureRecognizer *)recognizer {
CGPoint LongTapPoint = [recognizer locationInView:self.view];
NSLog(#"LongTapPoint.x %f,LongTapPoint.y %f",LongTapPoint.x,LongTapPoint.y);
}
- (void)handleSingleTap:(UITapGestureRecognizer *)recognizer {
CGPoint SingleTap = [recognizer locationInView:self.view];
NSLog(#"SingleTap.x %f,SingleTap.y %f",SingleTap.x,SingleTap.y);
}
- (void)handleDoubleTap:(UITapGestureRecognizer *)recognizer {
CGPoint doubleTapPoint = [recognizer locationInView:self.view];
NSLog(#"doubleTapPoint.x %f,doubleTapPoint.y %f",doubleTapPoint.x,doubleTapPoint.y);
}
Now what i want is user touch down in a certain place, drag across to a new place, then hold in place for a while how to detect that last location. i m facing a problem in which if the user start there swipe from button location touchMove and touchEnd location method dint get called.
how to call touchEnd method in longpress.
if(gestureRecognizer.state == UIGestureRecognizerStateBegan)
{
NSLog(#"UIGestureRecognizerStateBegan");
}
else if(gestureRecognizer.state == UIGestureRecognizerStateEnded)
{
NSLog(#"UIGestureRecognizerStateEnded");
}
else if(gestureRecognizer.state == UIGestureRecognizerStateChanged)
{
NSLog(#"UIGestureRecognizerStateChanged");
}
else if(gestureRecognizer.state == UIGestureRecognizerStateCancelled)
{
NSLog(#"UIGestureRecognizerStateCancelled");
}
else if(gestureRecognizer.state ==UIGestureRecognizerStateFailed )
{
NSLog(#"UIGestureRecognizerStateFailed");
}
use gestureRecogizer.state
I have two imageViews imageView1 and imageView2. I have given gestureRecognizer to move these both images. Now the problem is when i move first imageView near second imageView only second image view is displayed. But when i put first imageView on another image the first imageView should be displayed on the second imageView which is not happening.Can any body please tell me how can the first imageView gets view on the top of another imageView.
You can use the UIView method bringSubviewToFront:, and pass in the UIImageView that you want displayed on top.
Why dont you use something similar like this to drag your UIImageViews?
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
self.view.backgroundColor = [UIColor yellowColor];
test1 = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 100, 100)];
test1.backgroundColor = [UIColor whiteColor];
test1.userInteractionEnabled = YES;
test1.clipToBounds = YES;
[self.view addSubview:test1];
test2 = [[UIImageView alloc] initWithFrame:CGRectMake(400, 400, 100, 100)];
test2.backgroundColor = [UIColor whiteColor];
test2.userInteractionEnabled = YES;
test2.clipToBounds = YES;
[self.view addSubview:test2];
}
CGPoint startLocation;
float diffX;
float diffY;
-(void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
UITouch *touch = [[event allTouches] anyObject];
if( [touch view] == test1)
{
startLocation = [touch locationInView:self.view];
[self.view bringSubviewToFront:test1];
}
if( [touch view] == test2)
{
startLocation = [touch locationInView:self.view];
[self.view bringSubviewToFront:test2];
}
}
- (void) touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event{
UITouch *touch = [[event allTouches] anyObject];
if( [touch view] == test1)
{
CGPoint location = [touch locationInView:self.view];
diffX = location.x - startLocation.x;
diffY = location.y - startLocation.y;
test1.frame = CGRectMake(test1.frame.origin.x + diffX, test1.frame.origin.y + diffY, test1.frame.size.width, test1.frame.size.height);
startLocation = test1.frame.origin;
}
if( [touch view] == test2)
{
CGPoint location = [touch locationInView:self.view];
diffX = location.x - startLocation.x;
diffY = location.y - startLocation.y;
test2.frame = CGRectMake(test2.frame.origin.x + diffX, test2.frame.origin.y + diffY, test2.frame.size.width, test2.frame.size.height);
startLocation = test2.frame.origin;
}
}
//---EDIT---//
Added: cliptobounds in viewdidload
I need to make an UIImageView, on a scroll View, active for touching.
is a little UiimageView 100x50 were people can make the signature.
I am using the same code and it works, but with scroll view it doesn't.
I looked around, but I could not find a code for that.
.h
UIImageView *drawImage;
#property (nonatomic, retain) IBOutlet UIImageView *drawImage;
.m
#synthesize drawImage;
- (void)viewDidLoad {
[scrollView setScrollEnabled:YES];
[scrollView setContentSize:CGSizeMake(320,1540)];
if ([MFMailComposeViewController canSendMail])
button.enabled = YES;
drawImage.userInteractionEnabled = YES;
UITapGestureRecognizer *gestureRec = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(touchesBegan:)];
gestureRec.numberOfTouchesRequired = 1;
gestureRec.numberOfTapsRequired = 1;
[drawImage addGestureRecognizer:gestureRec];
[gestureRec release];
UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
[btn addTarget:self action:#selector(printItem) forControlEvents:UIControlEventTouchDown];
btn.frame = CGRectMake(75, 0, 44, 44);
[btn setImage:[UIImage imageNamed:#"print.png"] forState:UIControlStateNormal];
[self.view addSubview:btn];
}
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
mouseSwiped = NO;
UITouch *touch = [touches anyObject];
if ([touch tapCount] == 3) {
drawImage.image = nil;
return;
}
lastPoint = [touch locationInView:drawImage];
// lastPoint.y -=20;// only if signature goes bottom of the screen
}
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
mouseSwiped = YES;
UITouch *touch = [touches anyObject];
CGPoint currentPoint = [touch locationInView:drawImage];
currentPoint.y -=5; // only if signature goes bottom of the screen
UIGraphicsBeginImageContext(drawImage.frame.size);
CGContextRef currentContext = UIGraphicsGetCurrentContext();
[drawImage.image drawInRect:CGRectMake(0, 0, drawImage.frame.size.width, drawImage.frame.size.height)];
CGContextSetLineCap(currentContext, kCGLineCapRound);
CGContextSetLineWidth(currentContext, 2.0);
CGContextSetRGBStrokeColor(currentContext, 0.0, 0.0, 0.0, 1.0);
CGContextBeginPath(currentContext);
CGContextMoveToPoint(currentContext, lastPoint.x, lastPoint.y);
CGContextAddLineToPoint(currentContext, currentPoint.x, currentPoint.y);
CGContextStrokePath(currentContext);
drawImage.image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
lastPoint = currentPoint;
}
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *touch = [touches anyObject];
if ([touch tapCount] == 3) {
drawImage.image = nil;
return;
}
if(!mouseSwiped) {
UIGraphicsBeginImageContext(drawImage.frame.size);
CGContextRef currentContext = UIGraphicsGetCurrentContext();
[drawImage.image drawInRect:CGRectMake(0, 0, drawImage.frame.size.width, drawImage.frame.size.height)];
CGContextSetLineCap(currentContext, kCGLineCapRound);
CGContextSetLineWidth(currentContext, 3.0);
CGContextSetRGBStrokeColor(currentContext, 1.0, 1.0, 2.0, 2.0);
CGContextMoveToPoint(currentContext, lastPoint.x, lastPoint.y);
CGContextAddLineToPoint(currentContext, lastPoint.x, lastPoint.y);
CGContextStrokePath(currentContext);
drawImage.image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
}
}
I tried the NSZombieEnabled and I get a SIGABRIT on the UITouch line on touchesBegan
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
mouseSwiped = NO;
UITouch *touch = [touches anyObject];
if ([touch tapCount] == 3) {
drawImage.image = nil;
return;
}
lastPoint = [touch locationInView:drawImage];
// lastPoint.y -=20;// only if signature goes bottom of the screen
}
and a SIGABRIT here, in the int main(int argc, char *argv[]) line
#import <UIKit/UIKit.h>
int main(int argc, char *argv[])
{
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
int retVal = UIApplicationMain(argc, argv, nil, nil);
[pool release];
return retVal;
}
I still get the error like before:
2011-05-10 22:14:22.509 anamnesiprova[90427:207] -[UITapGestureRecognizer anyObject]: unrecognized selector sent to instance 0x6bd5ba0
2011-05-10 22:14:22.512 anamnesiprova[90427:207] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UITapGestureRecognizer anyObject]: unrecognized selector sent to instance 0x6bd5ba0'
I think you have to set userInteractionEnabled of your UIImageView to YES.
Another idea would be to add a GestureRecognizer to your imageView, for the beginning a simple one:
UITapGestureRecognizer *gestureRec = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(myMethodToBeCalled)];
gestureRec.numberOfTouchesRequired = 1;
gestureRec.numberOfTapsRequired = 1;
[myImageView addGestureRecognizer:gestureRec];
[gestureRec release];