Capture dragging outside of UIControl -- UILongPressGestureRecognizer - objective-c

Question

I'm trying to implement an async voice recording feature. There's a button that has a UILongPressGestureRecognizer and this starts the recording. Right now, when they let go, the recording is saved and sent.
#pragma mark - Actions
- (void) recordButtonPressed:(UILongPressGestureRecognizer *)gesture
{
if (gesture.state == UIGestureRecognizerStateBegan) {
[self.voiceRecorderView.recordButton setImage:[UIImage imageNamed:kWSGreyDotXLarge] forState:UIControlStateNormal];
[self startRecording];
}
if (gesture.state == UIGestureRecognizerStateEnded) {
[self stopRecording];
[self.voiceRecorderView.recordButton setImage:[UIImage imageNamed:kWSPinkDotXLarge] forState:UIControlStateNormal];
}
}
This works, but now I need to copy the now standard feature of allowing the user to drag their finger off the button while it's pressed to cancel the recording.
How to add a gestureRecognizer to tell if a user drags outside the control but is still pressing it?

Answer 1

I hope it will work for you....
BOOL cancelflag;
UIButton *recordBtn;
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:#selector(handleLongPress:)];
[longPress setDelegate:self];
[recordBtn addGestureRecognizer:longPress];
}
-(void)handleLongPress:(UILongPressGestureRecognizer *)longPressRecognizer
{
if(longPressRecognizer.state == UIGestureRecognizerStateBegan)
{
if (!stopBtnFlag)
{
if (!audioRecorder.recording)
{
[self performSelectorOnMainThread:#selector(setUpAudioRecorder) withObject:nil waitUntilDone:YES];
[audioRecorder record];
NSLog(#"Recording...");
}
stopBtnFlag = YES;
cancelflag =YES;
}
}
else if (longPressRecognizer.state == UIGestureRecognizerStateChanged)
{
[audioRecorder stop];
stopBtnFlag = NO;
NSLog(#"moved");
}
else if (longPressRecognizer.state == UIGestureRecognizerStateEnded)
{
if(cancelflag)
{
[audioRecorder stop];
[self playmusic];
}
}
}

Answer 2

#Jaleel's answer gave me a start. Here's a complete working version:
- (void) recordButtonPressed:(UILongPressGestureRecognizer *)gesture
{
if (gesture.state == UIGestureRecognizerStateBegan) {
[self.voiceRecorderView setCancelText:WSCancelLabelTextStart];
if (!audioRecorder.recording)
{
[self startRecording];
}
cancelflag = NO;
}
else if (gesture.state == UIGestureRecognizerStateChanged)
{
CGPoint touchPoint = [gesture locationInView:self.voiceRecorderView];
if (!CGRectContainsPoint(self.voiceRecorderView.recordButton.frame, touchPoint )) {
cancelflag = YES;
[self.voiceRecorderView.recordButton setImage:[UIImage imageNamed:kWSGreyDotXLarge] forState:UIControlStateNormal];
[self.voiceRecorderView setCancelText:WSCancelLabelTextCancelling];
}
else {
cancelflag = NO;
[self.voiceRecorderView.recordButton setImage:[UIImage imageNamed:kWSPinkDotXLarge] forState:UIControlStateNormal];
[self.voiceRecorderView setCancelText:WSCancelLabelTextStart];
}
}
else if (gesture.state == UIGestureRecognizerStateEnded) {
[self stopRecording];
if(!cancelflag)
{
[self sendRecording:self.recordingURL];
}
else {
[self.voiceRecorderView setCancelText:WSCancelLabelTextCancelled];
}
[self.voiceRecorderView resetView];
}
}