A tip for "dealloc" method never be called

[tatowilson]

First of all, thank yannickl for this awesome project.

We imported the version 3.10.2 into our project, and found that the dealloc method was never called.

I found the _progressTargetTimer may never be invalid if the progress didn't reach the end.

YLProgressBar/YLProgressBar/YLProgressBar.m

Lines 326 to 342 in c7b29a6

	- (void)updateProgressWithTimer:(NSTimer *)timer
	{
	CGFloat dt_progress = [timer.userInfo floatValue];
	_progress += dt_progress;
	if ((dt_progress < 0 && _progress <= _progressTargetValue)
	|| (dt_progress > 0 && _progress >= _progressTargetValue))
	{
	[_progressTargetTimer invalidate];
	_progressTargetTimer = nil;
	_progress = _progressTargetValue;
	}
	[self setNeedsDisplay];
	}

So I wrote this in the host view's dealloc method to invalidate the _progressTargetTimer:

_progressBar.progress = 0;

YLProgressBar/YLProgressBar/YLProgressBar.m

Lines 227 to 230 in c7b29a6

	- (void)setProgress:(CGFloat)progress
	{
	[self setProgress:progress animated:NO];
	}

YLProgressBar/YLProgressBar/YLProgressBar.m

Lines 287 to 322 in c7b29a6

	- (void)setProgress:(CGFloat)progress animated:(BOOL)animated
	{
	@synchronized (self)
	{
	if (_progressTargetTimer && [_progressTargetTimer isValid])
	{
	[_progressTargetTimer invalidate];
	}
	CGFloat newProgress = progress;
	if (newProgress > 1.0f)
	{
	newProgress = 1.0f;
	} else if (newProgress < 0.0f)
	{
	newProgress = 0.0f;
	}
	if (animated)
	{
	_progressTargetValue = newProgress;
	CGFloat incrementValue = ((_progressTargetValue - _progress) * YLProgressBarStripesAnimationTime) / YLProgressBarProgressTime;
	self.progressTargetTimer = [NSTimer timerWithTimeInterval:YLProgressBarStripesAnimationTime
	target:self
	selector:@selector(updateProgressWithTimer:)
	userInfo:[NSNumber numberWithFloat:incrementValue]
	repeats:YES];
	[[NSRunLoop currentRunLoop] addTimer:_progressTargetTimer forMode:NSRunLoopCommonModes];
	} else
	{
	_progress = newProgress;
	[self setNeedsDisplay];
	}
	}
	}

The dealloc method was called finally.