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POThe UIButton does not always fire
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copied!<p>I have seen several similar questions but not anyone that has the answer to this question.</p> <p>I have a view with some programmatically created buttons. The problem is that the buttons only fires sometimes. If I touch a button at <em>exactly the same spot</em> several consecutive times it will either <em>always fire</em> or <em>never fire!</em> (I use the simulator and the MacBook's track-pad to hit exactly the same spot). I have the feeling that only 50% of the pixels within the button are active!!</p> <p>Here is how the button is created:</p> <pre><code>// Button Memory Recall UIButton *buttMR = [UIButton buttonWithType:UIButtonTypeRoundedRect]; buttMR.frame = CGRectMake(55, y, 50, 40); [buttMR setTitle:@"TEST" forState:UIControlStateNormal]; [buttMR addTarget:self action:@selector(memoryRecord:) forControlEvents:UIControlEventTouchUpInside]; [buttMR addTarget:self action:@selector(touchDownButt:) forControlEvents:UIControlEventTouchDown]; buttMR.showsTouchWhenHighlighted = YES; buttMR.titleLabel.font = [UIFont systemFontOfSize:12]; buttMR.tintColor = [UIColor orangeColor]; [buttMR sizeToFit]; // remove this later... [self addSubview:buttMR]; self.buttMRec = buttMR; </code></pre> <p>The app is rather complex. The view that contains the buttons (view B) is a subview of view A. The button view is not always shown. It is created, and slides in to cover view A when it is needed. </p> <p><img src="https://i.stack.imgur.com/10sP4.png" alt="enter image description here"></p> <p>Update: For some very strange reason, the info button on view A seems to cause the problem. If I replace that button by a rounded rect button, it seems to works fine. </p>

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