Question

In my code I am using a UISegmentedControl as a “button” with only ONE segment and the momentary property set to YES. In versions of the SDK prior to iOS 4, this was not a problem, but it appears that now iOS 4 requires that there be at least 2 segments. The following code throws an exception:

NSArray *titles = [NSArray arrayWithObject:@"Button Title"];
myButton = [[UISegmentedControl alloc] initWithItems:titles];

and now in Interface Builder you cannot even create a UISegmentedControl with less than 2 segments. It logs the following error when building:

“The number of segments property of a segmented control must be greater than or equal to 2.”

I’m kinda stumped. Any work arounds for this? I tried to create a UISegmentedControl with two buttons and then remove one programmatically and that “works” as it doesn’t cause the app to crash. I get a button in iOS 3 and nothing in iOS 4. Any ideas?

Answer 1

Really strange. It still works fine for me both in iOS4 simulator and device (this is a real working snippet from my code):

NSArray *laterContent = [NSArray arrayWithObjects: @"Maybe later", nil];
UISegmentedControl *later = [[UISegmentedControl alloc] initWithItems:laterContent];
CGRect frame = CGRectMake(  20,
                          98,
                          self.alert.bounds.size.width/2 - 30,
                          30);

later.frame = frame;

later.selectedSegmentIndex = -1;

[later addTarget:self action:@selector(laterAction:) forControlEvents:UIControlEventValueChanged];

later.segmentedControlStyle = UISegmentedControlStyleBar;
later.tintColor = [UIColor colorWithRed:130.0f/255.0f green:74.0f/255.0f blue:54.0f/255.0f alpha:0.8f];
later.momentary = YES;
later.alpha = 0.9;