iPhone - UISegmentedControl segment width = 0?
I have a UISegmentedControl with 3 segments and I want to change the width of one segment 1 when the user chooses any segment. Here is the code:
// the UISegmentedControl is created
[segmentedControl addTarget:self action:@selector(changeIt:)
forControlEvents:UIControlEventValueChanged];
//...
// and this is the changeIt method:
- (void) changeIt:(id)sender {
// discover the original width of segment 1, to restore it later
UISegmentedControl *seg = (UISegmentedControl*)sender;
CGFloat segWidth = [seg widthForSegmentAtIndex:1];
// At this point segWidth = 0 ?????????????????
开发者_StackOverflow社区// note: seg is not nil at this point. Printing seg to console shows it is
// a valid UISegmentedControl...
}
Any clues? Thanks.
Documentation says "The default value is {0.0}, which tells UISegmentedControl to automatically size the segment."
You probably want to use the UISegmentedController
methods – removeSegmentAtIndex:animated:
and either – insertSegmentWithTitle:atIndex:animated:
or – insertSegmentWithImage:atIndex:animated:
, depending on whether you want a title or an image for the segment.
精彩评论