iOS UISegmentedControl cannot position programmatically

Question

I cannot change the location of the UISegmentedControl. If I do this:

segControl2.frame = CGRectMake( segControl1.origin.x, segControl2.origin.y, segControl2.size.width, segControl2.size.height);

nothing really changes, and everybody says changing the frame of the control should make it, but it really does not.

Answer 1

CGRect frame = [[UIScreen mainScreen] bounds];
UISegmentedControl *segControl = [[UISegmentedControl] initWithItems:[NSArray alloc] initWithObjects:@"One", @"Two", @"Three", nil];
segControl.frame = CGRectMake(frame.origin.x + 50, frame.origin.y + 50, segControl.size.width, segControl.size.height);
[view addSubview:segControl];

Should work just fine.

Answer 2

For changing the position of any element after you had added as subview, you can use the following:

CGRect frame = segControl2.frame;
frame.origin.x = segControl1.frame.origin.x;
// for changes to other properties, do likewise. if no changes, don't do anything
frame.origin.y = ...

segControl2.frame = frame;

Answer 3

这可以是“自动布局”，您可以尝试以编程方式创建UISegmentedControl。