Question

I am using UICsutomSwitch for my application. When I try to create it, I am getting an exception like,

Terminating app due to uncaught exception ‘NSRangeException’, reason: ‘* -[NSArray objectAtIndex:]: index 2 beyond bounds for empty array’

My code is as follows,

UICustomSwitch.h

 #import <Foundation/Foundation.h>


 @interface UICustomSwitch : UISwitch 
{
}
-(void)setLeftLabelText:(NSString *)labelText;
-(void)setRightLabelText:(NSString *)labelText;
@end

UICustomSwich.m

 #import "UICustomSwitch.h"


 @implementation UICustomSwitch
 -(UIView *)slider
 {
  return [[self subviews ] lastObject];
 }
-(UIView *)textHolder
{
  return [[[self slider] subviews]objectAtIndex:2];
 }
-(UILabel *)leftLabel
 {
   return [[[self textHolder] subviews]objectAtIndex:0];

  }
-(UILabel *)rightLabel
{
  return [[[self textHolder] subviews]objectAtIndex:1];

}
-(void)setLeftLabelText:(NSString *)labelText;
{
   [[self leftLabel] setText:labelText];
 }
-(void)setRightLabelText:(NSString *)labelText
{
   [[self rightLabel]setText:labelText];

}
@end

View Controller:

     UICustomSwitch* switchView=[[[UICustomSwitch alloc]initWithFrame:CGRectMake(200,5,90,30)]autorelease];
    [switchView setLeftLabelText:@"F"];
    [switchView setRightLabelText:@"M"];
    [switchView addTarget:self action:@selector(genderAction:) forControlEvents:UIControlEventValueChanged];
    [elementView addSubview:switchView];

I am getting exception at ” return [[[self slider] subviews]objectAtIndex:2];” call. I don’t know what is the wrong, Can you guys please suggest me on this.

Thanks in advance,
Sekhar.

Answer 1

I ran across this issue and found the answer here:Custom UISwitch Text

Basically in iOS 4, there were UILabel’s in the UISwitch’s subviews that represented the “On/Off” labels. In iOS 5, there are no UILabels in the subviews array (hence the array error you’re getting). The above link offers an external class you can download and customize. In my opinion, it seems like Apple is discouraging customization of UISwitch. The functionality you’re after could be accomplished another way (segmented control, simulated checkbox, etc).

Also, in the given link above, the author proposes that the issue might be with not including armv6. I tried this and it does not fix the problem.