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    <p>I have a custom time picker (UIPickerView), for which the delegate looks like this:</p> <pre><code>-(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView{ return 4; // it's with am/pm in my case } -(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component{ /// 18000 is divisible with 12, 24 (for the hour) and 60 (for the minutes and seconds) /// it can still get to the end.. but will need a lot of scrolling /// I set the initial value between 9000 and 9060 if (component==0) { // hour return 18000; } if (component==3) { // am/pm return [_datasource count]; } // seconds and minutes - could use 45000 so it repeats the same number of time as the hours return 18000; } -(NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component{ if (component==3) { // am/pm return [_datasource objectAtIndex:row]; } if (component==0) { // hour return [NSString stringWithFormat:@"%d", row%12]; } return [NSString stringWithFormat:@"%02d", row%60]; } -(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component{ if (component==3) { // am/pm if (row==0&amp;&amp;_h&gt;11) { _h-=12; } if (row==1&amp;_h&lt;12) { _h+=12; } } else if(component==0){ _h=row%12; if ([self selectedRowInComponent:3]==1) { // handle am/pm _h+=12; } } else if(component==1){ _m=row%60; } else if(component==2){ _s=row%60; } } -(CGFloat)pickerView:(UIPickerView *)pickerView widthForComponent:(NSInteger)component{ // set the size for components if (component&lt;3) { return 50; } return 70; } </code></pre>
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    1. POHow do I make an "infinite" UIPickerView?
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    1. COhi friend, first thing i need to say thank to you.In your code i need to increase the row count to 18000 but i need only 24 for hour and 60 for second and minute, then what i need to do. Do u have any idea ? please share
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    2. COFirst, remove the last component from all the methods (am/pm). Then, you'll need to modify `pickerView:titleForRow:forComponent:` for your needs (e.g: for the hour to take values between 0-23 use `[NSString stringWithFormat:@"%d", row%24]`, to take values between 1 and 24 use `[NSString stringWithFormat:@"%d", row%24+1]`). The seconds and minutes already take values only between 0 and 59. Check the link from `user792677`'s post, it might explain better (it uses the same idea, and it scrolls back to the middle after a new value is selected).
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    3. COoh.. you'll also need to modify `pickerView:didSelectRow:inComponent:` to return the same values (remove the first if - am/pm - at `component==0` `_h` (hour) will be row%24 (or row%24+1, depends how you use it in the `titleForRow:` method).
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