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POHow do I make an "infinite" UIPickerView?
 

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  1. POHow do I make an "infinite" UIPickerView?
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    <p>I have a picker view where the user is entering a time. When they scroll down to hour 23, I want hour zero to appear as the next item, and the sequence to re-start. How can I achieve this?</p> <p>Here is my current picker view data source: </p> <pre><code>- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView { return 3; } - (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component { NSArray *sectionContents = [[self dataForDatapickerRows] objectAtIndex:component]; NSInteger rows = [sectionContents count]; NSLog(@"component %d rows is: %d",component,rows); return rows; } - (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component { self.dataPickerInstance.backgroundColor=[UIColor whiteColor]; return ([[[self dataForDatapickerRows ]objectAtIndex:component] objectAtIndex:row]); } - (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component { if(component==0) { [self setHou:(NSInteger*)[[[self dataForDatapickerRows ]objectAtIndex:component] objectAtIndex:row]]; } else if(component==1) { [self setMinut:(NSInteger*)[[[self dataForDatapickerRows ]objectAtIndex:component] objectAtIndex:row]]; } else if(component==2) { [self setSecon:(NSInteger*)[[[self dataForDatapickerRows ]objectAtIndex:component] objectAtIndex:row]]; } NSLog(@"%@",[[[self dataForDatapickerRows ]objectAtIndex:component] objectAtIndex:row]); } - (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view{ UILabel* tView = (UILabel*)view; if (!tView){ tView = [[UILabel alloc] init]; [tView setFrame:CGRectMake(0, 0, 90,60)]; tView.self.textColor=[UIColor whiteColor]; tView.minimumFontSize = 80; tView.textAlignment=UITextAlignmentCenter; tView.adjustsFontSizeToFitWidth = YES; tView.autoresizesSubviews=YES; tView.font = [UIFont boldSystemFontOfSize:40]; tView.backgroundColor = [UIColor blackColor]; //tView.highlightedTextColor=[UIColor greenColor]; // factLabel.frame = CGRectMake(factLabel.frame.origin.x, factLabel.frame.origin.y, factLabel.frame.size.width, lLabelSIze.height); // // Setup label properties - frame, font, colors etc } // Fill the label text here tView.text=[[[self dataForDatapickerRows ]objectAtIndex:component] objectAtIndex:row]; return tView; } </code></pre> <p><img src="https://i.stack.imgur.com/unXIm.png" alt="enter image description here"></p>
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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

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