UIPickerView Row Color

后端 未结 5 1700
Happy的楠姐
Happy的楠姐 2021-02-15 17:04

Does anyone know how to change the color of a row (or row background) in the UIPickerView control from the iPhone SDK? Similiar to the below title for row, however I would also

5条回答
  •  南旧
    南旧 (楼主)
    2021-02-15 17:39

    I implemented the following based on Sean's answer:

    - (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view
    {
        CGRect rowFrame = CGRectMake(00.0f, 0.0f, [pickerView viewForRow:row forComponent:component].frame.size.width, [pickerView viewForRow:row forComponent:component].frame.size.height);
        UILabel *label = [[UILabel alloc] initWithFrame:rowFrame];
        label.font = [UIFont boldSystemFontOfSize:18.0f];
    
        // This is an array I pass to the picker in prepareForSegue:sender:
        label.text = [self.values objectAtIndex:row];
        label.textAlignment = UITextAlignmentCenter;
    
        // This is an array I pass to the picker in prepareForSegue:sender:
        if ([self.backgroundColors count]) {
            label.backgroundColor = [self.backgroundColors objectAtIndex:row];
    
            // self.lightColors is an array I instantiate in viewDidLoad: self.lightColors = @[ [UIColor yellowColor], [UIColor greenColor], [UIColor whiteColor] ];
            label.textColor = [self.lightColors containsObject:label.backgroundColor] ? [UIColor blackColor] : [UIColor whiteColor];
        } else {
            label.textColor = [UIColor blackColor];
        }
    
        return label;
    }
    

提交回复
热议问题