I build my project in Xcode 8. UIPickerView separator lines are not visible in iOS 10 simulator and the devices, but works fine on iOS 9.3 devices and simulator. I tried to adju
This is my code:
-(UIView*)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view{
for(UIView *single in pickerView.subviews)
{
if (single.frame.size.height < 1)
{
single.backgroundColor = [UIColor grayColor];
}
}
//other code
}
I had this exact issue when I rebuilt a couple of solutions for iOS10 and deployed to iOS10 on both simulators and devices.
I narrowed the problem in my case to be down to selecting an item in the picker during initialisation. ie. I populate my picker and if we have already got a selection for this property then I preselect it and the lines are present. I do this during the initialisation when I set up my picker.
So my fix, which worked in my use case, was to select the 0 element in the case of no existing value.
Objective-C
UIPickerView *pickerView;
...
[pickerView selectRow:0 inComponent:0 animated:YES];
Swift
let pickerView: UIPickerView
...
pickerView.selectRow(0, inComponent: 0, animated: true)
This was fine for my solution since I effectively select row zero on setup.
I haven't had chance to dig into the reasoning or look for a cleaner solution, but since I've solved my problem I thought I'd share it here to help you all out if I can.
UIPickerView *pickerView = [[UIPickerView alloc] initWithFrame:CGRectMake(0, 44, 320, 200)];
pickerView.backgroundColor = [UIColor whiteColor];
pickerView.dataSource = self;
pickerView.delegate = self;
[pickerView selectRow:0 inComponent:0 animated:YES];
[self.view addSubview:pickerView];
add the code [pickerView selectRow:0 inComponent:0 animated:YES];
before pickerView added to superView.
I'm not sure what "separator lines" you are talking about. I don't see "separator lines" in iOS 9 either.
The only "lines" missing from your screen shot are the selection indicator. You can get them by setting the picker view's showsSelectionIndicator
to YES
. But you shouldn't have to; showing the selection indicator is the default. The docs say:
On iOS 7 and later ... the selection indicator is always shown
I am also facing the same issue. Below is my code for creating the UIPickerView:
self.pickerView = [[UIPickerView alloc] initWithFrame:CGRectMake(0, frame.size.height - 216, frame.size.width, 216)];
self.pickerView.dataSource = self;
self.pickerView.delegate = self;
self.pickerView.backgroundColor = [UIColor whiteColor];
self.pickerView.showsSelectionIndicator = YES;
[self addSubview:self.pickerView];
Solved this problem using subclass of UIPickerView:
import UIKit
class FixedPickerView: UIPickerView, UIPickerViewDelegate {
override func willMove(toSuperview newSuperview: UIView?) {
self.delegate = self
self.selectRow(0, inComponent: 0, animated: true)
self.delegate = nil
super.willMove(toSuperview: newSuperview)
}
}