How to prevent UIPickerView from closing when the user selects a field? - ios

Question

I am trying to prevent my UIPickerview from closing when a field is selected by a user. I want the user to be able to select a field without UIPickerview dismissing automatically. I have tried so many things such as trying the following but none of them helped:
_txtfield.hidden=NO;
[_pickerView endEditing:NO];
[pickerView endEditing:NO];
[_txtfield endEditing:NO];
[self endEditing:NO];
_pickerView.hidden=NO;
-----------------Here is more code----------------
#implementation FieldWithPickerView {
void(^pickerCallback)(NSInteger row);
CGRect myFrame;
}
-(void)viewDidAppear{
}
-(void)commonInit:(CGRect)frame{
[[NSBundle mainBundle] loadNibNamed:NSStringFromClass([self class]) owner:self options:nil];
[self addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:#"H:|[view]|" options:0 metrics:nil views:#{#"view":self.InputViewPicker}]];
[self addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:#"V:|[view]|" options:0 metrics:nil views:#{#"view":self.InputViewPicker}]];
[self.layer setCornerRadius:10.0f];
[self setClipsToBounds:YES];
_pickerView = [[UIPickerView alloc] init];
_pickerView.delegate=self;
UIToolbar *toolBar=[[UIToolbar alloc]initWithFrame:CGRectMake(0, 0, 320, 44)];
[toolBar setTintColor:[UIColor grayColor]];
UIBarButtonItem *doneBtn=[[UIBarButtonItem alloc]initWithTitle:#"Done" style:UIBarButtonItemStyleBordered target:self action:#selector(removePicker)];
UIBarButtonItem *space=[[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];
[toolBar setItems:[NSArray arrayWithObjects:space,doneBtn, nil]];
[self.txtfield setInputAccessoryView:toolBar];
self.txtfield.inputView = _pickerView;
[_txtfield.inputView setBackgroundColor:[UIColor clearColor]];
[_txtfield setBackgroundColor:[UIColor clearColor]];
_txtfield.text=#"--Select---";
_label_view.textColor=[UIColor whiteColor];
_label_view.backgroundColor=SECURUSBLUE;
_label_view.textAlignment = NSTextAlignmentCenter;
_txtfield.textAlignment = NSTextAlignmentCenter;
}
-(void)removePicker
{
[_txtfield resignFirstResponder];
}
-(void)pickerListenner:(void(^)(NSInteger row))handler
{
pickerCallback=handler;
}
- (id)initWithFrame:(CGRect)frame
{
// NSLog(#"initwithframe picker");
self = [super initWithFrame:frame];
if (self)
{
[self commonInit:frame];
}
return self;
}
#pragma mark - Picker View Data source
- (NSInteger)numberOfComponentsInPickerView:
(UIPickerView *)pickerView
{
return 1;
}
- (NSInteger)pickerView:(UIPickerView *)pickerView
numberOfRowsInComponent:(NSInteger)component
{
return [_pickerData count];;
}
- (NSString *)pickerView:(UIPickerView *)pickerView
titleForRow:(NSInteger)row
forComponent:(NSInteger)component
{
if(_pickerData.count == 0)
return #"There is nothing";
return [_pickerData objectAtIndex:row];
}
#pragma mark -
#pragma mark - UIPickerViewDelegate
- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component {
// Code logic
NSLog(#"selected row --->%ld!!!!",(long)row);
pickerCallback(row);
// _txtfield.text=[_pickerData objectAtIndex:row];
_txtfield.hidden=NO;
}
- (NSInteger)selectedRowInComponent:(NSInteger)component
{
return component;
}

Answer 1

You need to implement the UIPickerView delegate methods, so add <UIPickerViewDelegate> to your ViewController.
in your viewDidLoad method conform to the protocol like so:
pickerView.delegate = self;
Then add the following method to detect when a row has been selected:
- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
{
// do nothing because it will not dismiss
}
You will need to implement the numberOfRowsInComponent, numberOfComponents, and titleForRow delegate methods as well, but once those are implemented your picker view should not dismiss when a row is selected. You will need to manually dismiss the picker view in your didSelectRow delegate method.