If you make the selectedCountryCode
variable part of a singleton class (for example AppDelegate
or preferebly some other), and then equate the value, this is surely going to work. Here I don't understand how the selectedCountryCode
is expected to be retained even after the view is popped.
I tried with making the string a part of AppDelegate (which is of course not a good practice. One should put it in another singleton class).
#import "CViewController.h"
#import "AppDelegate.h"
@interface CViewController ()<UITextFieldDelegate, UIPickerViewDelegate, UIPickerViewDataSource>
@property(nonatomic, strong) UIPickerView *countryPicker;
@property (nonatomic, weak) IBOutlet UITextField *countryText;
@property (nonatomic, strong) NSArray *countryCodes;
@property (nonatomic, assign) int countrySelectedRow;
@property (nonatomic,strong) AppDelegate *delegate;
@end
@implementation CViewController
- (void)viewDidLoad
{
self.delegate = [[UIApplication sharedApplication] delegate];
_countryPicker = [[UIPickerView alloc] init];
[self initPicker:_countryPicker textField:_countryText];
self.countryCodes = @[@"A", @"B", @"C", @"D", @"E"];
}
- (void)initPicker:(UIPickerView*)pickerView textField:(UITextField*) textField
{
CGRect pickerFrame = CGRectMake(0, 0, 200, 216);
pickerView.frame = pickerFrame;
pickerView.userInteractionEnabled = YES;
pickerView.dataSource = self;
pickerView.hidden = YES;
pickerView.delegate = self;
pickerView.showsSelectionIndicator = YES;
[self.view addSubview:pickerView];
[textField setInputView:pickerView];
textField.delegate = self;
[pickerView removeFromSuperview];
}
- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component
{
return [self.countryCodes objectAtIndex:row];
}
- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView
{
return 1;
}
// returns the # of rows in each component..
- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component
{
return [self.countryCodes count];
}
- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
{
self.delegate.selectedCountryCode = [self.countryCodes objectAtIndex:row];
NSLog(@"picker was(is): %d",[_countryPicker selectedRowInComponent:0]);
}
-(void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
for (int i = 0; i < [self.countryCodes count]; i++)
{
if ([[self.countryCodes objectAtIndex:i] isEqualToString:self.delegate.selectedCountryCode]){
[_countryPicker selectRow:i inComponent:0 animated:YES];
self.countrySelectedRow = i;
break;
}
}
[_countryPicker reloadAllComponents];
}
-(void)textFieldDidBeginEditing:(UITextField *)textField
{
self.countryPicker.hidden = NO;
}