Setting the title of current column in UITextField from UIPickerView? - ios

Question

I have a UIPickerView that is being automatically loaded in loaded when a user touches the UITextField, at the end of selection the user can close the UIPicker by touching the "close" that I have added in the inputAccessoryView = toolbar;. My problem is that I need to set the value that is chosen in the UIPicker to be the value of self.textOutlet.text... I attempt to do so here but with no luck :
- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component {
return [tempList objectAtIndex:row];
selectedText = _textOutlet.text;
Can someone please give me some ideas on how to fix this problem? Here is my header code:
#import <UIKit/UIKit.h>
#interface ViewController : UIViewController <UIPickerViewDataSource, UIPickerViewDelegate>
#property (strong, nonatomic) NSString* selectedText; //the UITextField text
#property NSArray * tempList;
#end
And here is my implementation code:
#import "ViewController.h"
#interface ViewController ()
#property (weak, nonatomic) IBOutlet UILabel *myLabel;
#property (weak, nonatomic) IBOutlet UIPickerView *thePicker;
#property (weak, nonatomic) IBOutlet UITextField *textOutlet;
#end
#implementation T3ViewController
#synthesize tempList, selectedText;
// returns the number of 'columns' to display.
- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView {
return 1;
}
// returns the # of rows in each component..
- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component {
return [tempList count];
}
- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component {
return [tempList objectAtIndex:row];
selectedText = _textOutlet.text;
}
- (void)pickerView:(UIPickerView *)pickerView
didSelectRow:(NSInteger)row
inComponent:(NSInteger)component {
CGFloat chosenValue;
switch (row) {
case 0:
chosenValue = 0.0000233;
break;
case 1:
chosenValue = 0.0001273;
break;
case 2:
chosenValue = 0.0012333;
break;
case 3:
chosenValue = 0.0032204;
break;
case 4:
chosenValue = 0.0234179;
break;
case 5:
chosenValue = 0.0002369;
break;
case 6:
chosenValue = 0.0004442;
break;
default:
chosenValue = 0;
break;
}
NSNumberFormatter *formatter = [[NSNumberFormatter alloc]init];
formatter.numberStyle = NSNumberFormatterDecimalStyle;
formatter.minimumFractionDigits=7;
self.myLabel.text = [formatter stringFromNumber:#(chosenValue)];
}
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
tempList = [[NSArray alloc] initWithObjects:#"3222° F",#"22150° F",#"1260° F",#"12170° F",#"83210° F",#"84415° F",#"10120° F", nil];
// hides the picker upon initiation of the view
self.thePicker.hidden = YES;
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
-(void)doneClicked:(id) sender
{
[_textOutlet resignFirstResponder]; //hides the pickerView
}
- (void)textFieldDidBeginEditing:(UITextField *)textField {
if (textField == self.textOutlet) {
self.textOutlet.inputView = _thePicker;
self.thePicker.hidden = NO;
UIToolbar* toolbar = [[UIToolbar alloc] init];
toolbar.barStyle = UIBarStyleBlackTranslucent;
[toolbar sizeToFit];
//to make the done button aligned to the right
UIBarButtonItem *flexibleSpaceLeft = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];
UIBarButtonItem* doneButton = [[UIBarButtonItem alloc] initWithTitle:#"Done"
style:UIBarButtonItemStyleDone target:self
action:#selector(doneClicked:)];
[toolbar setItems:[NSArray arrayWithObjects:flexibleSpaceLeft, doneButton, nil]];
self.textOutlet.inputAccessoryView = toolbar;
}
}
#end

Answer 1

In your first snippet of code, you are setting selectedText after the return statement. This line of code will never get executed.

Answer 2

You need to return AFTER setting the selectedText
- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component {
selectedText = _textOutlet.text;
return [tempList objectAtIndex:row];