UIPickerView as inputView of UITextField

Use like this,

 // Picker
UIPickerView *picker = [[UIPickerView alloc]initWithFrame:CGRectMake(0, 0, self.view.frame.size.width,150)];
picker.dataSource = self;
picker.delegate = self;

// Tool bar
UIToolbar *pickerToolbar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width,35)];
pickerToolbar.barStyle = UIBarStyleDefault;

// Bar button
UIBarButtonItem *doneButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(pickerDoneButtonTapped:)];
UIBarButtonItem *flexSpace = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:self action:nil];
[pickerToolbar setItems:@[flexSpace,doneButton]];

self.selectedLockerTextFiled.inputAccessoryView = pickerToolbar;
self.selectedLockerTextFiled.inputView = picker;

Below code for done button actions,

-(void)pickerDoneButtonTapped:(id)picker{
    [self.view endEditing:YES];}

Try this, it works fine, put it in viewdidload.

yourpicker = [[UIPickerView alloc] initWithFrame:CGRectMake(0, 50, 100, 150)];
    [yourpicker setDataSource: self];
    [yourpicker setDelegate: self];
    yourpicker.showsSelectionIndicator = YES;
    self.yourtextfield.inputView = yourpicker;

do not [self.view addSubview: yourpicker]; this