UIPickerView with toolbar when UITextField is clicked - ios

Question

I'm trying to get a UIPickerView to display when a UITextField is clicked on by the user. I also want the UIPickerView to have a toolbar at the top with buttons to submit the selection and cancel.
Do I need to connect a UIPickerView in the interface builder, or connect an action somewhere else? I am also getting warnings when I build. One warning is under the resignFirstResponder. It says:
local declaration of age hides instance variable
There are several more warning similar to the one above for different variables.
Another warning is:
Class 'PracticePickerViewController' does not implement the 'UIActionsheetDelegate' protocol.
Here are my .h and .m files:
.h
#import <UIKit/UIKit.h>
#interface PracticePickerViewController : UIViewController <UITextFieldDelegate>{
IBOutlet UITextField *age;
IBOutlet UIPickerView *agePickerView;
IBOutlet UIActionSheet *actionSheet;
IBOutlet UIToolbar *pickerToolbar;
}
#end
.m
#import "PracticePickerViewController.h"
#implementation PracticePickerViewController
-(void)textFieldDidBeginEditing:(UITextField *)age{
[age resignFirstResponder];
actionSheet = [[UIActionSheet alloc] initWithTitle:#"Pick Your Age" delegate:self cancelButtonTitle:nil destructiveButtonTitle:nil otherButtonTitles:nil];
[actionSheet setActionSheetStyle:UIActionSheetStyleBlackTranslucent];
CGRect pickerFrame = CGRectMake(0,40,0,0);
UIPickerView *agePickerView = [[UIPickerView alloc] initWithFrame:pickerFrame];
agePickerView.showsSelectionIndicator = YES;
agePickerView.dataSource = self;
agePickerView.delegate = self;
[actionSheet addSubview:agePickerView];
pickerToolbar = [[UIToolbar alloc] initWithFrame:CGRectMake(0,0,320,44)];
pickerToolbar.barStyle = UIBarStyleBlackOpaque;
[pickerToolbar sizeToFit];
NSMutableArray *barItems = [[NSMutableArray alloc] init];
UIBarButtonItem *flexSpace = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:self action:nil];
[barItems addObject:flexSpace];
UIBarButtonItem *doneBtn = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:#selector(doneButtonPressed:)];
[barItems addObject:doneBtn];
UIBarButtonItem *cancelBtn = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCancel target:self action:#selector(cancelButtonPressed:)];
[barItems addObject:cancelBtn];
[pickerToolbar setItems:barItems animated:YES];
[actionSheet addSubview:pickerToolbar];
[actionSheet addSubview:agePickerView];
[actionSheet showInView:self.view];
[actionSheet setBounds:CGRectMake(0,0,320,485)];
}

Answer 1

local declaration of age hides instance variable
This means you've defined a variable name that is already used by a class variable (so in this case, you may have declared UITextField *age somewhere in the class, but you can't re-use variable name age in this class because the compiler will confuse it with the class variable).
Class 'PracticePickerViewController' does not implement the 'UIActionsheetDelegate' protocol.
You haven't made your PracticePickerViewController a UIActionsheetDelegate. To do this, you have change your interface header (PracticePickerViewController.h) to read:
#interface PracticePickerViewController : UIViewController <UITextFieldDelegate, UIActionsheetDelegate>{
Don't forget to implement the required delegate methods as well!
Finally, I strongly recommend you check out the ActionSheetPicker project.It's a drop-in class that has exactly the functionality you're trying to implement, so you can either replace your current code with that, or just use it as a reference to see how to implement the embedded ActionSheet inside the UIPickerView correctly. Hope all that helps!