UIPickerView crashing - ios

Question

I am at loss as far as why there is a corruption in the below code. I pretty much lifted the existing "implementation" from examples. Still, when I try to change the value of my picker controller, code crashes because cloudProviders points to some random memory.
Please advise.
// SettingsViewController.h
#import <UIKit/UIKit.h>
#interface SettingsViewController : UIViewController
<UIPickerViewDelegate, UIPickerViewDataSource>
#property (retain, nonatomic) IBOutlet UIPickerView *picker;
#property (retain, nonatomic) NSArray *cloudProviders;
#end
// SettingsViewController.m
#import "SettingsViewController.h"
#interface SettingsViewController ()
#end
#implementation SettingsViewController
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
_cloudProviders = #[#"BOX", #"Yandex", #"Other"];
NSLog(#"Executing viewDidLoad");
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (void)dealloc {
[_picker release];
[super dealloc];
}
#pragma mark -
#pragma mark PickerView DataSource
- (NSInteger)numberOfComponentsInPickerView:
(UIPickerView *)pickerView
{
return 1;
}
- (NSInteger)pickerView:(UIPickerView *)pickerView
numberOfRowsInComponent:(NSInteger)component
{
return _cloudProviders.count;
}
- (NSString *)pickerView:(UIPickerView *)pickerView
titleForRow:(NSInteger)row
forComponent:(NSInteger)component
{
return _cloudProviders[row];
}
#pragma mark -
#pragma mark PickerView Delegate
-(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row
inComponent:(NSInteger)component
{
NSLog(#"Executing didSelectRow");
}
/*
-(IBAction)textFieldReturn:(id)sender
{
[sender resignFirstResponder];
}
*/
#end
Also, what tools do people use to track down memory leaks and such on iOS? Is there something that could tell me who modified my pointer?
Thank you

Answer 1

Anna is correct.
Setting the property as self.cloudProviders solves the problem.