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POiOS: keeping property values while switching between UITabBarItem's
 

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  1. POiOS: keeping property values while switching between UITabBarItem's
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    <p>I have a <code>UITabBarController</code> linked to 2 <code>UIViewControllers</code>, and in the "first" <code>UIViewController</code> I have properties whose values I need to be maintained when I switch to the other view controller and back. Instead, the value of those properties is reset every time I switch view controllers. How do I fix that? thanks!</p> <p>EDIT:</p> <p>heres my code in the <code>UIViewController</code> (the scrollview is under everything but the tab bar and a navigation bar I have on top):</p> <p><code>SplitBillViewController.m</code></p> <pre><code>@interface SplitBillViewController () @property (nonatomic) NSMutableArray *defPricesArray; @property (nonatomic) NSMutableArray *defQtyArray; @property (nonatomic) NSMutableArray *defTickArray; @property (nonatomic) NSMutableArray *defPeopleArray; @end @implementation SplitBillViewController - (void)viewDidLoad{ [super viewDidLoad]; } -(NSMutableArray *)defPeopleArray{ if(!_defPeopleArray){ _defPeopleArray=[[NSMutableArray alloc] initWithObjects:@"1", nil]; } return _defPeopleArray; } -(NSMutableArray *)defQtyArray{ if(!_defQtyArray){ _defQtyArray=[[NSMutableArray alloc] initWithObjects:@"1", nil]; } return _defQtyArray; } -(NSMutableArray *)defPricesArray{ if(!_defPricesArray){ _defPricesArray=[[NSMutableArray alloc] initWithObjects:@"0.00", nil]; } return _defPricesArray; } -(NSMutableArray *)defTickArray{ if(!_defTickArray){ _defTickArray = [[NSMutableArray alloc] initWithObjects:[NSNumber numberWithInt:1], nil]; } return _defTickArray; } -(void)viewWillAppear:(BOOL)animated{ n=1; aid=@""; UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(dismissTipPercentage)]; [self.view addGestureRecognizer:tap]; if (iPhone5){ self.view.backgroundColor=[UIColor colorWithPatternImage:[UIImage imageNamed:@"background-568h"]]; } else { self.view.backgroundColor = [UIColor blackColor]; } [self.scrollView addSubview:self.itemTable]; [self.scrollView addSubview:self.totalValue]; [self.scrollView addSubview:self.tip]; [self.scrollView addSubview:self.tipPercentage]; [self.scrollView addSubview:self.addedValue]; [self.scrollView addSubview:self.perPerson]; self.scrollView.alpha=1; if (!iPhone5)[self.scrollView setBackgroundColor:[UIColor colorWithPatternImage:[UIImage imageNamed:@"ScrollViewBackground"]]]; else [self.scrollView setBackgroundColor:[UIColor colorWithPatternImage:[UIImage imageNamed:@"ScrollViewBackground-568h"]]]; } </code></pre>
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    1. USdietbacon
    1. USdietbacon
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    1. CODoesn't sound like the default behaviour. Did you have any code in the ViewDidAppear method that overrides those properties?
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      1. POiOS: keeping property values while switching between UITabBarItem's
      1. USJeow Li Huan
    2. COYou need to post some code for that first controller. Show how those properties are set.
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      1. POiOS: keeping property values while switching between UITabBarItem's
      1. USrdelmar
    3. COcode added to question. sry :p
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      1. POiOS: keeping property values while switching between UITabBarItem's
      1. USdietbacon
 

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