How Can I Identify That The Value Is Changed For Switch Button, That I Have Store In Database.

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There are two pages
home.m
settings.m

I'm having a switch button in setting.m page and i'm storing it in NSManagedObjectContext.

And i have read this value in home.m page like this. I'm having an another switch button in home.m page to see whether it reflects or not.

C#

- (void) viewWillAppear:(BOOL)animated {

    if ([[self.settings objectForKey:@"mem"]boolValue])
        self->Mode.on = YES;
    else
        self->Mode.on = NO;

Whenever i save the switch value in settings.m page it will reflect on home.m page.
Now what i need is " how do i find that the value is changed or not? "

Really i'm stucked in this for past two days. help me to complete this. I have miles to go in my project.
Thanks in Advance.

Posted 24-Mar-15 2:44am

SViki

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KarstenK · Answer 1 · 2015-03-24T05:31:00

Solution 1

There are different ways. You can declare an outlet to access the uiswitch via its on property and set it.

Another way to work work via the Interface Builder and handle the event "Value changed".

Posted 24-Mar-15 5:31am

KarstenK

SViki · Answer 2 · 2015-03-26T23:46:00

C#

- (void)viewDidLoad
{
    [super viewDidLoad];
    if ([[self.settings objectForKey:@"mem"]boolValue])
        self->mySwitch.on = YES;
    else
        self->mySwitch.on = NO;
    [mySwitch addTarget:self action:@selector(changeSwitch:) forControlEvents:UIControlEventValueChanged];
    [self.view addSubview:mySwitch];
}

- (void)changeSwitch:(id)sender{
    if([sender isOn]){
        NSLog(@"Switch is ON");
    } else{
        NSLog(@"Switch is OFF");
    }
}

I'm getting the changes in mySwitch when I click it but it does not calls the changeSwitch: method automatically when the value changes in core data.

I'm looking for this Please help me.