从子视图访问UIViewcontroller-iOS

Question

I have a UIView .xib file. This is opened from the storyboard entry point UIViewController1 as a subview. The subview has a IBButton which when pressed opens a UIViewController2. Is this possible by any chance?

Answer 1

First, create a segue going from your first view controller to your second. I'm going to name it OpenViewController2 . We'll be able to call that segue programmatically.

In your UIView .h file, create a protocol that defines a delegate for that view:

SomethingView.h:

@protocol SomethingViewDelegate <NSObject> {
    - (void)importantThingHappened;
}

...

@interface SomethingView {
    id<SomethingViewDelegate> delegate;
}

@property (nonatomic, strong) id<SomethingViewDelegate> delegate;

SomethingView.m:

@implementation
@synthesize delegate;

...

// The IBAction for the button in your view
- (IBAction)buttonClicked:(id)sender {
    [delegate importantThingHappened];
}

MyViewController.m, where you create your view:

// Create view
UIView *myView = ...

myView.delegate = self;

Later in MyViewController:

// Implement the protocol. This function will be called when the button action
// inside of the UIView you created is pressed
- (void)importantThingHappened {
    [self performSegueWithIdentifier:@"OpenViewController2" sender:self];
}

Answer 2

First give your IBButton an unique tag, and in your UIViewController's viewDidLoad,

// add following line into viewDidLoad

[(UIButton*)[self.view viewWithTag:MY_UNIQUE_TAG_FOR_BUTTON] addTarget:self action:@selector(buttonPressed:) forControlEvent:UIControlEventTouchUpInside];

and finally implement the buttonPressed: for whatever you want

-(void) buttonPressed:(UIButton*)aButton {
    // do what you want to do.
}