I have two UIView contained in a UIViewController - firstView and secondView - that I initialize pragmatically. I have a UILabel in the firstView, and a UIButton in the secondView. I would like the button in the second view to change the label in the first view. In the implementation file of the second view I have the following code:
- (void) changeLabel: (UIButton *) sender{
firstView *view = [[firstView alloc] init];
view.label.text = @"Changed Text";
}
However I figured out that the above method just initializes a new class of firstView and does not link to the existing UIView. How can I change properties of firstView from within secondView?
Create properties in your view controller's header file for the views:
@property (nonatomic, retain) UIView *firstView;
@property (nonatomic, retain) UILabel *label;
When you create the view and label assign them to the properties:
self.firstView = // create your view here
self.label = // create your label here
Create a button property on your UIView object so you can access it later:
@property (nonatomic, retain) UIButton *button;
Then in your view controller file, when you create everything, access the view's button property and add a target, like this:
[firstView.button addTarget:self action:@selector(changeLabel) forControlEvents:UIControlEventTouchUpInside];
Then you can simply have the method your button calls be like this:
- (void)changeLabel {
self.label.text = @"Changed Text.";
}