iOS setting view variable from view controller programmatically - ios

Question

I've created a view with a variable and loaded it in the loadView method of a view controller. How do I pass a value to the view variable from the view controller after the loadView method has been called?
LocationView.m
#import "LocationView.h"
#implementation LocationView
#synthesize locationTitle;
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
locationTitle = [[UILabel alloc]initWithFrame:CGRectMake(10, 10, 300, 20)];
[self addSubview:locationTitle];
}
return self;
}
LocationViewController.m
#import "LocationViewController.h"
#import "LocationView.h"
#interface LocationViewController ()
#end
#implementation LocationViewController
- (void)loadView
{
CGRect frame = [[UIScreen mainScreen] bounds];
LocationView *locationView = [[LocationView alloc] initWithFrame:frame];
[self setView:locationView];
}
- (void)viewDidLoad
{
[super viewDidLoad];
How do I pass a value to locationTitle here?
}

Answer 1

You've already set up the locationTitle property for LocationView objects, so you can just access that. The only thing you need to do beforehand is keep a reference to the LocationView object around in an instance variable so you can access it from any instance method.
#implementation LocationViewController {
LocationView *_locationView;
}
- (void)loadView
{
CGRect frame = [[UIScreen mainScreen] bounds];
_locationView = [[LocationView alloc] initWithFrame:frame];
[self setView:_locationView];
}
- (void)viewDidLoad
{
[super viewDidLoad];
_locationView.locationTitle = #"Test";
}
#end
Alternatively, since you are assigning the custom view to the view controllers main view, you could cast that:
- (void)viewDidLoad
{
[super viewDidLoad];
((LocationView *)self.view).locationTitle = #"Test";
}