I am creating an app using iOS 5, and I want to work as follows:
MainViewController w/ NavigationBar, and i set on viewDidLoad:
- (void)viewDidLoad
{
[super viewDidLoad];
NavViewController *nav = [[NavViewController alloc] init];
[self addChildViewController:nav];
[self.view addSubview:nav.view];
}
Like a "partial view" with some nav controls (my own/custom toolbar), and at NavViewController:
- (void)viewDidLoad
{
[super viewDidLoad];
CGRect viewRect = CGRectMake(0, 0, 320, 200);
self.view.frame = viewRect;
self.view.backgroundColor = [UIColor redColor];
}
At this point I have MainViewController with a navigation subview and still have space (in MainViewController view) that another subview can be added using the actions NavViewController.
Is there a serious flaw in this logic? or I can keep developing ?
Thnks a lot.
Related
I've built an UIView in storyboard that is composed like this:
UIView (called _view)
UIVisualEffetView (dark)
UIVIew
Button
I've done like this for the ability to reuse it between several Navigation Controller. So for this I've set everything and I can show my view in my main controller called "ViewController" that is embedded in a navigation controller. But the issue is that the blur is opaque, for example the blue navigation bar of my view controller is not visible under the UIVIsualAffectView !
Here is the code I use for setting up the custom view :
- (id)initWithFrame:(CGRect)frame {
self = [super initWithFrame:frame];
if (self) {
[self setup];
}
return self;
}
- (void)setup {
_view.backgroundColor = [UIColor clearColor];
UIView *rootView = [[[NSBundle mainBundle] loadNibNamed:#"SideMenuView" owner:self options:nil] objectAtIndex:0];
CGRect newFrame = rootView.frame;
newFrame.size.width = [[UIScreen mainScreen] bounds].size.width / 2;
newFrame.size.height = [[UIScreen mainScreen] bounds].size.height;
[rootView setFrame:newFrame];
UIWindow* currentWindow = [UIApplication sharedApplication].keyWindow;
currentWindow.backgroundColor = [UIColor clearColor];
currentWindow.windowLevel = UIWindowLevelNormal;
[currentWindow addSubview:rootView];
}
And here is the code I use to call the view from my main controller:
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
[self.leftBarButton setTarget:self];
[self.leftBarButton setAction: #selector(test)];
}
- (void)test {
SideMenuView *test = [[SideMenuView alloc] init];
[self.view addSubview:test];
test.translatesAutoresizingMaskIntoConstraints = NO;
}
I've also tried to force the property "setOpaque" to No in my SideMenuView.m but without effect
Here is a screenshot of what it do:
Do you know guys what is wrong with my code ?
I've also added a button in the middle of the screen with a blue background but it's not visible under the blur so the issue is not navigation bar specific
Thanks in advance for your help !
I've resolved my issue by simply creating an UIView with clear background.
What I do for adding the blur effect is to create the UIVisualEffectView programmatically (doing this way it work perfectly !).
After that I'm adding my UIView as a subview of my UIVisualEffectView and voila :)
I am trying to do something like this -
- (void)viewDidLoad {
[super viewDidLoad];
ThingViewController *thingViewController = [self thingControllerForCard:self.card];
thingViewController.view.frame = CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height);
UIView *view = [thingViewController view];
[self.view addSubview:view];
}
It just gives me a white screen with nothing in it. If I push the new view controller on the navigation stack it shows the controller properly. Any idea what I might be missing?
You should set the thingViewController frame on the viewDidLayoutSubviews.
viewDidLoad does not has the frames set correctly at this time:
- (void)viewDidLoad {
[super viewDidLoad];
ThingViewController *thingViewController = [self thingControllerForCard:self.card];
UIView *view = [thingViewController view];
[self.view addSubview:view];
}
- (void)viewDidLayoutSubviews {
[super viewDidLayoutSubviews];
thingViewController.view.frame = CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height);
}
here's my code in mainViewController.m:
#import "SideViewController.h"
- (void)viewDidLoad{
SideViewController *sideVC = [[SideViewController alloc] initWithFrame:CGRectMake(0, 0, 250,self.view.bounds.size.height)];
[self.navigationController.view addSubview:sideVC.view];
}
mainViewController was embedded in UINavigationController via storyboard
sideViewController was added to UINavigationController as its subview because I needed it cover the Navigation Bar
and how it shows on iOS8 simulator:
How could I make it fit the screen bounds?
I guess autoresize mask solve this problem:
- (id)initWithCoder:(NSCoder *)aDecoder
{
self = [super initWithCoder:aDecoder];
if (self)
{
sideVC = [SideViewController new];
[sideVC.view setFrame:CGRectMake(0, 0, 250,self.view.bounds.size.height)];
sideVC.view.autoresizingMask = UIViewAutoresizingNone;
}
return self;
}
I have 2 view controllers, the first is a storyboard (this is root) and the second with is nibless. When I press a button in the root view controller it should call the second controller.
Here the code for my second view controller:
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
UILabel *sampleLabel = [[UILabel alloc] initWithFrame: CGRectMake(0,0,100,100)];
UIImageView * basketItem = [[UIImageView alloc]initWithImage:[UIImage imageNamed:#"B.jpg"]];
[self.view addSubview:sampleLabel];
[self.view addSubview:basketItem];
NSLog(#"%#",self.view.subviews);
sampleLabel.text = #"Main Menu";
}
return self;
}
self.view.sebviews query shows that 2 objects label and imageView objects exists, but in fact I see black screen only.
Here is transition method
- (void)transitionToViewController:(UIViewController *)aViewController
withOptions:(UIViewAnimationOptions)options
{
aViewController.view.frame = self.containerView.bounds;
[UIView transitionWithView:self.containerView
duration:0.65f
options:options
animations:^{
[self.viewController.view removeFromSuperview];
[self.containerView addSubview:aViewController.view];
}
completion:^(BOOL finished){
self.viewController = aViewController;
}];
}
Move the code in viewDidLoad. Here you are sure the view has been loaded into memory and hence can be further customized.
- (void)viewDidLoad
{
[super viewDidLoad];
UILabel *sampleLabel = [[UILabel alloc] initWithFrame: CGRectMake(0,100,100,100)];
UIImageView * basketItem = [[UIImageView alloc]initWithImage:[UIImage imageNamed:#"B.jpg"]];
[self.view addSubview:sampleLabel];
[self.view addSubview:basketItem];
NSLog(#"%#",self.view.subviews);
sampleLabel.text = #"Main Menu";
}
If you are not using ARC, pay attention to memory leaks.
Note
I really suggest to read Apple doc for this. You should understand how things work. Hope that helps.
http://developer.apple.com/library/ios/#featuredarticles/ViewControllerPGforiPhoneOS/ViewLoadingandUnloading/ViewLoadingandUnloading.html
Edit
I don't know what the problem could be. To make it work, try to override loadView (in MenuViewController) method like the following:
- (void)loadView
{
CGRect applicationFrame = [[UIScreen mainScreen] applicationFrame];
UIView *contentView = [[UIView alloc] initWithFrame:applicationFrame];
contentView.backgroundColor = [UIColor redColor]; // red color only for debug purposes
self.view = contentView;
}
Leave the viewDidLoad method as I wrote and see what happens.
When you create the view controller use only init method.
MenuViewController *vc = [[MenuViewController alloc] init];
Your UILabel's frame has size.width=0:
CGRectMake(0,100,0,100)
and if B.jpg is not added to the project you UIImageView will also be empty.
Also, if second UIViewController doesn't have a XIB, initialize it using the - (id)init method instead of - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil.
I have one screen where I want to show master-detail interface. But I need master to be hideable with animation. As far as I know UISplitViewController doesn't support that.
So, instead I made one UIViewController and added two child controllers to him.
In this container view controller I do:
- (id)init
{
self = [super init];
if (self) {
self.masterViewController = [[MasterViewController alloc] init];
[self addChildViewController:self.masterViewController];
self.detailViewController = [[DetailViewController alloc] init];
[self addChildViewController:self.detailViewController];
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
self.masterViewController.view.frame = CGRectMake(0, 0, 256, 748);
[self.view addSubview:self.masterViewController.view];
self.detailViewController.view.frame = CGRectMake(256, 0, 768, 748);
[self.view addSubview:self.detailViewController.view];
}
But the result is a complete mess. It doesnt change frame properly.
What is the correct way to mimic master-detail properly when I have two view controllers (each one has his own superclass)?