Intially,I created view called MainView.Inside that View I have place the view called UnitsView.My Problem is: If I want to add the UnitsView over MainView means, Whether I have to use self.view or MainView .
UIView *MainView = [[UIViewalloc]initwithframe: CGRectMake (0,0,self.view.frame.size.width, self.view.frame.size.height) ];
TopView.backgroundColor = [UIColor grayColor];
[self.view addSubview:TopView];
UIView *UnitsView = [[UIView alloc]init];
[self.view (or)MainView addsubView:UnitsView];
UIView *UnitsView = [[UIView alloc]initwithframe: CGRectMake(0,0,width,height)];
[MainView addsubView:UnitsView];
[self.view addSubView:MainView];
To add view above view:-
UIView *UnitsView = [[UIView alloc]initwithframe:CGRectMake(0,0,100,100)];
UnitsView.backgroundColor = [UIColor grayColor];
[self.view addSubView:UnitsView];
UIView *SubUnit = [[UIView alloc]initwithframe:CGRectMake(0,0,50,50)];
SubUnit.backgroundColor = [UIColor greenColor];
[self.UnitsView addSubView:SubUnit];
Related
Regarding subviews in ios, I have a view that covers the whole screen, then I create and import another view which is just a red square on top of it. I was wondering if there is any difference or advantadge between these two approaches:
Approach 1:
//set the view
UIView *myView = [[UIView alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
myView.backgroundColor = [UIColor whiteColor];
[self.view addSubview:myView];
//setTheSquareView
CGRect firstFrame = CGRectMake(160, 240, 100, 150);
HypnosisView *firstView = [[HypnosisView alloc] initWithFrame:firstFrame];
firstView.backgroundColor = [UIColor redColor];
[self.view addSubview:firstView];
and approach 2:
//set the view
UIView *myView = [[UIView alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
myView.backgroundColor = [UIColor whiteColor];
[self.view addSubview:myView];
//setTheSquareView
CGRect firstFrame = CGRectMake(160, 240, 100, 150);
HypnosisView *firstView = [[HypnosisView alloc] initWithFrame:firstFrame];
firstView.backgroundColor = [UIColor redColor];
[myView addSubview:firstView];
The only difference being that in the first case I add both views as subviews of the main property view whereas in the second case I add the second view as a subview of the first view. They look the same on screen.
Thanks
The difference in my opinion that on the first approach if you change any of (myView) constraints , firstFrame will not change but in the second approach it will.
I have this code in viewDidLoad:
[self.navigationController setNavigationBarHidden:YES];
self.edgesForExtendedLayout = UIRectEdgeNone;
self.view.autoresizingMask = UIViewAutoresizingFlexibleHeight;
self.view.backgroundColor = [UIColor whiteColor];
//we need to add white background behind the status bar
CGFloat statusBarHeight = [UIApplication sharedApplication].statusBarFrame.size.height;
UIView* statusBarWhiteBackGround = [[UIView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, statusBarHeight)];
[statusBarWhiteBackGround setBackgroundColor:[UIColor whiteColor]];
[self.view addSubview:statusBarWhiteBackGround];
UIView * redBackGroundColor = [[UIView alloc] init];
[redBackGroundColor setBackgroundColor:[UIColor redColor]];
redBackGroundColor.frame =CGRectMake(0,statusBarHeight , self.view.frame.size.width, self.view.frame.size.height-statusBarHeight);
[self.view addSubview:redBackGroundColor];
statusWhiteBackGround view is used to change the color of the status bar.
here is the result of the above code:
but when the app enter background and then back to foreground, the redBackGroundColor view change it's orging.y as you can see in the bellow picture:
what's the problem ?thanks
Create a UIView programatically on method
-(void)viewDidLayoutSubviews{
screen=[[UIScreen mainScreen] bounds];
//Simple view
self.customView = [[CustomAlertOKView alloc]initWithFrame:CGRectMake(0, 20, screen.size.width, screen.size.height)];
[self.view addSubView:customView];
}
or
Create a view using storyboard and set the x as 0, y value as 20,width and height based on the screen size
#IBOutlet UIView *customView;
set the outlet in the storyboard,
Then set the background color of the custom view to redcolor and main view to white color
self.view.backgroundColor = [UIColor whiteColor];
customView.backgroundColor = [UIColor redColor];
I'm trying to flip between a front view and a back view, like a page of a book. I ran the following test code in a view controller and no animation happened. I only saw the back view (red square) appear statically for 2 seconds. What's wrong?
UIView *containerView = [[UIView alloc] initWithFrame:CGRectMake(0.0, 0.0, 100.0, 100.0)];
containerView.backgroundColor = [UIColor greenColor];
[self.view addSubview:containerView];
UIView *backView = [[UIView alloc] initWithFrame:containerView.bounds];
backView.backgroundColor = [UIColor redColor];
[containerView addSubview:backView];
UIView *frontView = [[UIView alloc] initWithFrame:containerView.bounds];
frontView.backgroundColor = [UIColor blueColor];
[containerView addSubview:frontView];
[UIView transitionFromView:frontView
toView:backView
duration:2.0
options:UIViewAnimationOptionTransitionFlipFromRight
| UIViewAnimationOptionShowHideTransitionViews
completion:^(BOOL finished) {
[containerView removeFromSuperview];
}];
If you declare your frontView, backView and containerViewas ivars:
#interface yourViewController ()
{
UIView *backView;
UIView *frontView;
UIView *containerView;
}
Then place your view initialization code within viewDidLoad:
UIView *containerView = [[UIView alloc] initWithFrame:CGRectMake(0.0, 0.0, 100.0, 100.0)];
containerView.backgroundColor = [UIColor greenColor];
[self.view addSubview:containerView];
UIView *backView = [[UIView alloc] initWithFrame:containerView.bounds];
backView.backgroundColor = [UIColor redColor];
[containerView addSubview:backView];
UIView *frontView = [[UIView alloc] initWithFrame:containerView.bounds];
frontView.backgroundColor = [UIColor blueColor];
[containerView addSubview:frontView];
And finally place your animation code within a method:
- (void)flippingViewTransitionAnimation
{
[UIView transitionFromView:frontView
toView:backView
duration:2.0
options:UIViewAnimationOptionTransitionFlipFromRight | UIViewAnimationOptionShowHideTransitionViews
completion:^(BOOL finished) {
[containerView removeFromSuperview];
}];
}
And subsequently call the above method from within viewDidAppear, you should then be able to see the animation run.
I'd like to add a dark view layer that covers the whole screen.
In order to do that, I added UIView object to window property of UIViewController as shown below.I remember I was able to add a view to window like this in ios6. But, it doesn't work in ios7.
How am I able to make it work?
Thanks in advance!!
- (void)viewDidLoad
{
[super viewDidLoad];
UIView *overlayView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, [UIScreen mainScreen].bounds.size.width, [UIScreen mainScreen].bounds.size.height)];
overlayView.backgroundColor = [UIColor blackColor];
overlayView.alpha = 0.8;
[self.view.window addSubview:overlayView];
}
Here's one way of doing what you want:
[[UIApplication sharedApplication].keyWindow addSubview:overlayView];
According to the documentation of UIView, the window property is nil if the view has not yet been added to a window which is the case when viewDidLoad is called.
You can do the same thing in viewDidAppear:(BOOL)animated;
- (void)viewDidAppear:(BOOL)animated; {
UIView *overlayView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, [UIScreen mainScreen].bounds.size.width, [UIScreen mainScreen].bounds.size.height)];
overlayView.backgroundColor = [UIColor blackColor];
overlayView.alpha = 0.8;
[self.view.window addSubview:overlayView];
}
Swift 3
UIApplication.shared.keyWindow?.addSubview(overlayView);
you can try like this
- (void)viewDidLoad
{
[super viewDidLoad];
UIView *overlayView = [[UIView alloc] initWithFrame:self.view.frame];
overlayView.backgroundColor = [UIColor blackColor];
overlayView.alpha = 0.8;
overlayView.center = self.view.center
[self.view addSubview:overlayView];
}
i hope will helpful for you...
Creating a view with following code.
- (void)loadView {
paintView=[[UIView alloc]initWithFrame:CGRectMake(0, 50, 320, 430)];
[paintView setBackgroundColor:[UIColor yellowColor]];
self.view = paintView;
[paintView release];
But my problem is whole screen fills with yellow color, but I want with specified frame.
I am creating this view in a view based application.. Am i doing something wrong, Overridind the original view?
You can do it in following way.
- (void)loadView {
/// make a empty view to self.view
/// after calling [super loadView], self.view won't be nil anymore.
[super loadView];
paintView=[[UIView alloc]initWithFrame:CGRectMake(0, 50, 320, 430)];
[paintView setBackgroundColor:[UIColor yellowColor]];
[self.view addSubview:paintView];
[paintView release];
};
UIView *newView = [[UIView alloc] initWithFrame:CGRectMake(0,0,320,35)];
newView.backgroundColor=[UIColor clearColor];
UITextView *mytext = [[UITextView alloc] initWithFrame:CGRectMake(5.0, 0.0, 100.0, 28.0)];
mytext.backgroundColor = [UIColor clearColor];
mytext.textColor = [UIColor blackColor];
mytext.editable = NO;
mytext.font = [UIFont systemFontOfSize:15];
mytext.text = #"Mytext";
mytext.scrollEnabled=NO;
[mytext release];
[newView addSubview:mytext];
[self.view addSubview:newView];
replace self.view =paintView;
by
[self.view addSubview: paintView];
I am Going change Line No 3 in LoadView Method , you should add the subView in main View instead on assiging it Directly.
[self.view addSubview:paintview];