i want to add an UIView for small size as a subview to existing view.
i have a UIViewController pushed with a nib name which is the main view, i am trying to create an object of UIView and alloc it with dimension with the following code in the viewcontroller's viewDidLoad methoad
UIView *view = [[UIView alloc] init];
but the idea is not suggesting the alloc on UIView and throwing an error if i forcefully type and run
please help me out with this
To add something (rather important) to the answers above;
CGRect frame = CGRectMake(x, y, width, height); // Replacing with your dimensions
UIView *view = [[UIView alloc] initWithFrame:frame];
Then, you want to actually add it to the superview (assuming the view is self.view)
[self.view addSubview:view];
UIView needs to be alloc'ed and init'ed with a frame:
CGRect frame = CGRectMake(x, y, width, height); // Replacing with your dimensions
UIView *view = [[UIView alloc] initWithFrame:frame];
UIView *view = [[UIView alloc] init];
Related
I'm building view without .xib file, just using loadView method. But in the point, when loadView is called, the frame of view is yet unknown. So, I use it just to build view hierarchy without concrete frames. (Than I update view's layout when it's frame is known.)
The question is: should I use [[UIView alloc] init] or [[UIView alloc] initWithFrame:CGRectZero] or may be something else, to initialize view without known frame?
Here is the code:
- (void)loadView
{
UIView *containerView = [[UIView alloc] init];
// or
// UIView *containerView = [[UIView alloc] initWithFrame:CGRectZero];
// or something else?
// ...
self.view = containerView;
[containerView release];
}
- (id)initWithFrame: is the designated initializer for UIView, so you should use that, with a zero-sized rect.
I have one view Controller and one UIView now in my ViewController when i click barButton than second view will apear like popup,now i want to add page controller and scrollview in that second view, my second view is not UIViewController but it is UIView.so how can i do that...
my first view is "ImageViewController" and second view is "PopupView"
in ImageViewController.m
#import "PopupView.h"
#implementation ImageViewController
- (void)viewDidLoad
{
UIBarButtonItem *clipArt = [[UIBarButtonItem alloc] initWithTitle:#"Clip Art"
style:UIBarButtonItemStyleBordered
target:self
action:#selector(popUpView:)];
}
- (void)popUpView:(id)sender {
CGRect * imageFrame = CGRectMake(10, 90, 300, 300);
PopupView *popUpView = [[PopupView alloc] initWithFrame:imageFrame];
[self.view addSubview:popUpView];
}
And in PopupView.m
- (id)initWithFrame:(CGRect)frame
{
if (self) {
CGRect * imageFrame = CGRectMake(0, 0, 300, 300);
self = [super initWithFrame:frame];
UIImageView *starImgView = [[UIImageView alloc] initWithFrame:imageFrame]; //create ImageView
starImgView.alpha =0.8;
starImgView.layer.cornerRadius = 15;
starImgView.layer.masksToBounds = YES;
starImgView.image = [UIImage imageNamed:#"black"];
[self addSubview:starImgView];
self.backgroundColor = [UIColor clearColor];
}
return self;
}
Implement like this in the second view, for scroll view with page control (this example illustrates the scenario for two views):
CGRect scrollViewFrame = CGRectMake(ur dimensions for scroll view);
UIScrollView *myScrollView = [[UIScrollView alloc] initWithFrame:scrollViewFrame];
myScrollView.pagingEnabled = YES;
myScrollView.contentSize = CGSizeMake(scrollViewFrame.size.width * 2, scrollViewFrame.size.height);
//content size is the actual size of the content to be displayed in the scroll view.
//Since, here we want to add two views so multiplied the width by two.
CGRect viewFrame = [myScrollView bounds];
UIView *view1 = [[UIView alloc] initWithFrame:viewFrame];
viewFrame.origin.x = viewFrame.size.width; //setting the offset so that view2 is next to view 1
UIView *view2 = [[UIView alloc] initWithFrame:viewFrame];
//add both the view to scroll view
[myScrollView addSubview:view1];
[myScrollView addSubview:view2];
//add scroll view to parent view
[self addSubview:myScrollView];
You can replace the view1/2 with any visual element. To have scrolling with page control make sure all the view that you want to add to scrollview are so same width/height. That way it work out of the box and you wont have to do anything. Also, its always a good idea to add UIPageControl to the view for giving user some kind of feedback. Its optional though.
One more thing, if you want horizontal scrolling with page control, increase the width as done above. If you want vertical scrolling, increase the height and keep the width same.
I am trying to add a UIView over the current view, but having no luck.. I am sure my code is correct but not sure what else to check, what else should I be thikning about when inserting subviews
this is what I have added into viewDidLoad
//..
cellContainer = [[UIView alloc] init];
cellContainer.frame = CGRectMake(0.0, 480.0, 320.0, 300.0);
[self.view addSubview:cellContainer];
self.view.backgroundColor = [UIColor greenColor];
//..
cellContainer is declared in the header as a UIView... any help would be appreciated.
cellContainer is likely getting added to the view hierarchy of of the UIViewController, but you've set the frame such that it is offscreen. Try this:
cellContainer = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 300)];
[self.view addSubview:cellContainer];
self.view.backgroundColor = [UIColor greenColor];
This will display cellContainer at the top left of the view, extending 320px in the right-x direction, and 300px in the down-y direction.
I need to add a Button or a label to a UIView and add it to my UIViewController. I did the following but it only crashed the program.
UIView *myview = [[UIView alloc] initWithFrame:CGRectMake(100, 100, 0, 300)] ;
[myview addSubview:myButton];
[self.view addSubview:myView];
The code crashes. Why is that?
You set your myview's width to 0.
You sure you created "myButton"?
You create myview but you add my*V*iew as subview. Is there any warning?
The first step you need to take is:
Make Sure you have allocated & initialized UIButton object with "initWithFrame" method.
provide a width to your UIView in "initWithframe" method, So that it can be seen.
Now use your [self.view addSubview:myView];
Please let me know if it is useful.
Use:
//Assuming that myview should have the size of the main view:
UIView *myview = [[UIView alloc] initWithFrame:self.view.bounds];
[myview addSubview:myButton]; //Whatever ...
[self.view addSubview:myview]; //There was a typo in this line
If this code block is in the init or loadView of viewcontroller, this will crash.
Make sure you have created a view for view controller in this case before adding views to self.view
UIView *aView = [[UIView alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame]];
self.view = aView;
[aView release];
myButton = [[UIButton alloc] init....
.....
UIView *myView = [[UIView alloc] initWithFrame:CGRectMake(100, 100, 0, 300)] ;
[myView addSubview:myButton];
[self.view addSubview:myView];
Try updating the view with the following:
[myview setNeedsDisplay];
and remove the second call to addSubView (which is probably causing the crash):
[self.view addSubview:myView];
I have created a UIScrollView and am now trying to place a UIButton over the scroll view. However when I build and run the application the scroll view still works fine but I cannot see the UIButton.
I link the UIButton IBOutlet inside the interface builder.
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
scrollView = [[UIScrollView alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame]];
scrollView.backgroundColor = [UIColor blackColor];
scrollView.delegate = self;
scrollView.bounces = NO;
backgroundImage = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"auckland-300.jpg"]];
image = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"249a-134206f1d00-1342071f5d9.ImgPlayerAUCKLAND.png"]];
// Note here you should size the container view appropriately and layout backgroundImage and image accordingly.
containerView = [[UIView alloc] initWithFrame:CGRectMake(0,0,601,601)];
playButton = [[UIButton alloc] init]; //test button cannot see it.
[containerView addSubview:backgroundImage];
[containerView addSubview:image];
scrollView.contentSize = containerView.frame.size;
[scrollView addSubview:containerView];
scrollView.minimumZoomScale = 0.5;
scrollView.maximumZoomScale = 31.0;
[scrollView setZoomScale:scrollView.minimumZoomScale];
self.view = scrollView;
}
Any help would be appreciated
Everything seems ok. But I think the reason you are not able to see the button playButton is because you are not adding it to the view itself.
Dont you need to do this ? [containerView addSubview:playButton];
To help you out, here's what I do for debugging -
UIView implements a useful description method. In addition, it
implements a recursiveDescription method that you can call to get a
summary of an entire view hierarchy.
NSLog(#"%#", [controller.view recursiveDescription]);
The button is probably in the nib that you linked the controllers view to, right? By assigning the scrollview to the view, you remove the view from
The nib from the controller, that's why you can't see te button or press it.
You can either place the button in the scrollview or you add both scrollView and thenthe playButton as subviews of self.view.
Maybe you want to rethink your design tho.
Placing a button over a scrollview doesn't really seem like good practice to me.