I put a button on view and want to call this view from another view and change size of this view but when i change size,size of button doesn't change How can i change size of view that size of all controls on view changed?
Three *second = [[Three alloc] initWithNibName:#"Three" bundle:nil];
second.view.frame=CGRectMake(0, 0, 100, 100);
[self.view addSubview:second.view];
When the time comes to change the size of the view, at the following code.
second.view.frame = CGRectMake(a,b,c,d);
Where a, b, c, and d are integers.
Set the frame for the view in the Interface Builder, you're using a nib anyway.
But I think it's really strange what you made. You create a UIViewController and set the view of this controller as a subview of another controller's view. Why don't you directly compose that view in the same nib?
Related
I got a view controller (lets call it MainViewContoller) that's present 3 different tables (one in a time), user can tap a segment control to switch between those tables.
To present those 3 tables, MainViewContoller has 3 other view controllers (A, B and C), each has a UITableView as a subview and handle it's own data.
When a MainViewContoller is loaded, it initiate controllers A, B and C, and add their tableViews to it's view:
- (void)viewDidLoad {
[super viewDidLoad];
ViewControllerA *vcA = [ViewControllerA alloc] init];
[self.view addSubview:vcA.view];
ViewControllerB *vcB = [ViewControllerB alloc] init];
[self.view addSubview:vcB.view];
ViewControllerC *vcC = [ViewControllerC alloc] init];
[self.view addSubview:vcC.view];
}
So for example when user tap the segment control and choose A, the MainViewContoller hide tables B and C, and unhide table A. Something like this:
if (userTapOnA) {
self.viewControllerA.tableView.hidden = NO;
self.viewControllerB.tableView.hidden = YES;
self.viewControllerC.tableView.hidden = YES;
}
The problem:
When user tap the status bar I want that the current visible table will scroll to top.
This behavior is pretty basic and one gets it for free when using a regular view controller, but as you can see my view controller is not regular.
I suppose that by using other controllers view as MainViewContoller view I break the default behavior, so my MainViewContoller doesn't handle the status bar tap.
Someone got an idea how to solve that?
This is directly from the UIScrollView header file:
/* When the user taps the status bar, the scroll view beneath the
touch which is closest to the status bar will be scrolled to top, but
only if its scrollsToTop property is YES, its delegate does not
return NO from shouldScrollViewScrollToTop, and it is not already at
the top. On iPhone, we execute this gesture only if there's one
on-screen scroll view with scrollsToTop == YES. If more than one is
found, none will be scrolled. */
#property(nonatomic) BOOL scrollsToTop; // default is YES.
So in your case, set all scrollsToTop to NO, except the one you want to enable at that particular moment.
You should register your nested controllers as child controllers.
[self addChildViewController:vcA];
[self addChildViewController:vcB];
[self addChildViewController:vcC];
I'm not sure if this will help to solve your issue, but that's the right way to do it.
I have added a subview over my UITableView using:
TransparentViewController *tvc =
[[TransparentViewController alloc]
initWithNibName:#"TransparentViewController" bundle:nil];
[self.view addSubview:tvc.view];
My Nib has a UIImageView in it that has some text and a transparent background.
When I load the detailView for the table for the first time I show the subview that gives a brief explanation of the information that you can see below the text. Works really well.
What i would like to do is alter the alpha of the underlying table so that it is dimmer but not affect the alpha of the overlay subview. If i use:
[self.view setAlpha:(CGFloat)];
It dims the overlay as well. I seem to be having a mental block.
Changing the alpha affects the subviews as well. Your tvc.view is a subview of self.view, so it is naturally going to be affected.
Why don't you try this: put another view in tvc.view and send this view to this view to the back.
(UIView*) back = [[UIView alloc] initWithFrame:CGFrameMake(...)];
back.backgroundColor = [UIColor grayColor]; // choose a color that you like;
back.alpha = 0.5; // whatever works for you
[tvc.view addSubview:back];
[tvc.view sendSubviewToBack:back];
Set the size and alpha of this new view to something you like. The table view will show through it to a limited extent, which may accomplish what you are trying to do.
Since this is part of our tvc view, it will appear when you show that view and go away when you hide that view.
I have created a tab based application for iphone. when the 1st tab presses a first view will present. this view contains a button, on pressing it another view loads.
Code is:
-(IBAction)buttonPressed: (id) sender
{
Cities *cv=[[Cities alloc] initWithNibName:#"Cities" bundle:nil];
cv.modalTransitionStyle=UIModalTransitionStyleCoverVertical;
[self presentModalViewController:cv animated:YES];
[cv release];
}
Now problem is that this view is loading in whole screen so that I am not able to access tab bar.
I have set the frame for this view and the view is loading in this frame,
-(void)viewWillAppear:(BOOL)animated
{
self.view.frame = CGRectMake(0, 0, self.view.frame.size.width, 400);
}
but in remaining part white screen is appearing means tab bar is not accessible.
I want that whatever will be load at any time tab bar should be always accessible.
Please help me out.
Add
cv.modalPresentationStyle = UIModalPresentationCurrentContext;
Have you tried using UINavigationController inside your tabbar to dig inside your UIViewControllers??
for Ref : Adding NavigationController to Tabbar
do you really need a viewController Class for what you are trying to display??
if der's no core functionality being used, i think it will be much easier with UIView.
Happy Coding :)
I am presenting a modal view controller. If it matters, it is scrolling up from the bottom. How can I control what portion of the screen it occupies?
EDIT: I have the following in the modal view controller. It's not helping.
- (void)viewDidLoad {
TestResultView *trv = [[TestResultView alloc]initWithTest: [Model m].currentTest];
self.view = trv;
trv.frame = CGRectMake(0, 320, 320, 160);
[trv release];
[super viewDidLoad];
}
You can modify the frame of the view controller, but if you're using UIViewController's -presentModalViewController:animated: method, the view behind will be unloaded once your modal view is finished animating onto the screen (This assumes you're on an iPhone) and you'll see a white screen where your background view should be. iOS assumes that your modal view controller will be a full-screen view controller, and dumps the other view to save memory.
If you really want to show a view over part of the screen, you should instead add the UIView (no UIViewController) to your current UIViewController's view as a subview, and then animate it onscreen yourself. I think something like this would work in your UIViewController class that will present the view:
// Add the view as a subview and position it offscreen just below the current view
UIView *myHalfView = [[UIView alloc] initWithFrame:someAppropriateFrame];
[self.view addSubview:myHalfView];
CGRect offScreenFrame = myHalfView.bounds;
offScreenFrame.origin = CGPointMake(0.0, CGRectGetMaxY(self.view.frame));
// Now animate the view upwards
[UIView beginAnimations:nil context:nil];
// Move the view upwards the height of your sliding view so it's entirely onscreen
myHalfView.center = CGPointMake(myHalfView.center.x, myHalfView.center.y - myHalfView.bounds.size.height);
[UIView commitAnimations];
[myHalfView release];
For bonus points, you could fade the view in by setting
myHalfView.alpha = 0.0;
before the UIView animation block, and setting
myHalfView.alpha = 1.0;
inside the block after animating the center property.
When you're done, you can do something similar but in reverse to slide the view offscreen. You can add an animationDidStop selector to the UIView animation block to be notified when the view has slid off screen so that you can remove it from the view hierarchy.
From an aesthetic point of view, you should also be careful how you do this since having a view slide up is a standard behavior, and if your view looks like a normal view but stops halfway, users may feel (even briefly) that the app has frozen. They'll figure it out, but it will leave a bad feeling about your app if not handled carefully. Mainly, I would avoid using standard full-screen cues like including a UINavigationController at the top of your view to help users understand what's going on. Half-sheets tend to be UIActionSheets on the iPhone, so think in that direction.
That is nice, the above accepted answer explains a nice hack to present subViews which feel like ModalViews, but what if it is an iPad, and i can indeed give it a modalViewController which doesnt cover the entire screen.
In case of iPads, I dont think the underneath view will be unloaded. ( because there are options where we can present the modalView on iPads, which dont cover the entire screen )
ModalViewController in the end is a controller itself, and like any other controller has a root view, whose properties can be editted, if we can get hold of it.
Here is what will give you a custom frame of the ModalView :
MyViewController *viewController = [[MyViewController alloc] init];
viewConroller.modalPresentationStyle = UIModalPresentationFormSheet;
[self presentModalViewController:viewController animated:YES];
//superView of viewController's view is modalViewController's view, which we were after
viewController.view.superview.frame = CGRectMake(x,y,w,h);
//x y w h - can have desired values.
I would add to #dsaw's answer that the superview of the modal view does not seem to rotate its coordinate system in landscape mode. Here is the code that I used in my own app:
MyViewController* modalVC = [[MyViewController alloc] init];
modalVC.modalPresentationStyle = UIModalPresentationFormSheet;
[self presentModalViewController:modalVC animated:NO];
CGRect r = CGRectMake(self.view.bounds.size.width/2 - 236,
self.view.bounds.size.height/2 - 130,
472, 260);
r = [self.view convertRect:r toView:modalVC.view.superview.superview];
modalVC.view.superview.frame = r;
While the superview may not rotate itself with the iPad, it does seem to do the right thing and keep the modal view centered if I rotate the iPad after showing the modal view.
Below shows the default position when you add a grouped table to a view? How do I push the entire grouped table down in the view?
(source: pessoal.org)
You can assign a transparent view with a fixed height to the tableHeaderView property of the tableView. This will push the table contents down by the height of the transparent view.
You can do this from your UITableViewController's viewDidLoad:
// force the table down 70 pixels
CGRect headerFrame = self.tableView.bounds;
headerFrame.size.height = 70;
UIView *header = [[UIView alloc] initWithFrame: headerFrame];
header.backgroundColor = [UIColor clearColor];
self.tableView.tableViewHeader = header;
[header release];
Look at the delagate to the UITableView.
You will find a property 'heightForHeaderInSection'.
For section 0 just make the header larger (default is 0) it will push the table down the view.
If you are moving the table down, you undoubtedly wish to use the space you gain to add UI elements.
At that point, consider building the page in IB. You can resize the table view to be where you like and put the UI elements above the table. You can use a UIViewController to manage the page and add the UITableViewDelegate/Datasource protocol methods so that you can wire the UITableView back to your view controller as a delegate... then you can also wire the other UI elements to the same view controller.
The simplest way to do it is probably just to modify the frame for the tableview. You'll need to get a reference to the tableview in your controller either through an IBOutlet or by finding the view in the view hierarchy OR you can change the frame in Interface Builder.
In code something like:
tableView.frame = CGRectMake(0.0, 200.0, 320.0, 280.0);
Would position the tableview down the screen and limit its height - the dimensions you use will be dependent on whether you had a tab bar on the view and things like that.
In interface build just select the tableview, then choose the Size inspector (the inspector tab with the ruler icon) and set the height and y offset to shift it down the view.