In my app I need to add a UIView dynamically whenever user taps on a button in my main UIViewController. How can I do this?
Create a new method in your view controller with this signature: -(IBAction) buttonTapped:(id)sender. Save your file. Go to Interface Builder and connect your button to this method (control-click and drag from your button to the view controller [probably your File's owner] and select the -buttonTapped method).
Then implement the method:
-(IBAction) buttonTapped:(id)sender {
// create a new UIView
UIView *newView = [[UIView alloc] initWithFrame:CGRectMake(10,10,100,100)];
// do something, e.g. set the background color to red
newView.backgroundColor = [UIColor redColor];
// add the new view as a subview to an existing one (e.g. self.view)
[self.view addSubview:newView];
// release the newView as -addSubview: will retain it
[newView release];
}
Related
I know how to do this in iOS but cannot figure it how to it in Cocoa.
I want to capture keyboard events and I think I need to override the acceptsFirstResponder method to accomplish that (keyDown method being triggered). So I created a class extending NSCustomView and tried to add it in the main Window but I just cannot understand how to do it. So far I added a Custom View to the main View then tried to add it programmatically like:
TestView *view = [[TestView alloc] init];
[[_window contentView] addSubview:view];
but this is not working. So how can I do this?
To see if the view has been added to a window, you can override the view's viewDidMoveToWindow method and log the value of [self window] to check (if it's nil then the view has been removed from a window):
- (void)viewDidMoveToWindow
{
NSLog(#"window=%p", [self window]);
[super viewDidMoveToWindow];
}
You should be subclassing NSView, not NSCustomView, and initWithFrame is the designated initializer for NSView, not init.
Try:
TestView *view = [[TestView alloc] initWithFrame:NSMakeRect(0, 0, 100, 200)];
[[_window contentView] addSubview:view];
I'm building a collection of forms each of which contains several fields. Some of the fields are UITextFields that will display a date. I've created a new class called DatePickerTextField, a descendant of UITextField. When a DatePickerTextField is tapped I'd like for a UIDatePicker control to appear in a popover.
My question is how do I use the storyboard to implement the popover? I can do a segue when there is a specific, visible control in the scene. But how do I represent a generic popover in the scene that I can attach to any instantiated DatePickerTextField that becomes active?
You can create segue that is not connected to any control but I don't think that there would be way to specify anchor point for popover from code. Another option is to create ViewController that is not connected with any segue. When editing storyboard, create ViewController which will be placed in popover, select it and navigate to Utilities pane->Attributes Inspector. Set Size to Freeform, Status Bar to None, specify unique Identifier that will be used to instantiate ViewController from code. Now you can change the size of ViewController by selecting its View and navigating to Utilities pane->Size Inspector.
After that you can create popover from code:
- (IBAction)buttonPressed:(id)sender {
UIView *anchor = sender;
UIViewController *viewControllerForPopover =
[self.storyboard instantiateViewControllerWithIdentifier:#"yourIdentifier"];
popover = [[UIPopoverController alloc]
initWithContentViewController:viewControllerForPopover];
[popover presentPopoverFromRect:anchor.frame
inView:anchor.superview
permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
}
One caveat is that you need to hold reference to popover as ivar of your class, otherwise it'll crash because UIPopoverController would be released and deallocated after buttonPressed returns:
#interface MyViewController : UIViewController {
// ...
UIPopoverController *popover;
// ...
}
So, I had a similar issue, and in case others might benefit, I figured I'd share it, since I benefit so much from stackoverflow.
This solution allows you to set the anchor of a customizable popover segue. It also allows you to configure the segue to be modal or not (I could not find a way to prevent the segue by dimming the exterior context, so if someone knows how to do that, I would be interested in hearing it); this is accomplished by setting the passthrough views for the popover controller. I also added the capacity to specify a custom view, rather than the view of the source viewcontroller (since I needed this capacity); this portion is not critical to the solution.
DynamicPopoverSegue.h
#interface DynamicPopoverSegue : UIStoryboardPopoverSegue
#property BOOL isModal;
#property UIView* sourceView;
#property CGRect anchor;
#end
DynamicPopoverSegue.m
#implementation DynamicPopoverSegue
- (void)perform
{
if (!self.popoverController.popoverVisible)
{
UIViewController* dst = (UIViewController*)self.destinationViewController;
UIViewController* src = (UIViewController*)self.sourceViewController;
UIView* inView = _sourceView ? _sourceView : src.view;
self.popoverController.contentViewController = dst;
if (!_isModal)
{
[self.popoverController setPassthroughViews:[[NSArray alloc] initWithObjects:inView, nil]];
}
[self.popoverController presentPopoverFromRect:_anchor
inView:inView
permittedArrowDirections:UIPopoverArrowDirectionAny
animated:YES];
}
}
#end
Then you just set your segue to "Custom" in the storyboard, and set the segue class to "DynamicPopoverSegue". In my case, since I wanted to associate it with dynamic layers in a view, I could not set the anchor, so I created the segue by control clicking from the view controller icon in the bar beneath my view controller to the view controller I was using to present the popupover.
To call the popover segue:
[self performSegueWithIdentifier:#"MyPopoverSegue" sender:self];
And to configure the popover segue:
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if ([[segue identifier] isEqualToString:#"MyPopoverSegue"])
{
DynamicPopoverSegue* popoverSegue = (DynamicPopoverSegue*)segue;
// set the anchor to wherever you want it to be
popoverSegue.anchor = _destinationFrame;
}
}
- (IBAction)pressItemChooseOprateRoom:(id)sender {
if (isPad){
// UIView *anchor = sender;
UIViewController *viewControllerForPopover =
[self.storyboard instantiateViewControllerWithIdentifier:#"OperateRoomList"];
_myPopover = [[UIPopoverController alloc]
initWithContentViewController:viewControllerForPopover];
CGRect rc=[self getBarItemRc:sender];
[_myPopover presentPopoverFromRect:rc
inView:self.view
permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
[MLControl shared].popover =self;
// [self perfformSegueWithIdentifier:SEGUE_POP_OPERATEROOM sender:self];
}else{
[self iphoneOpenOperateRoomList];
/* [self performSegueWithIdentifier:#"iPhonePushOperateRoom" sender:self];
*/
}
}
-(void)iphoneOpenOperateRoomList{
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"Main" bundle:nil];
UIViewController *vc = [storyboard instantiateViewControllerWithIdentifier:#"OperateRoomList"];
// if (!index.showTabBar) {
// vc.hidesBottomBarWhenPushed = YES;
// }
[self.navigationController pushViewController:vc animated:YES];
}
Just used the answer from Jonnywho for my SWIFT project. In case you need it:
Here's the SWIFT version:
let anchor: UIView = sender
var viewControllerForPopover = self.storyboard?.instantiateViewControllerWithIdentifier("GameAboutViewController") as! UIViewController?
let popover = UIPopoverController(contentViewController: viewControllerForPopover!)
popover.presentPopoverFromRect(anchor.frame, inView: anchor, permittedArrowDirections: UIPopoverArrowDirection.Any, animated: true)
Add a UIView in the scene dock.
You can add it as a subview to any existing view on the view controller.
You can then toggle it's isHidden property as you require.
You can add multiple such subviews and create many such popups.
This technique will save you from setting up a new View Controller and using segues.
I am using IKImageFlowView in my application and need to add a nsbutton over it,
I am using the code as given below,
In my .h file
IBOutlet id browserView;
in nib added a custom view and changed its class as myImageFlowView as I am subclassing from IKImageFlowView as
#interface myImageFlowView : IKImageFlowView
and in my appController class I am trying to add button to browserView with following code snippet,
NSRect initialFrame = NSMakeRect(20.0, 50.0, 100.0, 100.0);
NSButton *myBtn = [[NSButton alloc] init];
[myBtn setFrame:initialFrame];
[myBtn setBordered:NO];
[myBtn setAutoresizesSubviews:TRUE];
[myBtn.cell setImageScaling:NSImageScaleAxesIndependently];
[myBtn setImage:[NSImage imageNamed:#"AppleColor.png"]];
[browserView addSubview:myBtn];
I am not able to add this button as a subview to IKImageFlowView,I can add button to NSView.
What I am doing wrong.Please help.
In a view of my program I have a button and with this button I open a subview; this subview is a view with a tableview. I want go to another view when I push a row of the tableview so I want to make this with a navigation controller; how can I do this?
Your table view delegate will receive a tableView:didSelectRowAtIndexPath: message when you click on one of the table's rows.
You can put there your code to create the UINavigationController and push on to it your new view.
This sample code (from another answer of mine on S.O.) shows how you can do that:
UINavigationController* navigation = [[UINavigationController alloc] init];
iVkViewController *overviewViewController = [[iVkViewController alloc] init];
overviewViewController.title = #"First";
[navigation pushViewController:overviewViewController animated:NO];
This should help you getting things on track.
One side note: you might think of having a navigation controller from the very start, this would make your UI more "well-behaved", but this depends ultimately on your app requirements.
If UIViewController addSubView a view of UITableViewController,you want to push in the method of tableView:didSelectRowAtIndexPath,you should check if self.navigationController is nil. If it's nil,You probably should use
[self.parentViewController.navigationController pushViewController:controller animated:YES];
if self.parentViewController is also nil,Sometimes,you have to set a #property to point out the parentViewController In UITableViewController,like:
#property (nonatomic, weak) UIViewController *parentVC;
and in UIViewController:
UITableViewController *tableViewVC = [[UITableViewController alloc] init];
tableViewVC.parentVC = self;
In UITableViewController ,-tableView:didSelectRowAtIndexPath:
[self.parentVC.navigationController pushViewController:controller animated:YES];
How can I create a popover and fill it with a tableview? I have a button on a toolbar in bottom of my view, and when i push this button I want to show this popover
Create pushviewcontroller and in the pushviewcontroller you have to give the tableview.
like this.
UIViewController *myPopOver = [[UIViewController alloc] initWithNibName:#"MyPopOverView" bundle:nil];
//(asper your requirement take thiscontroller as tableview)
popoverController = [[[UIPopoverController alloc] initWithContentViewController:myPopOver] retain];