I have three views,
View1 <-- View2 --> View3
Now View2 on leftSWipeGesture will send me to VIew3 while on right Gesture send to View1
My problem is, LeftGesture is working fine But not right gesture. I am using push Segue on both
Here is my Code
- (void) screenSwiped
{
[self performSegueWithIdentifier:#"tourSegue1" sender:self];
}
- (void) screenSwipedRight
{
[self performSegueWithIdentifier:#"tourSegue2" sender:self];
}
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad
{
UISwipeGestureRecognizer *swipeLeft = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:#selector(screenSwiped)];
swipeLeft.numberOfTouchesRequired = 1;
swipeLeft.direction = UISwipeGestureRecognizerDirectionLeft;
[self.view addGestureRecognizer:swipeLeft];
UISwipeGestureRecognizer *swipeRight = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:#selector(screenSwipedRight)];
swipeRight.numberOfTouchesRequired = 1;
swipeRight.direction = UISwipeGestureRecognizerDirectionRight;
[self.view addGestureRecognizer:swipeRight];
[super viewDidLoad];
}
The view structure you present at the start of your post is slightly misleading. From that little diagram it appears that you're already in View 2, and going to View 1 should be a "popViewController" if you're in a navigation controller.
So firstly - please verify this information and make sure you don't need to "popViewController" instead of performWithSequeIdentifier (because it doesn't work going backwards like that).
Related
I'm trying to create a UIView class that acts like a button. I want to do it entirely programmatically. I am able to get the button to appear but it is not clicking properly.
In my classes implementation file I have an initialization method as well as the following:
- (void)handlePress:(UILongPressGestureRecognizer *)sender{
if(sender.state == UIGestureRecognizerStateBegan){
NSLog(#"in handlePress");
}
}
In my view controller implementation file I have:
- (void)viewDidLoad
{
[super viewDidLoad];
self.button = [[buttonclass alloc] initButton];
[self.view addSubview: self.button];
UILongPressGestureRecognizer *singlePress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:#selector(handlePress:)];
[self.button.buttonView addGestureRecognizer:singlePress];
}
(button being the instance variable of the class buttonclass and buttonView is just a subview of button)
I'm pretty sure the problem is within the lines:
UILongPressGestureRecognizer *singlePress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:#selector(handlePress:)];
[self.button.buttonView addGestureRecognizer:singlePress];
I'm not even sure if these lines should go within the button initialization function or in the view controller implementation file. Should I add the following line?
singlePress.delegate = self;
I tried adding that line but I do not know where to put it and an error is saying that the delegate and self aren't the same type. Regardless, something is going wrong when I try to hook up the GestureRecognizer to the action or when I'm hooking the GestureRecognizer to the UIView button.
Any help would be greatly appreciated! Thanks and have a great day.
You should add the gesture on button and not on to the subview of button.
UILongPressGestureRecognizer *singlePress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:#selector(handlePress:)];
[self.button addGestureRecognizer:singlePress];
There is no need to add following line:
singlePress.delegate = self;
In addition dont forget to release the Button object otherwise you will get an memory leak maybe in case you forget to clean up...
[super viewDidLoad];
self.button = [[buttonclass alloc] initButton];
[self.view addSubview: self.button];
[self.button release];
regards
I have problem with swipe with three gestures
in my .m :
- (IBAction)click:(id)sender {
[_text setText:#"Hello World"];
}
- (IBAction)resetText:(id)sender {
[_text setText:#"Reset"];
}
when I clicked on the screen the output message "Hello World" will be shown on label
and it should shown "Reset" when I swipe three fingers from up to down, but it crashes
the weird thing is when I change the name of IBAction from "resetText" to for example "reset" or whatever name without capital letter it works. With any capital letter, it crashes
this is the Xcode file
I looked at your example project, and it seems that:
The crash only occurs on actual devices
The crash only occurs when the swipe gesture requires 3 or more touches
This looks to me like a bug in the UIGestureRecognizer class when added using Interface Builder, so there isn't much you can do about it now. I filed a radar (#14399827) with Apple describing this issue. You should probably do this as well.
However, you can work around this bug by creating the gesture recogniser in code instead of in the storyboard as you are now.
Remove the gesture recogniser from your storyboard (delete it completely), then add this to the viewDidLoad method in your view controller:
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
UISwipeGestureRecognizer *recogniser = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:#selector(resetText:)];
[recogniser setDirection:UISwipeGestureRecognizerDirectionDown];
[recogniser setNumberOfTouchesRequired:3];
[self.view addGestureRecognizer:recogniser];
}
I understand that this isn't ideal, as it may be more convenient in some cases to add the view controller directly to the storyboard, but unfortunately it seems that you can't currently do that due a bug in Apple's implementation.
I updated your view controller and now it is working for all gestures you want. Please check out and let me know.
- (void)viewDidLoad{
[super viewDidLoad];
//gesture for tap
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(click)];
[self.view addGestureRecognizer:tap];
//gesture for right swipe
UISwipeGestureRecognizer *rightRecognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:#selector(rightSwipeHandle:)];
rightRecognizer.direction = UISwipeGestureRecognizerDirectionRight;
[rightRecognizer setNumberOfTouchesRequired:1];
[self.view addGestureRecognizer:rightRecognizer];
[rightRecognizer release];
//gesture for right swipe
UISwipeGestureRecognizer *leftRecognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:#selector(leftSwipeHandle:)];
leftRecognizer.direction = UISwipeGestureRecognizerDirectionLeft;
[leftRecognizer setNumberOfTouchesRequired:1];
[self.view addGestureRecognizer:leftRecognizer];
[leftRecognizer release];}
- (void)rightSwipeHandle:(UISwipeGestureRecognizer*)gestureRecognizer{ [_text setText:#" World"]; }
- (void)leftSwipeHandle:(UISwipeGestureRecognizer*)gestureRecognizer{ [_text setText:#"World"]; }
- (void)click{ [_text setText:#"Hello World"]; }
In my iPad Application I have multiple views on a screen.
What I want to do is apply a double tap Gesture Recognizer to the Navigation Bar. But I had no success, however when the same gesture recognizer applied to that view it works.
Here is the code I am using:
// Create gesture recognizer, notice the selector method
UITapGestureRecognizer *oneFingerTwoTaps =
[[[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(oneFingerTwoTaps)] autorelease];
// Set required taps and number of touches
[oneFingerTwoTaps setNumberOfTapsRequired:2];
[oneFingerTwoTaps setNumberOfTouchesRequired:1];
[self.view addGestureRecognizer:oneFingerTwoTaps];
This works on view, but when this is done:
[self.navigationController.navigationBar addGestureRecognizer:oneFingerTwoTaps]
doesn't work.
For anyone else viewing this, here is a much simpler way to do this.
[self.navigationController.view addGestureRecognizer:oneFingerTwoTaps];
For this you need to subclass UINavigationBar, override the init button in it and add your gesture recognizer there.
So say you make a subclass called 'CustomNavigationBar' - in your m file you would have an init method like this:
- (id)initWithCoder:(NSCoder *)aDecoder
{
if ((self = [super initWithCoder:aDecoder]))
{
UISwipeGestureRecognizer *swipeRight;
swipeRight = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:#selector(didSwipeRight:)];
[swipeRight setDirection:UISwipeGestureRecognizerDirectionRight];
[swipeRight setNumberOfTouchesRequired:1];
[swipeRight setEnabled:YES];
[self addGestureRecognizer:swipeRight];
}
return self;
}
Then you need to set the class name of your navigation bar in interface builder to the name of your subclass.
Also it's handy to add a delegate protocol to your navigation bar to listen for methods sent at the end of your gestures. For example - in the case of the above swipe right:
#protocol CustomNavigationbarDelegate <NSObject>
- (void)customNavBarDidFinishSwipeRight;
#end
then in the m file - on the gesture recognised method (whatever you make it) you can trigger this delegate method.
Hope this helps
I'm not sure how to do this. So I originally had a ViewController that had one .xib, with one main view. I present it like this:
DogViewController *dvc = [[DogViewController alloc] initWithNibName:#"DogViewController" bundle:nil];
dvc.modalPresentationStyle = UIModalPresentationFormSheet;
dvc.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
[self presentModalViewController:dvc animated:YES];
[dvc release];
So that works fine. However now from a button press in the DogViewController.xib, I want to dismiss the current form sheet, and show another form sheet with some additional questions before proceeding. So I started by adding another view to in my original .xib of DogViewController, then got stuck in the logic of how to dismiss the first one, and show the second one. I'm assuming I need some outlet to the new view in the same .xib, but from there I'm lost. Thanks.
The way to do this would be to set it up with a UINavigationController as Mathiew mentions. However, if you really want to transition between two views on one view controller, you can refer to this sample code from Apple:
http://developer.apple.com/library/ios/#samplecode/ViewTransitions/Introduction/Intro.html
The code uses ImageViews to demonstrate the effect but I don't see why you can't use views instead :)
You can add a view within the other view in front of all of the other objects and just use its hidden property to control whether it's shown or not.
Why don't you use a navigation controller in your modal view, create another xib and do a [self.navigationController pushViewController:secondViewController animated:YES];
If you have a good reason, you can set a second view outlet secondView and use code like
UIView* superview = [self.view superview];
[self.view removeFromSuperView];
[superview addSubview:self.secondView];
Very simple solution is to hold reference to MainViewController and call methods on it that swap between two view controllers.
Like this:
#implementation MainViewController
- (void)showDogViewController {
[self dismissModalViewControllerAnimated:YES];
DogViewController *dvc = [[DogViewController alloc] initWithNibName:#"DogViewController" bundle:nil];
dvc.modalPresentationStyle = UIModalPresentationFormSheet;
dvc.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
dvc.mainViewController = self;
[self presentModalViewController:dvc animated:YES];
[dvc release];
}
- (void)showCatViewController {
[self dismissModalViewControllerAnimated:YES];
CatViewController *cvc = [[CatViewController alloc] initWithNibName:#"CatViewController" bundle:nil];
cvc.modalPresentationStyle = UIModalPresentationFormSheet;
cvc.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
cvc.mainViewController = self;
[self presentModalViewController:cvc animated:YES];
[dvc release];
}
}
#end
#implementation DogViewController
- (void)showCatViewController {
[mainViewController showCatViewController]
}
#end
#implementation CatViewController
- (void)showDogViewController {
[mainViewController showDogViewController]
}
#end
hours ago I post a question on organizing portrait and landscape mode in iPhone and now I think I know how to do it using willRotateToInterfaceOrientation:duration.
The first screen is 'Map View' with one button that leads to 'Setting View'. The Map View does not support rotate but for the Setting View I made separate view for portrait and landscape and they swap accordingly when rotated.
, ,
As you can see when Setting button pressed SettingView is added on the view stack as usual. So basically I use three view controllers; Setting, SettingLandscape and SettingPortrait.
I still found problem in rotating view in iPhone when I use navigationViewController. Segmented control is not working. it crashes without error message. It used to working fine without rotation.- when I'm not using multiple view for rotation-.
rotateViewController.m
This is root view controller.
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
return YES;
}
-(IBAction) buttonPressed{
Setting *settingViewController = [[Setting alloc] initWithNibName:#"Setting" bundle:[NSBundle mainBundle]];
UINavigationController *navController1 = [[UINavigationController alloc] initWithRootViewController: settingViewController];
[self.navigationController presentModalViewController:navController1 animated:YES];
[settingViewController release];
[navController1 release];
}
Setting.m
This view controller does nothing but swap views when rotate and shows appropriate view between portrait and landscape.
In Setting.m, I swap view as follow;
- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration {
if (toInterfaceOrientation==UIInterfaceOrientationLandscapeRight) {
NSLog(#"to Right");
SettingLandscape *setting_landscape = [[SettingLandscape alloc] initWithNibName:#"SettingLandscape" bundle:[NSBundle mainBundle]];
self.view = setting_landscape.view;
[setting_landscape release];
}
if (toInterfaceOrientation==UIInterfaceOrientationLandscapeLeft) {
NSLog(#"to Left");
SettingLandscape *setting_landscape = [[SettingLandscape alloc] initWithNibName:#"SettingLandscape" bundle:[NSBundle mainBundle]];
self.view = setting_landscape.view;
[setting_landscape release];
}
if (toInterfaceOrientation==UIInterfaceOrientationPortrait) {
NSLog(#"to Portrait");
SettingPortrait *settingportrait = [[SettingPortrait alloc] initWithNibName:#"SettingPortrait" bundle:[NSBundle mainBundle]];
self.view = settingportrait.view;
[settingportrait release];
}
if (toInterfaceOrientation==UIInterfaceOrientationPortraitUpsideDown) {
NSLog(#"to PortraitUpsideDown");
SettingPortrait *settingportrait = [[SettingPortrait alloc] initWithNibName:#"SettingPortrait" bundle:[NSBundle mainBundle]];
self.view = settingportrait.view;
[settingportrait release];
}
}
In viewWillAppear, Setting view controller also has ;
self.title = #"Shell ";
self.navigationController.navigationBarHidden = NO;
self.navigationItem.leftBarButtonItem = [[[UIBarButtonItem alloc] initWithTitle:#"Done" style:UIBarButtonItemStylePlain target:self action:#selector(Done)] autorelease];
and Done is
- (void) Done{
[self dismissModalViewControllerAnimated:YES];
}
SettingLandscape.m
This view stacked on when the view is rotated. This view controller has it's navigation bar.
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
self.title = #"Setting Landscape";
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
return YES;
}
in viewDidLoad;
- (void)viewDidLoad {
[super viewDidLoad];
NSLog(#"landscape:viewDidLoad");
//self.title = #"SettingLandscape";//not working!!
//self.navigationItem.leftBarButtonItem = [[[UIBarButtonItem alloc] initWithTitle:#"Done1" style:UIBarButtonItemStylePlain target:self action:#selector(Done)] autorelease];
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
stringflag4MapType = [[NSString alloc] initWithString:#"blah"];
stringflag4MapType = [defaults stringForKey:#"flag4MapType"];
if (![stringflag4MapType isEqualToString:#"Hybrid"] && ![stringflag4MapType isEqualToString:#"Standard"] && ![stringflag4MapType isEqualToString:#"Satellite"]) {
segmentedControl4MapType.selectedSegmentIndex = 0;
}else if ([self.stringflag4MapType isEqualToString:#"Standard"]) {
segmentedControl4MapType.selectedSegmentIndex = 0;
}else if ([self.stringflag4MapType isEqualToString:#"Satellite"]) {
segmentedControl4MapType.selectedSegmentIndex = 1;
}else if ([self.stringflag4MapType isEqualToString:#"Hybrid"]) {
segmentedControl4MapType.selectedSegmentIndex = 2;
}
and following call does not get invoked. strange. doesn't matter rotation works anyway.
- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration {
if (toInterfaceOrientation==UIInterfaceOrientationPortrait) {
NSLog(#"to Portrait");// does not print out.
SettingPortrait *settingportrait = [[SettingPortrait alloc] initWithNibName:#"SettingPortrait" bundle:[NSBundle mainBundle]];
self.view = settingportrait.view;
[settingportrait release];
}
if (toInterfaceOrientation==UIInterfaceOrientationPortraitUpsideDown) {
NSLog(#"to PortraitUpsideDown");
SettingPortrait *settingportrait = [[SettingPortrait alloc] initWithNibName:#"SettingPortrait" bundle:[NSBundle mainBundle]];
self.view = settingportrait.view;
[settingportrait release];
}
}
ok now, as you can see from those snap shots there are two navigation bar and each has its bar button, Done and Item. The Done button came from Setting and the Item button from SettingPortrait or SettingLandscape. All button's selector is same, that leads back to map view. The button Done works fine, but the button Item crashes. I need a button on navigation bar after rotation that acts like back button . I guess once I did 'self.view = settingportrait.view;' the problem starts.
The reason why I need the Item button work is that the segmented control started crashing once I add code to support rotation. If I found reason how to make the Item button-that is inside rotation view- work I think I can make the segmented control work as well.
You can download the whole code at https://github.com/downloads/bicbac/rotation-test/rotate-1.zip
https://github.com/downloads/bicbac/rotation-test/rotate-1.zip
this sample code is amazing for me. It solve my problem of rotating view just by simple delegate method
(BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
return YES;
}
my best attempt to answer question without looking at code (don't have time tonight :( )
When you present setting viewcontroller modally, your top viewcontroller is setting.
When rotation happens, you load setting_landscape or setting_portrait viewcontroller, but only retain the view inside setting_landscape|portrait. Thus, setting_landscape/portrait viewcontrollers are released. When device is rotated, it's probably "setting" viewcontroller receiving rotation message, not the "setting_landscape/portrait" viewcontroller because they are not pushed on to the viewcontroller stack.
So, when you click on item or segment control, it will call delegate, which is probably set to setting_landscape|portrait which is released already.
What is the message in console you get with crash?
My recommendation would be to build setting viewcontroller with segmented control, then use "willAnimateRotationToInterfaceOrientation:duration:" function to reposition the segmented control to the right position and frame. Just by returning YES to all orientation, rotation should be supported, doesn't it?
What was the reason for using two separate viewcontroller for landscape/portrait? (I do this sometimes, but rarely)
Edit* you need to use "willAnimateRotationToInterfaceOrientation" callback to animate the changes, not "willRotate..."