I can't get setViewControllers to set the view controllers for my UITabBarController.
In the implementation for my UITabBarController subclass, I have:
- (void)viewDidLoad
{
[super viewDidLoad];
self.navigationItem.title = #"Test";
self.navigationItem.backBarButtonItem.title = #"To Test";
NSMutableArray *aViewControllersArray = [[NSMutableArray alloc] initWithCapacity:2];
UINavigationController* aNavigationController;
aNavigationController = [UIViewControllerOne alloc];
[aViewControllersArray addObject:aNavigationController];
[aNavigationController release];
aNavigationController = [UIViewControllerTwo alloc];
[aViewControllersArray addObject:aNavigationController];
[aNavigationController release];
[self setViewControllers:aViewControllersArray animated:TRUE];
[aViewControllersArray release];
}
The aViewControllersArray has the two UIViewControllers, but the viewControllers property of the UITabBarController is nil.
What am I doing wrong?
Figured it out:
In creating my UITabBarController I had been doing
[MyUITabBarController alloc]
rather than
[[MyUITabBarController alloc] init]
Adding init saved the day.
Related
Im am trying to link one of my buttons from the UIAlertView that pops up so that It changes to another viewcontroller. Basically, the cancel already works, but when Next is clicked it doesnt, and i don't know how to link to another viewcontroller. Please help.
#import "ViewController.h"
#interface ViewController() <UIAlertViewDelegate>
#end
#implementation ViewController
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (IBAction)clickButton:(id)sender {
UIAlertView *alert = [[UIAlertView alloc] initWithTitle: #"Test" message: #"Message" delegate: self cancelButtonTitle:#"Cancel" otherButtonTitles:#"Redeem", nil];
[alert show];
}
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{
if(buttonIndex == 1){ //Next
UIViewController* newView = [[UIViewController alloc] init];
[self presentViewController:newView animated:YES completion:nil];
}
}
#end
It is working...Just create object of viewcontroller that you want to present instead of
UIViewController* newView = [[UIViewController alloc] init];
like
SecondViewController * newView = [[SecondViewController alloc] initWithNibName:#"SecondViewController" bundle:nil];
if you are using xib.
Or
SecondViewController * newView = [self.storyboard instantiateViewControllerWithIdentifier:#"SecondViewController"];
if you are using storyboard(if you want to go through coding).
and then write
[self presentViewController:newView animated:YES completion:nil];
line.
Here is the screen of my nib file and map view but the map is always taking the whole view.I tried resetting my simulator and cleaning my Xcode but nothing works.Am i doing something wrong?
Do i need to give mapview a frame programmatically?
http://prntscr.com/1sy1bw
I also want the button to be on top of mapview if the map cannot be set to take a particular frame.
Consider the below code please:
#import "mapViewController.h"
#interface mapViewController ()
#end
#implementation mapViewController
#synthesize mapView,source,dest,latdest,latsource,longdest,longsource;
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self)
{
dest=#"delhi";
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
mapView = [[MKMapView alloc] initWithFrame:CGRectMake(0,0,160,240)];
CLGeocoder *geocoder1 = [[CLGeocoder alloc] init];
[geocoder1 geocodeAddressString:source
completionHandler:^(NSArray* placemarks, NSError* error)
{
for (CLPlacemark* aPlacemark in placemarks)
{
coordinate.latitude = aPlacemark.location.coordinate.latitude;
latsource=&coordinate.latitude;
coordinate.longitude = aPlacemark.location.coordinate.longitude;
longsource=&coordinate.longitude;
MKPointAnnotation *annotation = [[MKPointAnnotation alloc] init];
[annotation setCoordinate:(coordinate)];
[annotation setTitle:source];
annotation.subtitle = #"I'm here!!!";
mapView.delegate = self;
[self.mapView addAnnotation:annotation];
}
}];
}
- (void)viewDidLoad
{
[super viewDidLoad];
//mapView = [[MKMapView alloc] initWithFrame:CGRectMake(0,0,160,240)];
CLGeocoder *geocoder1 = [[CLGeocoder alloc] init];
[geocoder1 geocodeAddressString:source
completionHandler:^(NSArray* placemarks, NSError* error)
{
for (CLPlacemark* aPlacemark in placemarks)
{
coordinate.latitude = aPlacemark.location.coordinate.latitude;
latsource=&coordinate.latitude;
coordinate.longitude = aPlacemark.location.coordinate.longitude;
longsource=&coordinate.longitude;
MKPointAnnotation *annotation = [[MKPointAnnotation alloc] init];
[annotation setCoordinate:(coordinate)];
[annotation setTitle:source];
annotation.subtitle = #"I'm here!!!";
[self.view addSubview:mapView];
[self.mapView addAnnotation:annotation];
}
}];
}
I commented the mapview alloc codeline and this fixed the issue.Seems like mapview gets pushed as soon as its allocated memory space.Moreover the frame coordinated that i initialised mapviewview with are still preserved although the code is commented.Dont know if it should work this way only or not but it did solved my issue .
I have a Tab View Controller as my root controller in an App which consists of 3 tabs let's call them View A, View B, View C.
I want to load these tabs as soon as my app starts, I think it can be done within didFinishLaunchingWithOptions function but I'm not exactly sure, does anyone know how to do it?
Thanks
For these kinds of purposes I used this approach:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
UIWindow *window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.window = window;
UITabBarController *tabBarController = [[UITabBarController alloc] init];
rootView = [[SGMenuViewController alloc] init];
UIViewController *tab1VC = [[UIViewController alloc] init];
UIViewController *tab2VC = [[UIViewController alloc] init];
UIViewController *tab3VC = [[UIViewController alloc] init];
UIViewController *tab4VC = [[UIViewController alloc] init];
navController = [[UINavigationController alloc] initWithRootViewController:rootView];
UINavigationController *secondNavController = [[UINavigationController alloc] initWithRootViewController:tab3VC];
NSArray* controllers = [NSArray arrayWithObjects:navController, tab2VC, secondNavController, tab4VC, nil];
tabBarController.viewControllers = controllers;
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.window.rootViewController = tabBarController;
[self.window makeKeyAndVisible];
return YES;
}
You basically create a UITabBarController and you put all your view there. You create a UINavigationController if you need to push/pop views in the selected tab. In the example above only the 1st and the 3rd tab have UINavigationController and so I can use self.navigationController pushViewController: on them.
I need to stick a toolBar with a UITextField inside to a keyboard.
What if I make the whole toolBar (which I think is the textField's super view) the inputAccessoryView of its textField?
I mean like this:
textField.inputAccessoryView = toolBar; // textField is inside the toolBar
I've been trying on this but I have not made it work yet.
Anyone can help?
Or is there another way to achieve what I want?
- (void)viewDidLoad
{
[self createAccessoryView];
[textField setDelegate:self];
[textField setKeyboardType:UIKeyboardTypeDefault];
[textField setInputAccessoryView:fieldAccessoryView];
}
- (void)createAccessoryView
{
CGRect frame = CGRectMake(0.0, self.view.bounds.size.height, self.view.bounds.size.width, 44.0);
fieldAccessoryView = [[UIToolbar alloc] initWithFrame:frame];
fieldAccessoryView.barStyle = UIBarStyleBlackOpaque;
fieldAccessoryView.tag = 200;
[fieldAccessoryView setBarStyle:UIBarStyleBlack];
UIBarButtonItem *spaceButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];
UIBarButtonItem *doneButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:#selector(done:)];
UISegmentedControl* segmentedControl = [[UISegmentedControl alloc] initWithItems:[NSArray arrayWithObjects:NSLocalizedString(#"Previous", #""), NSLocalizedString(#"Next", #""), nil]];
[segmentedControl addTarget:self action:#selector(segmentAction:) forControlEvents:UIControlEventValueChanged];
segmentedControl.segmentedControlStyle = UISegmentedControlStyleBar;
[segmentedControl setMomentary:YES];
UIBarButtonItem *segmentButton = [[UIBarButtonItem alloc] initWithCustomView:segmentedControl];
[fieldAccessoryView setItems:[NSArray arrayWithObjects:segmentButton, spaceButton, doneButton, nil] animated:NO];
[segmentButton release];
[spaceButton release];
[doneButton release];
[segmentedControl release];
}
When are you setting the property? You may be setting it after the view has already loaded.
Try setting it in
- (void) viewDidLoad
I am having trouble in making a tableview with navigation bar or controller on top.
I have this piece of code,
- (void)viewDidLoad {
[super viewDidLoad];
UINavigationController *addNavCon = [[UINavigationController alloc]initWithNibName:#"Welcome" bundle:nil];
self.navigationItem.rightBarButtonItem = self.addButtonItem;
self.navigationItem.leftBarButtonItem = self.editButtonItem;
[self createEditableCopyOfDatabaseIfNeeded];
[[NSNotificationCenter defaultCenter] addObserver:self selector:#selector(applicationWillTerminate:) name:UIApplicationWillTerminateNotification object:nil];
NSString *documentDirectory = [self applicationDocumentsDirectory];
NSString *path = [documentDirectory stringByAppendingPathComponent:#"notebook.plist"];
NSMutableArray *tmpArray = [[NSMutableArray alloc] initWithContentsOfFile:path];
self.Notes = tmpArray;
[tmpArray release];
}
However, the navigation bar never show up, while the table is doing fine. May i know what's the problem with the code?
Many thanks
You have created an instance of UINavigationController but never added it to anything. You need to add it to the current hierarchy or it will not appear.
If you wish to add the navController to the entire app, then you should do this in the App Delegate by
- (void)applicationDidFinishLaunching:(UIApplication *)application
{
UIViewController *rootController = [[MyRootViewController alloc] init];
UINavigationController *navigationController = [[UINavigationController alloc]
initWithRootViewController:rootController];
[rootController release];
window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
[window addSubview:navigationController.view];
[window makeKeyAndVisible];
}