I use original method XML data can show in rootviewcontroller TableView. When i use New Procedure it show the table only no data. How can i show the data in New Method?
Original Method
appDelegate.m (setup XML & load the data)
rootviewController.m (use nsarray & load the data into table view)
New Method
appDelegate.m (setup XML & load the data)
mainviewController.m (Setup up UIVEW & button key), (when button press, go to rootviewcontroller.m)
rootviewController.m (use nsarray & load the data into table view)
appDeleagte.m
- (void)addbookToList:(NSArray *)books {
[self.rootViewController insertBooks:books];
mainviewcontroller.h
#import <UIKit/UIKit.h>
#class RootViewController;
#interface MainViewController : UIViewController {
IBOutlet RootViewController *rvController;
}
- (IBAction) startButton;
#end
mainviewcontroller.m
-(IBAction)startPage {
rvController = [[RootViewController alloc] initWithNibName:#"RootView" bundle:[NSBundle mainBundle]];
[self.navigationController pushViewController:rvController animated:YES];
rootviewcontroller.m
- (void)viewDidLoad {
[super viewDidLoad];
self.bookList = [NSMutableArray array];
self.tableView.rowHeight = 60.0;
[self addObserver:self forKeyPath:#"bookList" options:0 context:NULL];
}
If you call addBookToList: in your app delegate at a time that the root view controller doesn't yet exist, nothing will happen (sending message to nil). Store the books array, and pass it to your root view controller after you've created it, but before you push it onto the stack in your navigation controller.
Related
May somebody let me know:
How to navigate from one view to another view in single viewcontroller in iphone sdk? I have an application in which i want to push to next view and pop to previous view in a single View controller. How this functionality can be achieved?
Thanks in advance
You can add and remove your secondview.Like this to navigate
-(IBAction)navigate:(id)sender
{
[self.view addSubView:secondView];
}
and this one to po to first view
-(IBAction)popToFirstView:(id)sender
{
[secondView removeFromSuperView];
}
Note:- You can use animations for adding and removing view, if you want to give animated effects.
If you need a single view controller you can try using a UIScrollView, that contain the 2 view, and a button to scroll from a view to another... but if i can give a tip, it's better using 2 view controller and a navigation view controller
You need to use UINavigation Controller to get push and pop.
do this way
In AppDelegate.h file
#import <UIKit/UIKit.h>
#interface AppDelegate : UIResponder <UIApplicationDelegate>
#property (strong, nonatomic) UIWindow *window;
//this will be your first screen
#property (strong, nonatomic) FavViewController *favViewController;
#end
In A*ppDelegate.m* file
#import "AppDelegate.h"
#import "FavViewController.h"
#implementation AppDelegate
#synthesize window = _window;
#synthesize favViewController;
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
//initialize view controller
favViewController = [[FavViewController alloc] initWithNibName:#"FavViewController" bundle:nil];
//add navigation controller
UINavigationController *favouriteView = [[UINavigationController alloc] initWithRootViewController:favViewController];
//add controller to witndow
self.window.rootViewController = favouriteView;
[self.window makeKeyAndVisible];
return YES;
}
#end
Now come to the UIViewController, where you want to load/push to new controller
to load/push to new controller use this code
//this will be next screen
DetailsViewController *detailsViewController = [[DetailsViewController alloc ]init];
[self.navigationController pushViewController:detailsViewController animated:YES];
to go back or pop controller use this
//now it will send back to parent screen
[self.navigationController popViewControllerAnimated:YES];
I have figured out the solution for this problem and here is the solution as below:-
#import <UIKit/UIKit.h>
#interface ViewController : UIViewController
{
IBOutlet UIButton *backbtn;
IBOutlet UIButton *nxtBtn;
IBOutlet UILabel *label;
}
-(IBAction)nxt:(id)sender;
-(IBAction)ba:(id)sender;
#end
#import "ViewController.h"
#interface ViewController ()
#end
int count=0;
#implementation ViewController
- (void)viewDidLoad
{
label.text=[[NSUserDefaults standardUserDefaults] objectForKey:#"NavigtionNumber"];
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}
- (void)viewDidUnload
{
[super viewDidUnload];
// Release any retained subviews of the main view.
}
-(IBAction)nxt:(id)sender
{
count++;
label.text=[NSString stringWithFormat:#" navigation time %d",count];
[[NSUserDefaults standardUserDefaults] setObject:label.text forKey:#"NavigtionNumber"];
[[NSUserDefaults standardUserDefaults] synchronize];
ViewController *vc=[[ViewController alloc] init];
[self.navigationController pushViewController:vc animated:YES];
}
-(IBAction)ba:(id)sender
{
count--;
label.text=[NSString stringWithFormat:#" navigation time %d",count];
[[NSUserDefaults standardUserDefaults] setObject:label.text forKey:#"NavigtionNumber"];
[[NSUserDefaults standardUserDefaults] synchronize];
[self.navigationController popViewControllerAnimated:YES];
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
}
#end
Hope this will help others in future.
Thanks.
I have a view whose controller is being instantiated (NSLog says so), but the view doesn't show up. If I load it as a modal view it appears, but not if I allocate it.
I have this structure (MenuView is the view that doesn't appear):
// ViewController.h
#import "MenuViewController.h"
#class MenuViewController;
#interface ViewController : UIViewController<ASIHTTPRequestDelegate>{
...
IBOutlet MenuViewController *menuView;
}
...
#property(nonatomic, retain) MenuViewController *menuView;
#end
// ViewController.m
#import "MenuViewController.h"
#implementation ViewController
#synthesize menuView;
- (void)loadMenu{
// THIS WORKS
// [self presentModalViewController:menuView animated:YES];
// THIS DOESN'T (VIEWCONTROLLER IS INSTANTIATED BUT VIEW DOESN'T APPEAR
menuView = [[[MenuViewController alloc] initWithNibName:#"MenuView" bundle:Nil] autorelease];
[self.navigationController pushViewController:menuView animated:YES];
}
Some ideas:
Try using self.menuView when assigning:
self.menuView = [[MenuViewController alloc] initWithNibName:#"MenuView" bundle:Nil];
Also, probably shouldn't autorelease a property. Release it in dealloc and set it to nil in viewDidUnload.
Make sure that self (ViewController) has a navigationController. Was ViewController pushed/presented by a navigationController?
Is - (void)loadMenu{ being called from the MainThread? Check with [NSThread mainThread]
Check out some tutorials/examples:
Adding a Navigation Controller by Hand
NavigationController Application in iPhone
Tutorial: Introducing UINavigationController Part 1
iPhone View Switching Tutorial
I have created a navigation-based application. In that, I have created MyTableViewController using uiviewcontroller.class.
#import "RootViewController.h"
#import "MyTableViewController.h"
#implementation RootViewController
- (void)viewDidLoad
{
[super viewDidLoad];
MyTableViewController *tableViewController = [[MyTableViewController alloc] init];
}
#end
#import "MyTableViewController.h"
#implementation MyTableViewController
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad {
[super viewDidLoad];
NSLog(#"sedfsdsd");
}
#end
I don't want to show the view when the instance is created. I want to call the constructor method. I don't know how to do it. Please help me out.
#Caroline have described very good.
A normal method of your class could serve your purpose and you can name that something ViewContruction and define it in your MyTableViewController class.
-(void) ViewContruction
{
//Create all your views here
//Add that to the self.view of your controller
}
Call the above function explicitly on the instance of your view controller.
Just creating a UIViewController instance does not load the view.
If you have something like [self.view addSubview:tableViewController.view] then when that statement is executed, viewDidLoad will get executed.
However, if it's a navigation-based app, then you will need to push the viewcontroller to see it, rather than adding the subview as above.
For example:
Settings *settingsController = [[Settings alloc] initWithNibName:#"Settings" bundle:nil];
settingsController.contentSizeForViewInPopover = settingsController.view.frame.size;
[self.navigationController pushViewController:settingsController animated:YES];
[settingsController release];
I have a small doubt. I have a NSObject class where I am trying to display an alert view. So after the alert view is displayed when I tap on OK button I want to push a navigation controller onto the stack. Can I push a navigation controller from general NSObject class? Please let me know guys..thanks for your time..
This is the code..
- (void) alertView:(UIAlertView *)alert clickedButtonAtIndex:(NSInteger)buttonIndex{
SettingsViewController *homeView = [[SettingsViewController alloc] initWithNibName:#"SettingsViewController" bundle:nil];
[self.navigationController pushViewController:homeView animated:NO];
[homeView release];
}
I am creating a property called navigationController of type UINavigationController and when I catch the error I am displaying an alert view and I am using above method to push the view controller but it doesn't work..
Yes and no... depending on how you have your application set up. To push views onto the navigation stack you need to have a navigation controller.
Does your NSObject have access to this navigation controller - you might have to set up a delegate method that gets called from your delegate view when the alert view delegate gets called in your NSObject.
I'm just wondering why you're displaying a UIAlertView in an NSObject, why aren't you displaying it in a UIView or a UIViewController?
CustomObject.h
#protocol CustomObjectDelegate<NSObject>
#optional
- (void)customObjectAlertViewDidClickOk;
#end
#interface CustomObject : NSObject <UIAlertViewDelegate>{
id<CustomObjectDelegate> delegate;
}
#property (nonatomic, assign) id<CustomObjectDelegate> delegate;
#end;
CustomObject.m
#synthesize delegate;
// then put this:
- (void)alertView:(UIAlertView *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex {
[delegate customObjectAlertViewDidClickOk];
}
Then your ViewController .h file needs to include the custom object and assign the delegate methods:
#include "CustomObject.h"
#interface MyViewController : UIViewController <CustomObjectDelegate> {
}
#end
and the .m viewDidLoad (or similar):
- (void)viewDidLoad{
CustomObject *obj = [[CustomObject alloc] init];
[obj setDelegate:self];
}
- (void)customObjectAlertViewDidClickOk{
AnotherViewController *page = [[AnotherViewController alloc] initWithNibName:nil bundles:nil];
[self.navigationController pushViewController:page];
}
Thats how I would do it - given I'm not too sure i understand quite what you're asking. :) thats all off the top of my head as well - so don't take it letter for letter, but you have the basis there to start off with. You can build on it. Look up #protocols and delegate methods, its all in there. :)
I have an app with tabbar and webview. I'm trying to make the app come back to default url each time user taps the bar. Right now I'm intercepting taps and launching a method, however it's not affecting my webview (it's not loading the page). The method works properly when called from the class, but not when it's called from my app delegate, where I'm intercepting taps.
I suspect it's something with the way I create the SecondViewController object that it's not pointing to the webview, but I have no clue what I'm doing wrong.
Here is the code:
Second view header (where the WebView is located)
#interface SecondViewController : UIViewController {
IBOutlet UIWebView *secondView;
}
- (void) goToPage;
Second view implementation
#import "SecondViewController.h"
#implementation SecondViewController
- (void)awakeFromNib
{
[self goToPage];
}
- (void) goToPage
{
NSLog(#"go to page");
NSString *newURL = [NSString stringWithFormat:#"http://pageurl"];
[secondView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:newURL]]];
}
My app delegate, where I call the SecondViewController class method:
#import "RedDragonAppDelegate.h"
#import "SecondViewController.h"
#implementation RedDragonAppDelegate
#synthesize window;
#synthesize rootController;
- (void)applicationDidFinishLaunching:(UIApplication *)application {
// Override point for customization after application launch
[window addSubview:rootController.view];
}
- (void)tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController {
NSLog(#"didSelectViewController %d", rootController.selectedIndex);
SecondViewController * sv = [[SecondViewController alloc] init];
if (rootController.selectedIndex == 0){
//NSLog(#"if in didSelectViewController 0");
} else if (rootController.selectedIndex == 1) {
//NSLog(#"if in didSelectViewController 1");
[sv goToPage];
}
}
Thanks fot your help!
If I understand correctly, you've got an instance of SecondViewController with secondView connected to an instance of UIWebView in Interface Builder. What you want to do is call goToPage on that instance of SecondViewController from RedDragonAppDelegate. (In particular, note that I'm talking about instances of these--I believe this is the underlying issue.)
In tabBarController:didSelectViewController:, when you do SecondViewController * sv = [[SecondViewController alloc] init];, you are creating a new instance of SecondViewController and you can call its goToPage method, but sv is not the same instance of SecondViewController that appears in Interface Builder and has secondView connected to the UIWebView (that is, when you create a new instance of SecondViewController, the ivar secondView is unset and seems to be nil, but I don't know that it's guaranteed to be nil).
What you probably(*) want to do is add IBOutlet SecondViewController *sv; to the #interface of RedDragonAppDelegate, make sure that you have an instance of RedDragonAppDelegate in Interface Builder, connect the new IBOutlet sv of RedDragonAppDelegate to the instance of SecondViewController in Interface Builder, and delete the line in tabBarController:didSelectViewController: that defines and initializes sv.
(*) I'm not 100% certain on this because I don't do iPhone stuff and I don't know how your various views/objects/etc. are arranged in XIB/NIB files, but if everything's in one XIB/NIB file, I'm pretty sure it'll work.