I am trying to use an MGSplitViewController, but rather than having it set as the rootViewController, I want it to show modally. This is the code I am using so far
- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath: (NSIndexPath *)indexPath
{
if(splitViewController == nil)
{
self.splitViewController = [[MGSplitViewController alloc] init];
self.rootViewController = [[RootViewController alloc] init];
self.detailViewController = [[DetailViewController alloc] init];
}
[splitViewController setViewControllers:[NSArray arrayWithObjects:rootViewController, detailViewController, nil]];
if (NO) { // whether to allow dragging the divider to move the split.
splitViewController.splitWidth = 15.0; // make it wide enough to actually drag!
splitViewController.allowsDraggingDivider = YES;
}
splitViewController.delegate = detailViewController;
[rootViewController performSelector:#selector(selectFirstRow) withObject:nil afterDelay:0];
[detailViewController performSelector:#selector(configureView) withObject:nil afterDelay:0];
[self presentViewController:splitViewController animated:YES completion:nil];
}
This works almost fine, but the buttons in the detailViewController do not work. They do nothing. Also, when I click a button in the left panel, the text doesn't change in the detailViewController as it does in the same project.
Am I missing something?
I'm also working with MGSplitViewController, but it sounds to me like you need to set up some communication between your master and detail views. If you look at the demo project, you can see they use delegates to that effect.
Related
I'm still new to iOS development but I've ran into a problem that I can't solve and I've tried looking online but can't find anything yet.
I'm using a UIImagePickerController to pick and image and I'm using it in the App Delegate. When an image is returned, in the imagePickerController:didFinishPickingMediaWithInfo method, I want to make a new navigation controller with a view controller and put it over the "app".
Here is how I'm doing it:
CustomNavigationController *customNavigationController = [[CustomNavigationController alloc] init];
PhotoViewController *photoViewController = [[PhotoViewController alloc] initWithNibName:#"PhotoViewController" bundle:[NSBundle mainBundle]];
[customNavigationController pushViewController:photoViewController animated:NO];
[customNavigationController.view setFrame:[[UIScreen mainScreen] applicationFrame]];
[photoViewController release];
[self.window addSubview:customNavigationController.view];
//Call method of photoViewController.
[[customNavigationController.viewControllers objectAtIndex:0] addPhotoFromData:info];
[self.tabBarController dismissViewControllerAnimated:YES completion:nil]; //Get rid of UIImagePickerController
However in the photoViewController, I don't have access to any instance variables synthesized and loaded in viewDidLoad. They all return to null. There is also a tableView and calls to reload the tableView do not actually cause the tableView to respond.
Here is some of the code from photoViewController
- (void)viewDidLoad
{
[super viewDidLoad];
self.photoCount = 0;
self.timestamp = [[NSDate date] timeIntervalSince1970];
self.photos = [[NSMutableArray alloc] initWithCapacity:5];
self.photosData = [[NSMutableArray alloc] initWithCapacity:5];
self.uploadingCount = 0;
UINib *customCell = [UINib nibWithNibName:#"CustomTableCell" bundle:[NSBundle mainBundle]];
[self.tableView registerNib:customCell forCellReuseIdentifier:#"customCell"];
self.tableView.separatorColor = [UIColor clearColor];
NSLog(#"%#", self);
}
and also the addPhotoFromData method:
- (void)addPhotoFromData:(NSDictionary *)info
{
[self.photos addObject:info];
NSLog(#"%#", self.photos); //Doesn't add "info" and does not return anything when later called from other methods.
[self.tableView reloadData]; //Doesn't work
Everything was working before I add in the UINavigationController. I'm completely lost.
EDIT: After some more debugging attempts, I have discovered that the view is not loaded when addPhotoFromData is called. viewDidLoad is called afterwords. Is there a way to delay method calls?
Any reason you can't have the PhotoViewController call addPhotoFromData: inside the viewDidLoad method? You can always access properties of the app delegate from the view controller:
YourAppDelegateType * delegate = [UIApplication sharedApplication].delegate;
[self addPhotoFromData:delegate.info];
I have a uitableView with different sections and rows that I created them programmatically
when I cleck on one row I will go to the new views and in new views in navigation bar I have canel button
with cancel button it should work like a back button but when I click on cancel it load the table but change the table style from group to plain
Thanks in Advance!
does any one know why?
would you please help me
I want to know why it changes.
what should I add to have the same stype
here is my code:
in first table, I added the style both programmatically and via storyboard
- (id)initWithStyle:(UITableViewStyle)style
{
style = UITableViewStyleGrouped;
self = [super init];
if (self) {
self = [super initWithStyle:style];
monthTitle = [[NSMutableArray alloc] init];
}
return self;
}
button code
-(void)cancelItem{
Report *report = [[Report alloc] initWithNibName:nil bundle:nil];
[self presentModalViewController:report animated:YES];
[self.tableView reloadData];
}
Edit
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
_selectedIndex = indexPath.section;
[self.tableView reloadData];
switch (indexPath.section){
case 0:
[self performSegueWithIdentifier:#"WorkTime" sender:self];
We can set the style as
[[UITableViewController alloc] initWithStyle:UITableViewStyleGrouped];
So, another EXC_BAD_ACCESS topic on StackOverflow, but as I'm new to Objective-C this is still a topic I don't really grasp yet. Even though I have done a lot of research about it already.
The issue is the following. I have a UIScrollView that I have overwritten using a Custom Class (named MultiSelectView). If the user taps this UIScrollView and then I want to open a view that allows him to select some data.
So I have declared a UITapGestureRecognizer that calls the openMultiSelect: method. But on the line [parent.navigationController pushViewController:view animated:YES]; I get a Program received signal: "EXC_BAD_ACCESS". error. Why o why?
- (id) initWithCoder:(NSCoder *) coder {
self = [super initWithCoder: coder];
if (self) {
// Add a Tap Gesture Recognizer to the Scrollview.
// If the user taps the view, it triggers the 'openMultiSelect' method.
UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(openMultiSelect:)];
[singleTap setNumberOfTapsRequired:1];
[singleTap setNumberOfTouchesRequired:1];
[self addGestureRecognizer:singleTap];
}
return self;
}
- (void)openMultiSelect:(UIGestureRecognizer *)gesture {
//int myViewTag = gesture.view.tag; // now you know which view called
DataSelectView *view = [[DataSelectView alloc] initWithNibName:#"DataSelectView" bundle:[NSBundle mainBundle]];
view.allowMultiSelect = YES;
[parent.navigationController pushViewController:view animated:YES];
[view release];
}
So the parent that you see is a ViewController that contains the tab. Is there a better way to do this? Because for now I have thus a ViewController that contains Tabs. In its activateTab: method I thus create the tab and pass self along. I do the same in the viewDidLoad for that tab to pass the parent to the custom UIScrollView:
- (void) activateTab:(int)index {
... code ...
self.tab_Basic = [[TabBasic alloc] initWithNibName:#"TabBasic" bundle: [NSBundle mainBundle]];
self.tab_Basic.parent = self;
... code ...
}
You should make some change to your callback method. Something like that:
- (void)openMultiSelect:(UIGestureRecognizer *)gesture {
//int myViewTag = gesture.view.tag; // now you know which view called
if(gesture.state == UIGestureRecognizerStateEnded){
DataSelectView *view = [[DataSelectView alloc] initWithNibName:#"DataSelectView" bundle:[NSBundle mainBundle]];
view.allowMultiSelect = YES;
[parent.navigationController pushViewController:view animated:YES];
[view release];
}
}
What you are doing wrong is releasing the object "view" too early, don't release it until the view is popped. That should fix the problem.
- (void)openMultiSelect:(UIGestureRecognizer *)gesture {
//int myViewTag = gesture.view.tag; // now you know which view called
DataSelectView *view = [[DataSelectView alloc] initWithNibName:#"DataSelectView" bundle:[NSBundle mainBundle]];
view.allowMultiSelect = YES;
[parent.navigationController pushViewController:view animated:YES];
I have a custom object, Spaces:
#import "Spaces.h"
#implementation Spaces
#synthesize spaceName;
#synthesize spaceUsers;
#synthesize spaceIcon;
#synthesize spaceID;
#synthesize imageURLString;
- (void)dealloc
{
[spaceName release];
[spaceUsers release];
[spaceIcon release];
[imageURLString release];
[super dealloc];
}
#end
My root view controller implements a cellForRowAtIndexPath: and grabs from an NSArray of Spaces:
[[cell spaceName] setText:aSpace.spaceName];
[[cell spaceChatType] setText:#"People"];
[[cell spaceActiveUsers] setText:aSpace.spaceUsers];
This works fine and I can click to go into the detail view and back to the list, but after maybe 5-6 clicks back and forth between the table view and detail view, I get an error at [[cell spaceName] setText:aSpace.spaceName]; which is
'-[__NSCFSet spaceName]: unrecognized selector sent to instance 0x6047b90'"
Please help! Any insight will be very appreciated!
UPDATE:
I'm still getting the same error but I've narrowed it down to the this:
-I'm creating a detail view controller on didSelectRowAtIndexPath...
-The detail view is being pushed to the viewcontroller and displays fine, I have a back button added as well.
-The detail view loads information and refreshes on a timer
-Pressing the back button goes back to the table list view
This is the problem my detail view is not being released from memory so the more I go back and forth between the views the more timers were going off simultaneously. I added a check to viewWillDisappear that stops the timer by setting a bool value.
I noticed that the detail view is not unloading...
From the RootViewController:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
//no longer on initial view
isinit = NO;
//hide keyboard
[spacesSearch resignFirstResponder];
if (spaces != nil && spaces.count > 0)
{
//set back button reference
UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithTitle:#"Spaces" style:UIBarButtonItemStylePlain target:self action:#selector(returnSpacesList:)];
self.navigationItem.backBarButtonItem = backButton;
[backButton release];
DetailViewController *details = [[DetailViewController alloc] initWithNibName:#"DetailViewController" bundle:nil];
//Grab Data from selected Space object and pass to DetailViewController
Spaces *aSpace = nil;
if (tableView == self.searchDisplayController.searchResultsTableView)
{
if ([self.filteredListContent count] == 0)
{
//self.lastSearchText
NSLog(#"Create new space code!");
}
else
{
aSpace = [self.filteredListContent objectAtIndex:indexPath.row];
}
}
else
{
aSpace = [spaces objectAtIndex:[indexPath row]];
}
//set title and display
self.navigationController.title = [NSString stringWithFormat:#"/%#/",aSpace.spaceName];
//pass data
[details passedValue:aSpace.spaceID :aSpace.spaceName];
[self.navigationController pushViewController:details animated:YES];
[aSpace release];
[details release];
}
}
How can I force the detail view to be released from memory?
Thank you
It sounds like [cell spaceName] has been autoReleased. I cannot see how you have defined that, but take a look at that part of your code.
If you need more help, you need to provide more code.
Perhaps your aSpace = [spaces objectAtIndex:[indexPath row]];
is not returning a Space object. Perhaps before you try and use it you test to make sure with something like if ([aSpace class] == [Spaces class])
I have a problem that I had working in a test but now in a bigger application I can't seem to sort out.
First of I have a view that has six button each loads a different view I am using:
- (IBAction)showInfo2:(id)sender {
InfoViewController *Infocontroller = [[[InfoViewController alloc] initWithNibName:#"InfoView" bundle:nil] autorelease];
Infocontroller.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;
[self presentModalViewController:Infocontroller animated:YES];
}
This seems to be working fine, and loads the next section, in this case 'infoview'.
I then load a tableview and fill it full f data from an xml feed, this again is now working, (although was not an easy task for me!).
The problem comes when I know try and use:
Nothing seems to happen, ie, the new view is not loaded.
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
// Navigation logic may go here -- for example, create and push another view controller.
SubInfoViewController *subInfoViewController = [[SubInfoViewController alloc] initWithNibName:#"SubInfoView" bundle:nil];
[self.navigationController pushViewController:subInfoViewController animated:YES];
[subInfoViewController release];
}
I know its being called because this works:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
NSString *message = [[NSString alloc] initWithFormat:#"You selected a row"];
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"Row Selected" message:message delegate:nil cancelButtonTitle:#"Yes I did" otherButtonTitles:nil];
[alert show];
[message release];
[alert release];
}
Any help more than welcome, and please be gentle newbie :)
You're view is probably push into navigation stack but you can't see it because your parent view is modal.
You can't try to display your SubInfoViewController like this :
SubInfoViewController *subcontroller=[[SubInfoViewController alloc] initWithNibName:#"SubInfoViewController" withBundle:nil];
[self presentModalViewController:subcontroller animated:YES];
[subcontroller release];
If you want to keep a navigation logic in your app, you should not display your InfoViewController modally but present it in a common way in your navigation stack.
You can try to dismiss your modal view before pushing your SubViewController. In this case you must do something like this :
SubInfoViewController *controller=[[SubInfoViewController alloc] initWithNibName:#"SubInfoViewController" bundle:nil];
[self.parentViewController pushViewController:controller animated:YES];
[self dismissModalViewControllerAnimated:YES];
[controller release];
You'll receive a warning because parentViewController may not respond to pushViewController: animated: but with a NSLog you'll see that your parentViewController is actually a UINavigationController.
Hope this helps !
What exactly is the problem? Your code looks fine at first glance.