I am now trying to develop a chat function like the native one in the iPhone SMS-app. I have followed this guide: https://github.com/HansPinckaers/GrowingTextView how to create a TextView that scale's height depending on the amount of text in it.
Ofcourse I want to integrate this with my existing UIViewController built in storyboard (which is a tableView) instead of customizing a new one by code like being done in this tutorial: https://github.com/HansPinckaers/GrowingTextView/blob/master/example/Classes/GrowingTextViewExampleViewController.m
- (void)loadView {
self.view = [[UIView alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame]];
self.view.backgroundColor = [UIColor colorWithRed:219.0f/255.0f green:226.0f/255.0f blue:237.0f/255.0f alpha:1];
.......................................... etc
[self.view addSubview:containerView];
...........................................etc
}
Now, if I wanna replace self.view = [[UIView alloc] code above to be self.view = my viewController from storyboard what shall I type instead? I tried to remove the code instead:
//self.view = [[UIView alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame]];
But I am getting bad access error when trying to add subview code [self.view addSubview:containerView]; to the UIViewController in storyboard since self.view should refer to the storyboard if not being set to something else? It worked when it was set to the customized UIView code:
self.view = [[UIView alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame]];
self.view.backgroundColor = [UIColor colorWithRed:219.0f/255.0f green:226.0f/255.0f blue:237.0f/255.0f alpha:1];
So...To sum this up, how do I add the subView (containerView) to my existent UIViewController in storyBoard ? Here is also a pic of my bad access error: http://tinypic.com/view.php?pic=21acqvb&s=6
Related
I'm building view without .xib file, just using loadView method. But in the point, when loadView is called, the frame of view is yet unknown. So, I use it just to build view hierarchy without concrete frames. (Than I update view's layout when it's frame is known.)
The question is: should I use [[UIView alloc] init] or [[UIView alloc] initWithFrame:CGRectZero] or may be something else, to initialize view without known frame?
Here is the code:
- (void)loadView
{
UIView *containerView = [[UIView alloc] init];
// or
// UIView *containerView = [[UIView alloc] initWithFrame:CGRectZero];
// or something else?
// ...
self.view = containerView;
[containerView release];
}
- (id)initWithFrame: is the designated initializer for UIView, so you should use that, with a zero-sized rect.
I have created a UIScrollView and am now trying to place a UIButton over the scroll view. However when I build and run the application the scroll view still works fine but I cannot see the UIButton.
I link the UIButton IBOutlet inside the interface builder.
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
scrollView = [[UIScrollView alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame]];
scrollView.backgroundColor = [UIColor blackColor];
scrollView.delegate = self;
scrollView.bounces = NO;
backgroundImage = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"auckland-300.jpg"]];
image = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"249a-134206f1d00-1342071f5d9.ImgPlayerAUCKLAND.png"]];
// Note here you should size the container view appropriately and layout backgroundImage and image accordingly.
containerView = [[UIView alloc] initWithFrame:CGRectMake(0,0,601,601)];
playButton = [[UIButton alloc] init]; //test button cannot see it.
[containerView addSubview:backgroundImage];
[containerView addSubview:image];
scrollView.contentSize = containerView.frame.size;
[scrollView addSubview:containerView];
scrollView.minimumZoomScale = 0.5;
scrollView.maximumZoomScale = 31.0;
[scrollView setZoomScale:scrollView.minimumZoomScale];
self.view = scrollView;
}
Any help would be appreciated
Everything seems ok. But I think the reason you are not able to see the button playButton is because you are not adding it to the view itself.
Dont you need to do this ? [containerView addSubview:playButton];
To help you out, here's what I do for debugging -
UIView implements a useful description method. In addition, it
implements a recursiveDescription method that you can call to get a
summary of an entire view hierarchy.
NSLog(#"%#", [controller.view recursiveDescription]);
The button is probably in the nib that you linked the controllers view to, right? By assigning the scrollview to the view, you remove the view from
The nib from the controller, that's why you can't see te button or press it.
You can either place the button in the scrollview or you add both scrollView and thenthe playButton as subviews of self.view.
Maybe you want to rethink your design tho.
Placing a button over a scrollview doesn't really seem like good practice to me.
This is what I tried. Nothing appears on the screen and none of the UITableView methods that you are supposed to implement are getting called.
-(void)loadView
{
UIView *view = [[UIView alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame]];
self.view = view;
[view release];
}
- (void)viewDidLoad
{
[super viewDidLoad];
UITableViewController *TVC = [[[UITableViewController alloc]
initWithStyle:UITableViewStylePlain] autorelease];
CGRect cgRct = CGRectMake(0, 10, 320, 100);
UIView *newView = [[UIView alloc] initWithFrame:cgRct];
TVC.view = newView;
[newView release];
[self.view addSubview:TVC.view];
}
I've looked for good examples and tutorials on doing this programmatically but there are none.
What I am trying to achieve is a Table that doenst take up my who screen. Maybe 3/4 of my screen would be good.
Many Thanks
Code
The problem is that you're creating a UITableViewController, which is a UIViewController, and will expect to be on the nav stack. What you want to do is create a UITableView, which is a UIView. You are also not setting the table's delegate and data source, which you will need to do to get calbacks.
Your viewDidLoad should look something like this
- (void)viewDidLoad
{
[super viewDidLoad];
UITableView *table = [[[UITableView alloc] initWithStyle:UITableViewStylePlain] autorelease];
table.dataSource = self;
table.delegate = self;
table.frame = CGRectMake(0, 10, 320, 100);
[self.view addSubview:table];
}
(Note that if you're going to need access to the table outside of the callbacks, you should save it in an ivar rather than declaring it locally, and should retain it. Let me know if you need a few more lines of code to show you what I mean)
Make sure you set the delegate of TVC, with
TVC.delegate = self;
That's the reason why none of those methods are getting called. Also, make sure your class implements the UITableViewDelegate protocol by changing your interface declaration to
#interface YourViewController : UIViewController <UITableViewDelegate> {
//declare variables here
}
Also, equally important, don't set TVC.view, as this already happens when you initialize the view controller. You're just setting it to a blank view, which is why you're not seeing anything.
iOS7 seems to like this way of init'ing the tableview:
//make tableview
UITableView *table = [[UITableView alloc] initWithFrame:CGRectMake(0, 81, 200, 200) style:UITableViewStylePlain];
table.dataSource = self;
table.delegate = self;
[self.dataView addSubview:table];
try that out. Hope it helps someone.
UIView *newView = [[UIView alloc] initWithFrame:cgRct];
TVC.view = newView;
I'll give you a hint. Here you are setting the view of the UITableViewController to an EMPTY VIEW...
I've been trying out some of the view code from Erica Sadun's book "The iPhone Developer's Cookbook" and found some code I don't understand. Here's the code for a loadView method:
- (void)loadView
{
// Create the main view
UIView *contentView = [[UIView alloc] initWithFrame:
[[UIScreen mainScreen] applicationFrame]];
contentView.backgroundColor = [UIColor whiteColor];
self.view = contentView;
[contentView release];
// Get the view bounds as our starting point
CGRect apprect = [contentView bounds];
// Add each inset subview
UIView *subview = [[UIView alloc]
initWithFrame:CGRectInset(apprect, 32.0f, 32.0f)];
subview.backgroundColor = [UIColor lightGrayColor];
[contentView addSubview:subview];
[subview release];
}
My question is why does she release contentView, but then use it again in [contentView addSubview:subview]? Has self.view = contentView retained contentView?
If you look in the documentation for UIViewController, you'll see that the view property is declared as:
#property(nonatomic, retain) UIView *view;
This means that when you use the setView: method (or use .view on the left hand side of the =), then whatever value you pass in will be retained. So, if you go through the code and look at retain counts, you'll get this:
- (void)loadView {
// Create the main view
UIView *contentView = [[UIView alloc] initWithFrame:
[[UIScreen mainScreen] applicationFrame]]; //retain count +1
contentView.backgroundColor = [UIColor whiteColor]; //retain count +1
self.view = contentView; //retain count +2
[contentView release]; //retain count +1
// Get the view bounds as our starting point
CGRect apprect = [contentView bounds];
// Add each inset subview
UIView *subview = [[UIView alloc]
initWithFrame:CGRectInset(apprect, 32.0f, 32.0f)];
subview.backgroundColor = [UIColor lightGrayColor];
[contentView addSubview:subview];
[subview release];
}
I'd say that the really interesting thing is that after releasing contentView, we can still send messages to it, because the object living at the end of contentView's pointer still exists (since it was retained by calling setView:).
If u declare ur property like so
#property(nonatomic,retain) ...
TheN yes the property is retained when assigned. that is probably what's going on
I'm building a UITableView programmatically without NIB files here. I'm doing something silly however, as my navigationBar shows up fine, as does my UITableView. However, the UITableView is not properly fitting onto the screen. You'll see roughly 20 pixels separating the UINavigationBar and the UITableView. I set my window's backgroundColor to black, as you can see in this screen shot:
Here's the code to reproduce the problem:
- (void)loadView
{
[super loadView];
// TableViews that wish to utilize tableView footers/headers should override this method.
UITableView *aTableView = [[UITableView alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame] style:UITableViewStylePlain];
aTableView.autoresizingMask = (UIViewAutoresizingFlexibleWidth|UIViewAutoresizingFlexibleHeight);
aTableView.separatorStyle = UITableViewCellSeparatorStyleSingleLine;
aTableView.delegate = self;
aTableView.dataSource = dataSource;
self.tableView = aTableView;
[self.view addSubview:self.tableView];
[aTableView release];
// style navigation bar.
//self.navigationController.navigationBar.barStyle = UIBarStyleBlackOpaque;
}
use bounds instead of applicationFrame