I'm building an iPhone app in which I should create a new view based upon some data... so how can I programmatically create a new view with buttons, labels and pictures dynamically? Has somebody an example?
Read
Create UIButton Programmatically
Creating programmatically a label (UILabel)
And Create then in the View. Here is a very good tutorial on how to do that !
Good Luck !
First rightclick on your Xcode project (in ios 5) and select "New file">select cocoa touch>objective c class>subclass of uiview>and name your file name. THen add the following code in the .m file.
// Implement loadView to create a view hierarchy programatically, without using a nib.
-(void)loadView {
UIView *view = [[UIView alloc] initWithFrame:[UIScreen mainScreen].applicationFrame];
[view setAutoresizingMask:UIViewAutoresizingFlexibleHeig ht|UIViewAutoresizingFlexibleWidth];
[view setBackgroundColor:[UIColor blueColor]];
self.view = view;
[view release];
}
Then create the buttons as described in below posts.
Related
I build an UIViewController, that higher than iPhone screen ( the height is 900px ), i build it using UIScrollView.
In the Interface Builder, how to put an View in the bottom part of the UIScrollview ? i've tried using freeform in the inspector -> Simulated Metrics, but every time i move back to the ipad/iphone screensize, the views are mess. And when i ran it in the simulator, the view still a mess
I'd add a view programmatically and make it subview for the scrollview, i don't know how to do it using IB.
If you want to try programmatically can try something like:
UIView*myView=[[UIView alloc ] initWithFrame:CGRectMake(0, 480, 320, 200)];
[myView setBackgroundColor:[UIColor redColor]]; // Just for testing purpose
[scrollView addSubview:myView];
You have to do a bit of it programatically I'm afraid but you can do most of it in a xib.
Your xib would contain a UIView that's your normal view, containing your scrollview.
It would also contain another UIView; this will be as long as you want and will be your scrollview's contents.
In your .h file, have a property like this and attach it to the second UIView in your xib
#property (nonatomic, retain) IBOutlet UIView *scrollingContents;
and in your viewDidLoad, that's where you attach the contents inside the scroll view
- (void)viewDidLoad {
[super viewDidLoad];
[self.scrollView addSubview:scrollingContents];
self.scrollView.contentSize = scrollingContents.bounds.size;
}
I have created a main page (myAppViewController) and a add page rect button I have also created a page template (TemplateAViewController) all set up in Interface builder.
I would like users to be able to add as many templates themselves and then page through them.
I am not sure where to start. I can create views programmatic like so
-(IBAction)createnewpage : (id) sender {
myAppViewController *viewcontroller = [[myAppViewController alloc] initWithNibName:#"TemplateAViewController" bundle:[NSBundle mainBundle]];
[[self view] addSubview:viewcontroller.view];
}
I then want to be able to navigate through these views- I guess I need to create a navigation controller to do this ?
Btw this is for iPad ONLY
By navigation if you mean access the views programmatically, just do :
for (UIView *view in [self view].subviews) {
...
}
Edit:
Looking at your code, it seems that you were adding all views as subviews to a view of a fixed UIViewController [[self view] addSubview:customView]
Based on that, you can access each subview of your view controller from the mentioned for loop.
I hope I am clear now
I've always used IB but am trying to do everything through code and I'm failing at this task.
I have a ViewController to handle User Inputs and 2 UIViews which will both be visible at the same time(each in a separate header/implementation UIView file):
1 UIView represents a custom tab bar that changes (bottom 50 px)
1 UIView represents the displayed interface (everything above the tab bar)
Each needs to exist within its own frame, initialized from the ViewController so it can control them and what they display.
Bra, UIViewControllers have only one UIView as part of their guts.
That is, "view" ... i.e. ... the actual property view, as in self.view = something or view.hidden = YES.
However you can, of course, add as many subviews as you like to that view.
This is how views are used normally. Almost every .view has subviews inside it.
UIView *bottomThing = [[UIView alloc] init];
bottomThing.frame = CGRectMake whatever
UIView *otherThing = [[UIView alloc] init];
otherThing.frame = CGRectMake whatever
[view addSubview:bottomThing];
[view addSubview:otherThing];
In the example, we added two subviews to our main "built-in" view, which you refer to as simply "view". So we added bottomView to our "view" and we added topView to our "view."
The subviews you add could be either plain old UIView, or, your own special subclass of UIView.
MySpecialView *bottomThing = [[UIView alloc] init];
bottomThing.frame = CGRectMake whatever
ExtraordinaryView *otherThing = [[UIView alloc] init];
otherThing.frame = CGRectMake whatever
[view addSubview:bottomThing];
[view addSubview:otherThing];
(I guess FTR conceivably you could subclass UIViewController to have more than one view inside it, but that's completely pointless and irrelevant to this question.)
From your UIViewController you can manipulate the subviews in any way you want.
For example [bottomThing doStuff:3.7], bottomThing.hidden=YES, etc etc.
Once again it is absolutely normal to add more subviews inside your main "view" - this is the basic way in which iPhone apps are made. There is only one ".view" - you add more views inside it as you wish. Hope It Helps.
UIView *myView = [[UIView alloc] init];
[self.view addSubview:myView];
[myView release];
I want to create a 'detail view' in my navigation-based app similar to the address book app.
I want to create a UIView that has an UIImageView and a UILabel that I can pass to a UITableVIew's tableHeaderView property when pushed by a navigation controller. The label text and image must take information from the managed object context when it loads.
I started trying to do this using IB, but go fed up when the label text wouldn't update, regardless of where I put the myView.UILabel.text = #"some new text". It just kept presenting the text I entered in the IB inspector window.
So without using IB, how would I go about creating a UIView that has a UILabel and a UIImageView in it?
Should I be creating a new class that is a sub-class of UIViewController or just UIView?
How do I go about creating the sub-views for the label and image?
Where should the text and image URL be set in code? (viewDidLoad or loadView or viewWillLoad)(UIView, UIViewController, detailViewController)?
If you started using IB and the UILabel text wouldn't update, sounds like the IBOutlet of your view controller isn't correctly connected to the label in IB.
Hopefully that will fix your problem with using IB. And in the viewController code, you should update that text in viewDidLoad.
But if you want to do this programmatically, I would make a subclass of UIView (not UIViewController).
And I would override initWithFrame and do all the setup there.
Something like the following:
myView.m
#implementation myView
#synthesize imageView, myLabel;
- (id) initWithFrame:(CGRect) frame
{
if (self = [super initWithFrame:frame]) {
// Setup your image view and add it to the view.
self.imageView = [[[UIImageView alloc] initWithFrame:initWithFrame:frame] autorelease];
self.imageView.image = ...
[self addSubview:self.imageView];
// Setup your label
self.myLabel = [[[UILabel alloc] initWithFrame:frame] autorelease];
self.myLabel.text = #"whatever you like";
[self addSubview:self.myLabel];
}
return self;
}
Make sure to clean up memory properly in the dealloc method of course depending on whether you like make class properties vs class variables.
I have a core data application which uses a navigation controller to drill down to a detail view and then if you edit one of the rows of data in the detail view you get taken to an Edit View for the that single line, like in Apples CoreDataBooks example (except CoreDataBooks only uses a UITextField on its own, not one which is a subview of UITableViewCell like mine)!
The edit view is a UITableviewController which creates its table with a single section single row and a UITextfield in the cell, programatically.
What I want to happen is when you select a row to edit and the edit view is pushed onto the nav stack and the edit view is animated moving across the screen, I want the textfield to be selected as firstResponder so that the keyboard is already showing as the view moves across the screen to take position. Like in the Contacts app or in the CoreDataBooks App.
I currently have the following code in my app which causes the view to load and then you see the keyboard appear (which isn't what I want, I want the keyboard to already be there)
- (void)viewDidAppear:(BOOL)animated {
[super viewDidAppear:animated];
[theTextField becomeFirstResponder];
}
You can't put this in -viewWillAppear as the textfield hasn't been created yet so theTextField is nil. In the CoreDataBooks App where they achieve what i want they load their view from a nib so they use the same code but in -viewWillAppear as the textfield has already been created!
Is there anyway of getting around this without creating a nib, I want to keep the implementation programatic to enable greater flexibility.
Many Thanks
After speaking with the Apple Dev Support Team, I have an answer!
What you need to do is to create an offscreen UITextField in -(void)loadView; and then set it as first responder then on the viewDidLoad method you can set the UITextField in the UITableViewCell to be first responder. Heres some example code (remember I'm doing this in a UITableViewController so I am creating the tableview as well!
- (void)loadView
{
[super loadView];
//Set the view up.
UIView *theView = [[UIView alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.view = theView;
[theView release];
//Create an negatively sized or offscreen textfield
UITextField *hiddenField = [[UITextField alloc] initWithFrame:CGRectMake(0, 0, -10, -10)];
hiddenTextField = hiddenField;
[self.view addSubview:hiddenTextField];
[hiddenField release];
//Create the tableview
UITableView *theTableView = [[UITableView alloc] initWithFrame:[[UIScreen mainScreen] bounds] style:UITableViewStyleGrouped];
theTableView.delegate = self;
theTableView.dataSource = self;
[self.view addSubview:theTableView];
[theTableView release];
//Set the hiddenTextField to become first responder
[hiddenTextField becomeFirstResponder];
//Background for a grouped tableview
self.view.backgroundColor = [UIColor groupTableViewBackgroundColor];
}
- (void)viewDidAppear:(BOOL)animated {
[super viewDidAppear:animated];
//Now the the UITableViewCells UITextField has loaded you can set that as first responder
[theTextField becomeFirstResponder];
}
I hope this helps anyone stuck in the same position as me!
If anyone else can see a better way to do this please say.
Try do it in viewDidAppear method, works for me.
I think the obvious solution is to create the textfield in the init method of the view controller. That is usually where you configure the view because a view controller does require a populated view property.
Then you can set the textfield as first responder in viewWillAppear and the keyboard should be visible as the view slides in.
have you tried using the uinavigationcontroller delegate methods?:
navigationController:willShowViewController:animated: