I'm trying desperately to design my UI programmatically.
But I think I'm in trouble to understand the concept.
Basically I want a UI which contains different UIViews and a UITableView.
But now I'm stuck with the UITableView.
So my "main view" which should contain all these views is called AddListViewController(it inherence from UIViewController).
In the loadView method of this class I'm trying to add a table, but no chance. Has anyone a good example for me. I'm really dont see the point for a separate UITableView and UITableViewController.
You can create a new UITableView, very simply like this:
UITableView * tableView = [[UITableView alloc] initWithFrame:CGRectMake(0, 0, 320, 460) style:UITableViewStylePlain];
[tableView setDataSource:self];
[tableView setDelegate:self];
[self.view addSubview:tableView];
[tableView release];
EDIT: The above answer beat me to it.
Just create your UITableView and add it as subview:
UITableView *table =
[[UITableView alloc] initWithFrame:CGRectMake(x, y, width, height)
style:UITableViewStyleGrouped];
...
[self.view addSubview: table];
[table release];
In loadView, you have to make every view - including the overall view associated with the view controller.
You perhaps want to do what you are trying to do in viewDidLoad instead?
i many be late in answering but still i am answering it
use:
shareListView.delegate = self;
shareListView.dataSource = self;
Related
I use a UIViewController XIB to create my UITableViewCell in IB then I implemented it in code like this:
if(cell == nil)
{
UIViewController *viewController = [[UIViewController alloc] initWithNibName:#"TotalViewCell" bundle:nil];
cell = (TotalViewCell *)viewController.view;
//[viewController release];
}
[[cell totalButton] setTitle:#"$100,000" forState:UIControlStateNormal];
// Action when totalButton is tapped
[[cell totalButton] addTarget:self action:#selector(showTotalDetail:) forControlEvents:UIControlEventTouchUpInside];
return cell;
Usually, I would release the viewController but I put a UIButton inside that cell and when the user taps the button, showTotalDetail gets called. This is the code for showTotalDetail:
-(void)showTotalDetail:(id)sender
{
// Move the totalTableView up!
CGRect totalDetailTableViewFrame = CGRectMake(20, 200, 280, 200);
[totalTableView setFrame:totalDetailTableViewFrame];
// Reload the new totalTableView
[self viewWillAppear:YES];
}
The function basically resizes the tableView and moves it to a different location on the screen. So, if I release the viewController, I get EXC_BAD_ACCESS error. It works if I don't release but I'm afraid I will have memory leaks.
Any advice?
Thanks.
You’re creating a UIViewController for each UITableViewCell? That’s pretty non-standard behavior. If you need to customize the behavior of a UITableViewCell, it’s probably better to subclass it than to use a view controller.
If you need to load a table view cell from a nib, look at Apple’s Table View Programming Guide for iOS. That example is in there without using a view controller.
As to your question: you’re right that in this scenario, the UIViewController will leak.
please I need some advice about design approaches in iPhone programming.
I want to display a table view (with three cells that will never change) and a UIDatePicker.
I don't use Interface Builder.
I created a UIViewController subclass and tried to put all together in its viewDidLoad method:
UITableView *myView = [[UITableView alloc] initWithFrame:CGRectMake(0, 0, 320, 250) style:UITableViewStyleGrouped];
[self.view addSubview:myView];
datePicker = [[UIDatePicker alloc] initWithFrame:CGRectMake(0, 250, 320, 216)];`
and other initialization params...
[self.view addSubview:datePicker];
I miss something, I don't understand how to add UITableViewCell objects to myView?
I'm all wrong?
You add it in the tableView:cellForRowAtIndexPath method in the UITableViewDataSource protocol. See the example here: http://iosdevelopertips.com/user-interface/creating-unique-looking-tables-with-custom-cells.html
Yes, as jeremie stated you need to add the some UITableViewDelegate and UITableViewDataSource methods to get a UITableView fully functional.
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:
I have a view that was created with all of the default UITableView stuff, but now I need to add a header area above where the UITableView is (so the UITableView will scroll normally, but the top 100px of the screen or so will have static header content). I don't see where I can resize the UITableView in IB, and am not sure how to do this.
Does anyone know?
You can use UITableViewDelegate methods to create a custom header view for a table and specify the height, namely tableView:viewForHeaderInSection: and tableView:heightForHeaderInSection:. You can add whatever you like to the view. Here's an example that adds a right aligned UILabel:
- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section {
UIView *headerView = [[UIView alloc] initWithFrame:CGRectMake(0,0,tableView.frame.size.width,30)];
UILabel *headerLabel = [[UILabel alloc] initWithFrame:CGRectMake(60, 0, headerView.frame.size.width-120.0, headerView.frame.size.height)];
headerLabel.textAlignment = NSTextAlignmentRight;
headerLabel.text = [titleArray objectAtIndex:section];
headerLabel.backgroundColor = [UIColor clearColor];
[headerView addSubview:headerLabel];
return headerView;
}
-(CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section {
return 30.0;
}
Why don't you use the UITableView provided header?. As follow:
- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
{
return #"My Title";
}
Additionally you may resize your table view in IB by dragging the borders.
When you add a UIView or one of its subclasses onto the UITableView using IB (just drag a UIView and drop it onto the UPPER part of UITableView of yours), it automatically adds that UIView component and makes it the "tableHeader" component.
Each UITableView has one tableHeader and one tableFooter component reserved...
This way the new view would be a part of the UITable, and scroll with it or appear/disappear or whatever you do to the table. You can change its hidden property if you need conditional behavior.
On the other hand, if you want the header view stay put, as the table scrolls, then it is better to make the table smaller and put the header above it as suggested in other answers...
I finally solved this problem the right way without changing the base class. The one answer to add the view to the parent nav controller is nice but the transitions look horrible.
The fix is actually easy. The trick is to create custom setter and getter for self.tableView property. Then, in loadView, you replace the view with a fresh UIView and add the tableView to it. Then you're free to add subviews around the tableView. Here's how it's done:
In header:
#interface CustomTableViewController : UITableViewController
{
UITableView *tableView;
}
In .m:
- (UITableView*)tableView
{
return tableView;
}
- (void)setTableView:(UITableView *)newTableView
{
if ( newTableView != tableView )
{
[tableView release];
tableView = [newTableView retain];
}
}
- (void)loadView {
[super loadView];
//save current tableview, then replace view with a regular uiview
self.tableView = (UITableView*)self.view;
self.view = [[UIView alloc] initWithFrame:self.tableView.frame];
[self.view addSubview:self.tableView];
//code below adds some custom stuff above the table
UIView *customHeader = [[UIView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, 20)];
customHeader.backgroundColor = [UIColor redColor];
[self.view addSubview:customHeader];
[customHeader release];
self.tableView.frame = CGRectMake(0, customHeader.frame.size.height, self.view.frame.size.width, self.view.frame.size.height - customHeader.frame.size.height);
}
- (void)viewDidUnload
{
self.tableView = nil;
[super viewDidUnload];
}
Enjoy!
You will have to embed the UITableView in a UIView alongwith another view (which you are referring to as header section).
So, the UIView will have 2 subviews. The header view followed by the table view.
UIView(parent)
UIView (header)
UITableView (table)
Hope this helps.
I like the answer from noodl_es (upvoted), because it provides the functionality and behavior you want, yet you don't have to worry about resizing the UITableView: that is handled for you automatically. However, the solution is best suitable only if the header information pertains specifically to the first section of the table (or if the table has only one section). If the table has more than one section, then the header of the second section will push away the header of the first section when scrolled up, and therefore the header view will not appear to pertain to the whole table.
Found a solution at iphonedevsdk
Instead of doing this:
[tableViewController.view addSubview:viewSubclass];
do this
[tableViewController.navigationController.view addSubview:viewSubclass];
Suppose to have your UITableViewController
#interface MXMTableViewController : UITableViewController <UITableViewDelegate,UIScrollViewDelegate> {
/// your table view interface here
}
and a xib with you simple UITableView defined yet in it, you can do as Mihir says overriding the loadView method like this:
- (void)loadView {
[super loadView];
UIView *mainView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 480)];
self.view = mainView;
[mainView release];
// Add Header View
UIView *headerView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 36)];
headerView.backgroundColor = [UIColor redColor];
[self.view addSubview:headerView];
// now, move your table view down. Check you nib to choose
// the right Y-axis offset
CGRect f = tableView.frame;
f.origin.y += headerView.frame.size.height/2;
tableView.frame = f;
// Add the table view to the container view
[self.view addSubview:self.tableView];
// Add footer
UIView *footerView = [[UIView alloc] initWithFrame:CGRectMake(0, self.tableView.frame.size.height, 320, 125)];
footerView.backgroundColor = [UIColor redColor];
[self.view addSubview:footerView];
[footerView release];
[headerView release];
}
...and that's it. You have a UITableView with fixed header and footer.
PS. You may now use your xib custom views as the header and footer's views.
First a little background info:
I have UIViewController that contains a UITableView. In the loadView method (after initialization of the table), I set the UIViewControllers view to the table view with: self.view = tableView;
What I want is a view on the top of the screen (before the UITableView), that doesn't scroll with the rest of the table view when it is scrolled. I have tried adding my UIView to the table view's tableViewHeader, which displays correctly but scrolls with the rest of the table.
Is there any easy fix for this? Either way, any hints towards a solution is greatly appreciated.
EDIT:
Come to think of it, what I want is something like the stock application where the bottom part is stationary and the rest of the screen is a UITableView. The only difference is that I want the stationary part at the top of the screen.
As kmit has already pointed out, you can easily add more than one subview to your view. So, don't set the table view directly as self.view, but rather create a blank UIView (as container) and add the table view as well as the header view as subviews to that view. You can control the views' extents via their frame attributes. A simple example:
- (void)loadView {
UIView* view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 460)];
[view setAutoresizingMask:UIViewAutoresizingFlexibleHeight|UIViewAutoresizingFlexibleWidth];
// header view
HeaderView* headerView = [[HeaderView alloc] initWithFrame:CGRectMake(0, 0, 320, 182)];
self.headerView = headerView; // in case you need the reference later on
[view addSubview:headerView];
[headerView release];
// table view
UITableView* tableView = [[UITableView alloc] initWithFrame:CGRectMake(0, 182, 320, 186) style:UITableViewStylePlain];
[tableView setAutoresizingMask:UIViewAutoresizingFlexibleHeight|UIViewAutoresizingFlexibleWidth];
tableView.delegate = self;
tableView.dataSource = self;
[view addSubview:tableView];
self.tableView = tableView;
[tableView release];
self.view = view;
[view release];
}
As an alternative to creating the containing UIView manually, you can call [super loadView] at the beginning of your loadView implementation.
Is there a reason you are setting the view of the UIViewController to that of the UITableView? Why not handle the UITableView as a subview? That would allow you to add anything you want above the UITableView -another view, empty space with the view of the UIViewController as your background, etc.