I am a very new developer for IOS, i need help, How to create dropdown box in xcode, any one provide me example to create country list in drop down?
Here I found two demos for dropDown list, One is creating custom expandable UITableViewCell like :-
to
source code :- DEMO
AND Another is custom Drop Down list like:-
by clicking of test then open drop down list as bellow like image
source code with Tab Bar:-DEMO
updated source code without Tab Bar :-
http://www.sendspace.com/file/83qws5
I beleive you shouldn't use dropdown boxes in iOS, as it's a desktop OS UI control element. You should think up something else using existing components (like PickerView), that's the words for UI consistency.
And if you need this anyway, you may create a table view, place it beneath your label and a triangular button(which causes it to appear and disappear) and populate it with values.
Since there are no native DropDown elements in iOS, you could make use of a TextField with custom background and a UITableView to accomplish that. Here is how to go about it.
Pseudocode
Create a TextField and set it's delegate to parent controller
Implement UITextFieldDelegate and implement the textFieldShouldBeginEditing method
Create a new UIViewController and implement UITableView in it programmatically.
Create a custom protocol and create it's object (delegate) it.
In textFieldShouldBeginEditing method, load this controller and present it modally passing the required table's data source and set delegate as parent.
in the new tableViewController, implement UITableViewDelegate and implement the didSelectRowAtIndex path method.
Upon row selection, call the delegate with passing appropriate data.
dismiss the modally presented controller.
just for whom searching for small simple swift combo box here in 2016 year, i've tried a few of old and new (but obj-c) libs, and at last selected this:
https://github.com/sw0906/SWCombox
here is screenshot:
The easy and simple way to design a drop down list is by representing it like a UITableView and some animation. This makes it look really like a dropdownlist. Here is a code I used for creating one . For this first import the < QuartzCore/QuartzCore.h > framework.
-(IBAction)DropDownTable:(id)sender
{
TableView.hidden = NO;
if(TableView.frame.origin.y ==203)
{
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:0.5f];
[TableView setFrame:CGRectMake(224, 204, 27, 160)];
[UIView commitAnimations];
[self.view TableView];
}
else if (TableView.frame.origin.y == 204)
{
[TableView setFrame:CGRectMake(224, 203, 27, 0)];
TableView.hidden = YES;
}
[self.view addSubview:TableActivityLevel];
}
First make a tableview , declare its methods and make the array . Put this function on the click of a UIButton and youll see it work !!! Happy coding :)
Related
I can't seem to find any information on what should be a simple issue. I have a table which contains a series of cells. When you tap on the cell it shows the information of that object in detail. I know it is possible to have a button which places all of the data on the screen in EDIT mode. Any tutorials or advice as how to do this (properly/ with best practices)?
Just to be clear this is for iPhone/ Objective-C/ Cocoa.
Thanks,
EDIT 1
Sorry. I know how to put the button there. But how do make the labels editable?
You are confusing two states:
Putting the tableView into editing mode - this is for deleting, or moving cells around in the table, regardless of the cell content. This is controlled by the UITableView.editing property.
and
Putting the tableViewCell into some sort of editing state. There is no official editing state for the cell (i.e. there is no single flag to set to make all UILabels in a cell into editable textFields.) You need to implement all of this logic yourself. If you're using .xibs, a good practice here is to have a different .xib for your cell's editing mode.
You cannot have editable labels. However, you can replace the label with a textfield when the button is pressed, and then update the label once finished.
One way to do this is the following. Create a textfield in the same location as the label and initially set textField.hidden = YES;. Then implement something along these lines:
-(IBAction)editMyCell:(id)sender {
textField.text = cellLabel.text;
cellLabel.hidden = YES;
textField.hidden = NO;
[textField becomeFirstResponder];
}
and when the editing has finished, restore with
-(void)textFieldDidEndEditing:(UITextField *)textField {
cellLabel.text = textField.text;
textField.hidden = YES;
cellLabel.hidden = NO;
[textField resignFirstResponder];
}
You'll probably want to tweak this idea a bit for your situation, but it's probably the simplest thing to implement that achieves what you're after.
There is nothing in the base sdk associated with editing a UIViewController. Normally that kind of logic is defined by the programmer. But I could see someone writing a function that turns all of your UILabels in your UIView into UITextViews so the user can edit the text.
There might be sample code out there but this seems like custom code to me.
probably a very simple question but can't find the right answer anywhere. I am using XCode 4 and working on an iphone app, which probably sums up all the info that I need to provide.
Here it is:
- I created a ViewBasedApplication
- At some point depending on the user input, I load a TableView
But now how on Earth do I add a button or something to return? Note: I can't use a NavigationBased app, that would be easier but would not work for me.
Help anyone?
If you used a UITableViewController, you may want to use a UIViewController instead. In the UIVeiwController, you can add a UITableView along with your own UINavigationBar or, if you don't want to use a UINavigationBar, you could leave room for some type of custom UIButton. Either the UINavigationBar button or your custom UIButton action could trigger a close of your UIViewController.
If you add the UIViewController as a subview, then Cyprian's [self removeFromSuperView]; would work. If you present as a modal as Jamie suggests, you could use [self dismissModalViewControllerAnimated:YES];.
Well I don't know you code but you could always call
[self removeFromSuperView];
I'm very new to xCode and objective-C so I wanted to make a simple textRPG.
I'm currently making a character creation process consisting of 4 xib-files. The only way I got switching views to work was to look at the utility-template. Problem is, now I have the first screen being the delegate for the second screen, being the delegate for the third screen etc. So by the end of the character creation process I can't dismiss the views because that just "steps back" through the views.
When I've searched around for a solution I've found a addSubview-method but it seems like that makes a new view, like, empty to arrange programmatically.
All I need is a simple way to switch from one loaded xib to another xib. Have I misunderstood addSubview or do I need something completely different?
(If it helps: I've worked with VB for several years, in case you notice that I missed some kind of concept concerning views and such)
Thanks in advance! :)
Use this code. It is really simple and works well.
View *view = [[View alloc] initWithNibName:#"xibNameGoesHere" bundle:nil];
view.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
[self presentViewController:view animated:YES completion:nil];
This will switch to another xib file and the two views won't own one another. I am using it in my own game right now.
#Joakim Ok, this is the way I do it. I have a class called RootViewController : UIViewContoller, whose view I add directly to the window. Then I make a subclass of UIView i.e. MyView. All of my views then subclass MyView. I also make an enum for all my views. In RootViewController you should have a switchView:(int)view method that looks something like this:
-(void) switchView:(myView) view
{
[_currentView removeFromSuperview];
switch(view)
{
case titleView:
_currentView = [[TitleView alloc] initWithRoot:self];
break;
case homeView:
_currentView = [[HomeView alloc] initWithRoot:self];
break;
default: break;
}
[self.view addSubview:_currentView];
[_currentView release];
}
in #interface RootViewContoller define MyView *_currentView;
TitleView and HomeView both subclass MyView and have a common method -(id)initWithRoot:(RootViewController*) rvc.
To switch between views use [_rvc switchView:homeView];
Hope this helps :)
It is called UINavigationController. Idea is
1) You push corresponding 'next' controller into navigation controller each time user submits current screen. Bonus - you'll get 'back' button for free on each step of character creation.
2) After character is created you pop all character creation controllers from stack.
Please read View Controller Programming Guide for iOS before trying to 'switch views' and such. You'll save tons of time and nerves.
another idea is not to use interface builder at all. i have been working with iphone apps for two years now and found that interface builder really prolongs the time to actually make something. make your own root controller and think about the logic you need to navigate through the views.
I have a UIToolbar, and then add two UIBarButtonItem to items of UIToolbar. How can I change the color of UIBarButtomItem? I did't find a API in the document.
see "Changing colors of UINavigationBarButtons"
EDIT: I remove the link because the domain is down...
The is the text from google cache:
Alright, here’s another quick tip. “How to change the colors of a button on a toolbar.” Of course, this can be applied to any toolbar but I am going to demonstrate the procedure on a UINavigationBar.
The above image only shows a couple of colors. In truth, you can make the button any color that you want. Fantastic! The code is really simple to do this as well. The first thing that we want to do is open the header file for whichever object will be turning a nav bar button a different color and declare the forward class UINavigationButton. You can get this class by either iterating through the subviews of the UINavigationBar, reading its subviews class names, or by class-dumping UIKit if you have a jailbroken device.
Place the following line before your interface declaration:
#class UINavigationButton;
Now, declare a new method in the header that we will use to actually change the button’s color.
- (void)changeNavigationButtonColorToColor:(UIColor *)newColor
Or something similar to the above line of code.
Now, open up your object’s implementation file and implement the above method. Anywhere in your file, add the following method:
- (void)changeNavigationButtonColorToColor:(UIColor *)newColor {
for (UIView *view in self.navigationController.navigationBar.subviews) {
NSLog(#"%#", [[view class] description]);
if ([[[view class] description] isEqualToString:#"UINavigationButton"]) {
[(UINavigationButton *)view setTintColor:newColor];
}
}
}
As you can see above, this is actually a lot easier than it first appears to be. What we first do is set up a for loop to iterate through the subviews of the UINavigationBar using NSFastEnumeration. We then output the class name of the subview, for future reference. IF the class name is UINavigationButton, then we’ve got our view. All we do is set the tintColor property if the UINavigationButton.
That’s it, we’re done!
Alternatively, if you want a wider scope, I’d suggest creating a new UINavigationBar category and placing the button color changing method in there. This was your method can be performed by any class that uses a UINavigationBar without having to recreate the same method over and over.
Remember, a back button and a navigation button are not the same thing. You will have to color the back button separately.
And as usual, here’s a link to a sample app that demonstrates this code: NavButtonColor.zip
UIBarButtomItem has limitation in customization so you can use UIButton in place of UIBarButtonItem it will gives you more customization.
For a solution that doesn't use a private API.
You can fake it by making a UISegmentedControl look like a UIBarButtonItem.
http://fredandrandall.com/blog/2011/03/31/how-to-change-the-color-of-a-uibarbuttonitem/
I have this app I'm working on, which on a second view asks (textfield) the name for a button to be created on first view. After specifying the name and pressing OK button, the first view pops up (as demanded) but there's no new button, although created indeed. Can I use the following code in a second view method, to "refresh" the first view before presenting itself. What's wrong with this code? Any other approach? Thank you.
-(void)initWithView:(View1Controller *)aSuperview
{
theSuperview = aSuperview;
}
- (IBAction)itemNameButton
{
...
CGRect rectang;
rectang = CGRectMake(0, 0, 320, 460);// just in case
[theSuperview.view setNeedsDisplayInRect:rectang];
...
}
You should adhere to the Model-View-Controller paradigm. Views creating buttons in other views is a bad thing in general. Instead, there should be a controller (probably a UIViewController subclass) that handles receiving the input from view 2 when the user clicks OK (via an action and a outlet to the textfield) and then tells view 1 (a custom view subclass) what to do using a defined set of methods (something like -addButtonWithTitle:(NSString *)buttonTitle). The process of adding the button itself should be fairly straight forward, something like:
- (void)addButtonWithTitle:(NSString *)buttonTitle {
UIButton *newButton = [UIButton buttonWithType:UIButtonTypeRoundedRect]; // whatever type you want
newButton.titleLabel.text = buttonTitle;
[self addSubview:newButton];
newButton.center = self.center; // set your position here
}
A view controller's responsibility is to control a given view. Its responsibility is not to communicate with other controllers in order to ask them to change their views, so doing this sort of thing is usually an indication of bad design.
You should have a method in your superview's controller which adds the button to its view, and then use delegation in order to be notified by your subview when it's necessary to add the button.
For a nice and simple introduction to delegates and protocols, I found this blog post to be one of the best out there.