I'm sure this is an easy one for someone out there. I have a UISegmentedControl which I am using as a button (so as not to have to use the nasty default button) and I am having trouble getting the target to work....code as follows
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
//read.buttonType = UIBarStyleBlackOpaque;
UISegmentedControl* read = [[[UISegmentedControl alloc] initWithFrame:CGRectMake(5, 50, 310, 54)] autorelease];
[read insertSegmentWithTitle:#"Read" atIndex:0 animated:NO];
read.tintColor = [UIColor colorWithRed:0.3 green:0.3 blue:0.9 alpha:1];
read.segmentedControlStyle = UISegmentedControlStyleBar;
[read addTarget:self action:#selector(changeFilter:sender:) forControlEvents:UIControlEventTouchUpInside];
[read setTag:1];
[self.view addSubview:read];
}
and then
-(void)changeFilter:(id)sender{
}
for some reason, clicking on the UISegmentedControl does not fire the target method.
As an addendum, is there a simpler way to make nice looking UIButtons? I don't have access to Photoshop at work (although I do have gimp installed), so a way which doesn't involve image making would be good. I can't believe that apple didn't supply nice looking UIButtons in the UI, it seems such a fundamental thing to need?
Anyway, thanks for the help mis amigos.
thanks for the answers...I've tried the fix but it still doesn't fire
I now have
[read addTarget:self action:#selector(changeFilter:) forControlEvents:UIControlEventTouchUpInside];
then
#interface
-(void)changeFilter:(id)sender;
and
#implementation
-(void)changeFilter:(id)sender{}
Note that the method is in the same class as the UISegmentedControl. Maybe I should just try using the Glass button API which was suggested, but my boss hates me using third party libraries if there is a way of avoiding it!
The selector is wrong. It should be, action:#selector(changeFilter:), And change the event to forControlEvents:UIControlEventValueChanged, as UISegmentedControl doesn't send any actions for UIControlEventTouchUpInside event.
.h file u forgot to put this
-(void)changeFilter:(id)sender;
then
change this
[read addTarget:self action:#selector(changeFilter:sender:) forControlEvents:UIControlEventTouchUpInside];
To
[read addTarget:self action:#selector(changeFilter:) forControlEvents:UIControlEventValueChanged];
The action will automatically send the sender so just try #selector(changeFilter:).
As for your second question, ios5 will help you out there... but I can't say much about that yet. For now, you can use some uibutton classes that people have made to easily make some good looking buttons. Here's one:
http://hboon.com/glass-buttons-in-iphone-apps-without-using-image-files/
Related
I'm updating some old code, and to make more room in a toolbar, I'm converting the Buttons from test to images. An example of the new and old code in loadView is this:
// New code, doesn't work.
UIButton *toggleKeyboardBtn = [UIButton buttonWithType:UIButtonTypeCustom];
toggleKeyboardBtn.bounds = CGRectMake( 0, 0, showKeyboardImage.size.width, showKeyboardImage.size.height );
[toggleKeyboardBtn setImage:showKeyboardImage forState:UIControlStateNormal];
UIBarButtonItem *toggleKeyboardItem = [[UIBarButtonItem alloc] initWithCustomView:toggleKeyboardBtn];
[toggleKeyboardItem setTarget:self];
[toggleKeyboardItem setAction:#selector(toggleKeyboard:)];
// Original code, works jut fine.
UIBarButtonItem *setupItem = [[[UIBarButtonItem alloc] initWithTitle:#"Setup" style:UIBarButtonItemStyleBordered target:[UIApplication sharedApplication].delegate action:#selector(showSetupView:)] autorelease];
My new code is copied from Cannot set action on UIBarButtonItem, and I'm fairly certain that I'm not making their mistake since my text button is working just fine.
showSetupView() is in my AppController.m file, and the setup screen appears and disappears as the button is pressed.
toggleKeyboard(), OTOH, is in the same file as the loadView() routine, and currently consists of this code:
//- (void)toggleKeyboard {
- (IBAction)toggleKeyboard:(id)sender {
NSLog(#"Entering toggleKeyboard()...");
hiddenKeyboard = !hiddenKeyboard;
[self prepareToolbarsAndStatusbar];
}
Needless to say, although I see the button-press animation, I never see the NSLog message. And one last observation, made by accident. Changing the setAction selector to this:
[toggleKeyboardItem setAction:#selector(noSuchRoutine:)];
compiles cleanly, possibly indicating that my routine name is being ignored for some reason.
Anyone have any ideas? Thanks.
I found the answer! In button action not responding iphone, it's said that the action and target need to be set on the UIButton, not the UIBarButtonItem. I don't know if that's new with the latest version of Xcode, but I guess it is since other questions (such as the one I mention above) use a different technique. Here's my new code:
UIButton *toggleKeyboardButton = [UIButton buttonWithType:UIButtonTypeCustom];
toggleKeyboardButton.bounds = CGRectMake( 0, 0, keyboardAddImage.size.width, keyboardAddImage.size.height );
[toggleKeyboardButton setImage:keyboardAddImage forState:UIControlStateNormal];
[toggleKeyboardButton addTarget:self action:#selector(toggleKeyboard) forControlEvents:UIControlEventTouchUpInside];
UIBarButtonItem *toggleKeyboardItem = [[UIBarButtonItem alloc] initWithCustomView:toggleKeyboardButton];
//[toggleKeyboardItem setTarget:self];
//[toggleKeyboardItem setAction:#selector(toggleKeyboard:)];
Though its too late, but for future references, I would like to quote apple docs for the method,
- (instancetype)initWithCustomView:(UIView *)customView;
The bar button item created by this method does not call
the action method of its target in response to user interactions.
Instead, the bar button item expects the specified custom view to
handle any user interactions and provide an appropriate response.
Did you try
-(void)toggleKeyboard
and
[toggleKeyboardItem setAction:#selector(toggleKeyboard)]; without :
and it made any difference? Is the method declared in the interface file?
I am using the following code to create a custom switch:
UISegmentedControl* switchView=[[UISegmentedControl alloc]
initWithItems:[[NSMutableArray alloc] initWithObjects:#"On",#"Off",nil]];
[switchView setFrame:CGRectMake(20,365,140,28)];
switchView.selectedSegmentIndex=0;
switchView.segmentedControlStyle=UISegmentedControlStyleBar;
[switchView setImage:[UIImage imageNamed:#"onSelected.png"] forSegmentAtIndex:0];
[switchView setImage:[UIImage imageNamed:#"off.png"] forSegmentAtIndex:1];
[switchView addTarget:self action:#selector(checkOnOffState:) forControlEvents:UIControlEventValueChanged];
I would now like to add this control to one of my screens (I believe the correct term is ViewController?). How would I do this in Xcode 4.3?
I looked at a few other posts and was not able to find anything that works. For example, How do I add a custom view to iPhone app's UI? suggested something along the lines of
[[myVC view] addSubview:myView];
and How to customize UISwitch button in iphone? suggested
self.navigationItem.titleView=switchView;
If possible, could you also explain why these approaches did not work? Thanks.
You need to create a class for your switch which is subclass of your UISegmentControl ,
Else you can add this code in your vc directly as well.
Add this code in its initWithFrame method
and then use it in your VC
-(void)viewDidLoad{
urCustomSwitch = [urCustomSwitch alloc] initWithFrame:CGRectMake(20,365,140,28)];
[self.view addSubview:urCustomSwitch];
}
This shall serve your purpose if you are to create custom reusable class.
If you add this switch control i.e. UISegmentedControl in InterfaceBuilder (.xib file)
This task will be much easier for you.
I my application i have added button in NavigationBar like this..
UIBarButtonItem *more=[[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:#"search-25by25.png"] style:UIBarButtonItemStylePlain target:self action:#selector(SelectMission:)];
self.navigationItem.rightBarButtonItem = more;
When i am clicking on button application get's shutdown...
If i am doing same thing with normal button it's working fine can any one help me why it's behaving like this?
Try This
UIImage *i=[UIImage
imageNamed:#"search-25by25.png"];
UIButton *myButton = [UIButton buttonWithType:UIButtonTypeCustom];
myButton.bounds = CGRectMake( 0, 0, i.size.width, i.size.height );
[myButton setImage:i forState:UIControlStateNormal];
[myButton addTarget:self action:#selector(SelectMission:) forControlEvents:UIControlEventTouchUpInside];
UIBarButtonItem *more=[[UIBarButtonItem alloc] initWithCustomView:myButton];
self.navigationItem.rightBarButtonItem
= more;
hope it helps :)
Have you looked in the code for SelectMission:? The code you've posted is only for presenting the button, which from your description appears to be working.
Also if there's anything being dumped into the console (Command-Shift-R)?
Judging by the crash log in your comment, I would say this has nothing to do with the UIBarButtonItem class in particular, and everything to do with your action handler. The crash logs tell the whole story: Your class does not implement a method called SelectMission: that takes one argument. Some caveats about the #selector keyword that you will want to double check:
1) Capitalization. Make sure that the method you implement is SelectMission:. Not selectMission:, selectmission:, Selectmission:, etc.
2) Arguments. The colon indicates that the method SelectMission: takes one argument. If you have implemented it and forgotten the argument it will crash with the exception you posted.
That should help narrow down the issue.
I have created a UIButton by passing an integer value as this.
UIButton* custom_newBackButton = [UIButton buttonWithType:101];
[custom_newBackButton addTarget:self action:#selector(backButtonAction) forControlEvents:UIControlEventTouchUpInside];
[custom_newBackButton setTitle:#"Back" forState:UIControlStateNormal];
UIBarButtonItem* newBackButton = [[UIBarButtonItem alloc] initWithCustomView:custom_newBackButton];
[[self navigationItem] setLeftBarButtonItem: newBackButton];
In some of the classes this works but some of the classes it fails with "Invalid conversion from int to UIButtonType". Is this a recommended way to handle this. I have simply use this 101 to get the back button look and feel.
Regards,
Dilshan
The following button types are officially documented in the Apple documentation material:
typedef enum {
UIButtonTypeCustom = 0,
UIButtonTypeRoundedRect,
UIButtonTypeDetailDisclosure,
UIButtonTypeInfoLight,
UIButtonTypeInfoDark,
UIButtonTypeContactAdd,
} UIButtonType;
Enjoy! Please avoid using direct values. Values of constants might change and break your app.
Explicitly casting it to UIButtonType should work fine, though the constant is undocumented and would be rejected when submitting to App Store if the reviewer would aware of that.
I'm creating a small iPhone app, when application lauches, it will ask the user to sign up or Login. If they choose sign up safari will open. This part is done.
////button code
button = [[UIButton buttonWithType:UIButtonTypeRoundedRect] retain];
button.frame = CGRectMake(10, 150, 300, 50);
[button setTitle:#"Login" forState:UIControlStateNormal];
button.backgroundColor = [UIColor clearColor];
[button addTarget:self action:#selector(myaction:) forControlEvents:UIControlEventTouchUpInside];
button.adjustsImageWhenHighlighted = YES;
[mainView addSubview:button];
[button release];
If they click Login -
How to navigate to next window asking for username / password ? Can I do it button action ?
2.How I will store their info in plist ( if i'm correct ) ?
Thanks in advance.
One way to do (1.) is:
define a LoginViewController class that inherits from UIViewController
create a nib file named "login" with the UI elements for your login view
make your login button action do somehting like:
LoginViewController *controller = [[LoginViewController alloc] initWithNibName:#"login" bundle:nil];
[self presentModalViewController:controller animated:NO];
There are really several different questions here disguised as one.
1: in the method -buttonAction is where your navigation logic will be. It looks like you're probably working from xibs out of Interface Builder
2: You'll need to use the NSDictionary method called -writeToFile:atomically:. The arguments are the path string for the file to be stored on flash memory, and a BOOL YES/NO value that determines if the file is written immediately, or if it checks for errors first. I'd recommend setting atomically: to YES.
I'm gathering from your question that you're not familiar with Cocoa and UIKit. You'll be hard pressed to get a tutorial on how to put your application together. You're going to need to try Google for swapping views and handling page navigation. It's a lot deeper than what I'm describing here.