Typically a BT button click opens a screen or launches something. What is the right way to say "do this function which will record this click somewhere and change the image to a tick"? Kind of like Angry Ninja does in Instant database when someone records that they've been to a restaurant.

In iOS it's pretty simple. 1) create a button in your 'interface' (.h) file: UIButton *btnMyButton; 2) synthesize it in your implementation (.m) file: @synthesize btnMyButton; 3) either include code for, or create a separate method for creating the button: - (void)loadbtnMyButton { // btnMyButton = [UIButton buttonWithType:UIButtonTypeRoundedRect]; [btnMyButton setTitle:@"My Button Title" forState:UIControlStateNormal]; [btnMyButton setFrame:CGRectMake(140, 5, 120, 40)]; // this is both size and screen position coordinates [btnMyButton addTarget:self action:@selector(myCustomMethod) forControlEvents:UIControlEventTouchUpInside]; [[self view] addSubview: btnMyButton]; // } (you would call this in viewWillAppear ([self loadbtnMyButton];), or similar method. or, just use the code within in one of the 'willappear/load' methods) 4) create a method to handle the button click, seen in the 'selector' method of the loadbtnMyButton method: -(void) myCustomMethod { // do something in code when the button clicks } This is how it is done 'in code'. using interface builder is a little easier, but you have to create xib files for each screen size. It's a personal preference... in Android: 1) create a button within your layout xml file <Button android:id="@+id/btnMyButton" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/terms_button" /> 2) in a method, declare your button Button btnMyButton = (Button)screenView.findViewById(R.id. btnMyButton); 3) and create an 'on click listener' to detect button clicks: btnMyButton.setOnClickListener(new OnClickListener() { public void onClick(View v) { BT_debugger.showIt(fragmentName + ": btnMyButton just got clicked!"); } }); It seems a bit odd out of context, but if you nab a copy of my 'smug msg loc' (a free plugin) you can see examples in use for both Android and iOS. hope this helps! Cheers! -- Smug Edit: and to add to your actual 'question', in the button click event, you would tell the 'object' to change to whatever you want it to be. For instance, in iOS there is no 'checkbox', so in my SmugEula, I created a button that uses two images; check 'on' and check 'off'. When the button is tapped, it goes to a method that handles the button action and appearance: -(void)checkTouched { [BT_debugger showIt:self theMessage:@"checkTouched"]; if (sweulaCheckButton.imageView.image == [UIImage imageNamed:@"sw_eula_cb1.png"]) { [BT_debugger showIt:self theMessage:@"checkTouched - 0"]; [sweulaCheckButton setImage:[UIImage imageNamed:@"sw_eula_cb0.png"] forState:UIControlStateNormal]; } else { [BT_debugger showIt:self theMessage:@"checkTouched - 1"]; [sweulaCheckButton setImage:[UIImage imageNamed:@"sw_eula_cb1.png"] forState:UIControlStateNormal]; } }

Thanks Smug, awesome as always!

Sweet writeup, Smug! Thank you, Mr. general Manager :-) -- Niraj