Toggle button question

[jeffadsl]

hi,

i'm a beginner on Xcode so please help me with some code exemple
for my first post, i have a question :


i work on a midi interface with some buttons sending midi note

this code is for an Uibutton switch
if you press it , it send a midi noteON message,wait a little and send midi noteOFF

my question is :
how to make a toggle button with this code
i want press one time, the button send a midi noteON message, wait
and it sent the midi noteOFF only if i press it again

same question to do this :
how to make a flash button with this code
i press the button and hold my finger on it, so the midi noteON message is transmited,
and when i release the button, only at this time it send a midi noteOFF message

in the .h
@property (retain, nonatomic) IBOutlet UIButton *button6;
- (IBAction) sendMidiData38;



in the .m
- (IBAction) sendMidiData38
{[self performSelectorInBackgroundselector(sendMidiData InBackground38) withObject:button6];}
- (void) sendMidiDataInBackground38
{
const UInt8 note = 101;
const UInt8 noteOn[] = { 0x92, note, 127 };
const UInt8 noteOff[] = { 0x82, note, 0 };

[midi sendBytes:noteOn size:sizeof(noteOn)];
[NSThread sleepForTimeInterval:0.1];
[midi sendBytes:noteOff size:sizeof(noteOff)];
}

Thank's for your future answer(s), but as i told you, i'm a beginner in Xcode so if you can help me give me some code example to explain

 

[xstep]

In iOS, a button has several events each of which can trigger a unique method. So on the Touch Down event, connect that to a method to send the noteOn bytes. If you have to loop to repeatably send the note, you'll need to do that in a thread that is not the main thread. When the button is released, the Touch Up Inside event is triggered so connect that to a different method.

To use the same button in the two different scenarios will be tricky. You'll have to decide and time how long a tap is to turn on the button an leave it on. Anything beyond that time is a hold and release action instead. For some reason I think I've seen Apple code that demonstrates this. Perhaps others here can point to that if it indeed exists.

P.S. I have no experience with MIDI.

 

[jeffadsl]

Th'x : xstep