Wie kann ich den iPhone Kamera Blitz ein- / ausschalten?

Wie kann ich die iPhone-LED-Blitz, an/aus-Programm?

Kommentar zu dem Problem
Vergessen Sie nicht, fügen Sie AVFoundation.Rahmen auch... Kommentarautor: raaz

InformationsquelleAutor der Frage Shahid Aslam | 2011-05-04

  1. 78
    #import <AVFoundation/AVFoundation.h>

    ...

    - (void) turnTorchOn: (bool) on {

    //check if flashlight available
    Class captureDeviceClass = NSClassFromString(@"AVCaptureDevice");
    if (captureDeviceClass != nil) {
        AVCaptureDevice *device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
        if ([device hasTorch] && [device hasFlash]){

            [device lockForConfiguration:nil];
            if (on) {
                [device setTorchMode:AVCaptureTorchModeOn];
                [device setFlashMode:AVCaptureFlashModeOn];
                //torchIsOn = YES; //define as a variable/property if you need to know status 
            } else {
                [device setTorchMode:AVCaptureTorchModeOff];
                [device setFlashMode:AVCaptureFlashModeOff];
                //torchIsOn = NO;            
            }
            [device unlockForConfiguration];
        }
    } }

    InformationsquelleAutor der Antwort Tibidabo

  2. 23

    Kombinierte ich die timer mit dem obigen code.bei mir hat es geklappt...

     - (void)viewDidLoad
        {
         [super viewDidLoad];

         myTimer = [NSTimer scheduledTimerWithTimeInterval:0.5 target:self                    selector:@selector(toggleFlashlight) userInfo:nil repeats:YES];
        //Do any additional setup after loading the view from its nib.
        }
       - (void) toggleFlashlight
       {

    //check if flashlight available
    Class captureDeviceClass = NSClassFromString(@"AVCaptureDevice");
    if (captureDeviceClass != nil) {
        AVCaptureDevice *device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
        if ([device hasTorch] && [device hasFlash]){

            [device lockForConfiguration:nil];
            if (device.torchMode == AVCaptureTorchModeOff) 
            {
                [device setTorchMode:AVCaptureTorchModeOn];
                [device setFlashMode:AVCaptureFlashModeOn];
                //torchIsOn = YES;
            }
            else 
            {
                [device setTorchMode:AVCaptureTorchModeOff];
                [device setFlashMode:AVCaptureFlashModeOff];
               //torchIsOn = NO;            
            }
            [device unlockForConfiguration];
        }
    } }

    InformationsquelleAutor der Antwort girish

  3. -12

    Ihr gehen zu müssen, ein paar leere Aussagen (doSOmethingfoo und showAcitivtyfoo) und einen NSTimer(mytimer) in Ihr .h-Datei, zusammen mit einigen code

     -(void)doSmethingfoo { myTimer = [NSTimer scheduledTimerWithTimeInterval:0.5 target:self     selector:@selector(showActivityfoo) userInfo:nil repeats:YES]; }

    InformationsquelleAutor der Antwort Chauncey Michael Brown

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