आईओएसयूफ़ेस - आईओएस प्राइवेट एपीआई - पृष्ठभूमि में स्क्रीनशॉट कैप्चर करें

Question

मैं पृष्ठभूमि सेवा से एक स्क्रीनशॉट कैप्चर करना चाहता हूं। निजी एपीआई ठीक है क्योंकि मुझे ऐप स्टोर में जमा करने की आवश्यकता नहीं है। मैंने पहले से ही UIGetScreenImage की कोशिश की है और यह पृष्ठभूमि ऐप से काम नहीं करता है।

मैं निम्नलिखित कोड का उपयोग कर रहा हूं जो मुझे एसओ से मिला है। IOSurfaceCreate मेरे लिए शून्य वापस आती है। किसी भी मदद की सराहना की।

CFMutableDictionaryRef dict; 
     IOSurfaceRef screenSurface = NULL; 

     char pixelFormat[4] = {'A','R','G','B'}; 
     dict = CFDictionaryCreateMutable(kCFAllocatorDefault, 0, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks); 

     uint32_t width ; 
     uint32_t height; 
     void *pitch; 
     void *bPE; 
     void *size; 
     CFDictionarySetValue(dict, kIOSurfaceIsGlobal, kCFBooleanTrue); 
     CFDictionarySetValue(dict, kIOSurfaceBytesPerRow, CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &pitch)); 
     CFDictionarySetValue(dict, kIOSurfaceBytesPerElement, CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &bPE)); 
     CFDictionarySetValue(dict, kIOSurfaceWidth, CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &width)); 
     CFDictionarySetValue(dict, kIOSurfaceHeight, CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &height)); 
     CFDictionarySetValue(dict, kIOSurfacePixelFormat, CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, pixelFormat)); 
     CFDictionarySetValue(dict, kIOSurfaceAllocSize, CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &size)); 

     IOSurfaceRef destSurf = IOSurfaceCreate(dict); 
     IOSurfaceAcceleratorRef outAcc; 
     IOSurfaceAcceleratorCreate(NULL, 0, &outAcc); 

     CFDictionaryRef ed = (__bridge CFDictionaryRef)[NSDictionary dictionaryWithObjectsAndKeys: nil]; 
     IOSurfaceAcceleratorTransferSurface(outAcc, screenSurface, destSurf, ed, NULL); 
     uint32_t aseed; 
     IOSurfaceUnlock(screenSurface, kIOSurfaceLockReadOnly, &aseed); 

     CGDataProviderRef provider = CGDataProviderCreateWithData(NULL, IOSurfaceGetBaseAddress(destSurf), (width*height*4), NULL); 
     CGImageRef cgImage=CGImageCreate(width, height, 8, 8*4, IOSurfaceGetBytesPerRow(destSurf), CGColorSpaceCreateDeviceRGB(), kCGImageAlphaNoneSkipFirst | kCGBitmapByteOrder32Little, provider, NULL, YES, kCGRenderingIntentDefault); 
     UIImage *image = [UIImage imageWithCGImage: cgImage]; 
     UIImageWriteToSavedPhotosAlbum(image, self_object, nil, nil); 
     CGImageRelease(cgImage); 
     CFRelease(destSurf); 

Answer 1

2 स्थानों से कोड जोड़ने के बाद, मैं फोटो एलबम में फोटो सहेजने में सक्षम था (पृष्ठभूमि में मेरे आवेदन के साथ)।

IOSurfaces - Artefacts in video and unable to grab video surfaces

https://github.com/tomcool420/SMFramework/blob/master/SMFScreenCapture.m

बाहर कोशिश करते हैं और मुझे पता है कि वह आपके लिए काम करता है तो बताएं।

-(void)SavePhoto 
{ 
    IOMobileFramebufferConnection connect; 
    kern_return_t result; 
    IOSurfaceRef screenSurface = NULL; 

    io_service_t framebufferService = IOServiceGetMatchingService(kIOMasterPortDefault, IOServiceMatching("AppleH1CLCD")); 
    if(!framebufferService) 
     framebufferService = IOServiceGetMatchingService(kIOMasterPortDefault, IOServiceMatching("AppleM2CLCD")); 
    if(!framebufferService) 
     framebufferService = IOServiceGetMatchingService(kIOMasterPortDefault, IOServiceMatching("AppleCLCD")); 

    result = IOMobileFramebufferOpen(framebufferService, mach_task_self(), 0, &connect); 

    result = IOMobileFramebufferGetLayerDefaultSurface(connect, 0, &screenSurface); 

    uint32_t aseed; 
    IOSurfaceLock(screenSurface, kIOSurfaceLockReadOnly, &aseed); 
    uint32_t width = IOSurfaceGetWidth(screenSurface); 
    uint32_t height = IOSurfaceGetHeight(screenSurface); 
    //int m_width = 320; 
    //int m_height = 480; 
    CFMutableDictionaryRef dict; 
    int pitch = width*4, size = width*height*4; 
    int bPE=4; 
    char pixelFormat[4] = {'A','R','G','B'}; 
    dict = CFDictionaryCreateMutable(kCFAllocatorDefault, 0, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks); 
    CFDictionarySetValue(dict, kIOSurfaceIsGlobal, kCFBooleanTrue); 
    CFDictionarySetValue(dict, kIOSurfaceBytesPerRow, CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &pitch)); 
    CFDictionarySetValue(dict, kIOSurfaceBytesPerElement, CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &bPE)); 
    CFDictionarySetValue(dict, kIOSurfaceWidth, CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &width)); 
    CFDictionarySetValue(dict, kIOSurfaceHeight, CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &height)); 
    CFDictionarySetValue(dict, kIOSurfacePixelFormat, CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, pixelFormat)); 
    CFDictionarySetValue(dict, kIOSurfaceAllocSize, CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &size)); 

    IOSurfaceRef destSurf = IOSurfaceCreate(dict); 

    void* outAcc; 
    IOSurfaceAcceleratorCreate(NULL, 0, &outAcc); 

    IOSurfaceAcceleratorTransferSurface(outAcc, screenSurface, destSurf, dict, NULL); 

    IOSurfaceUnlock(screenSurface, kIOSurfaceLockReadOnly, &aseed); 
    CFRelease(outAcc); 

    CGDataProviderRef provider = CGDataProviderCreateWithData(NULL, IOSurfaceGetBaseAddress(destSurf), (width * height * 4), NULL); 
    CGImageRef cgImage=CGImageCreate(width, height, 8, 
            8*4, IOSurfaceGetBytesPerRow(destSurf), 
            CGColorSpaceCreateDeviceRGB(), kCGImageAlphaNoneSkipFirst |kCGBitmapByteOrder32Little, 
            provider, NULL, 
            YES, kCGRenderingIntentDefault); 
    UIImage *img = [UIImage imageWithCGImage:cgImage]; 
    UIImageWriteToSavedPhotosAlbum(img, self, nil, nil); 

    // MOST RELEVANT PART OF CODE 

    //CVPixelBufferCreateWithBytes(NULL, width, height, kCVPixelFormatType_32BGRA, IOSurfaceGetBaseAddress(destSurf), IOSurfaceGetBytesPerRow(destSurf), NULL, NULL, NULL, &sampleBuffer); 
}