Quick Look Doesn't Work!

GeneratePreviewForURL.m

#include <CoreFoundation/CoreFoundation.h>
#include <CoreServices/CoreServices.h>
#include <QuickLook/QuickLook.h>
#include <Cocoa/Cocoa.h>

OSStatus GeneratePreviewForURL(void *thisInterface, QLPreviewRequestRef preview, CFURLRef url, CFStringRef contentTypeUTI, CFDictionaryRef options);
void CancelPreviewGeneration(void *thisInterface, QLPreviewRequestRef preview);

OSStatus GeneratePreviewForURL(void *thisInterface, QLPreviewRequestRef preview, CFURLRef url, CFStringRef contentTypeUTI, CFDictionaryRef options)
{
    @autoreleasepool {
        NSURL *inputImageURL = (__bridge_transfer NSURL *)(CFBundleCopyResourceURL(QLPreviewRequestGetGeneratorBundle(preview),
                                                                                   (__bridge CFStringRef)@"MyImage",
                                                                                   (__bridge CFStringRef)@"png", NULL));
        NSImage *inputImage = [[NSImage alloc] initWithContentsOfURL:inputImageURL];

        QLPreviewRequestSetDataRepresentation(preview,
                                              (__bridge CFDataRef)([inputImage TIFFRepresentation]),
                                              kUTTypeImage,
                                              nil);
    }
    return noErr;
}

void CancelPreviewGeneration(void *thisInterface, QLPreviewRequestRef preview)
{
    // Implement only if supported
}