问iPad图形用户界面仅在触摸后更新

EN

-(void) startReadingWithTimeRange:(STimeRange *) timeRange;
{
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init]; // Top-level pool
    //setting the time range for reading the file
    [assetReader setTimeRange:timeRange.timeRange];

    //start reading
    [assetReader startReading];

    //declearing about the buffer
    CMSampleBufferRef buffer;
    int z = 0;
    while ( [assetReader status]==AVAssetReaderStatusReading)
    {
        z++;
        //reading buffer
        buffer = [assetReaderTrackOutput copyNextSampleBuffer];

        if (buffer == NULL) break;
        //converting the buffer to UIImage
        UIImage *frameImage = imageFromSampleBuffer(buffer);
        CMTime time = CMSampleBufferGetOutputPresentationTimeStamp(buffer);
        NSLog(@"###duration %lld",time.value/time.timescale);


        SFrame *frame = [[SFrame alloc] initWithImage:frameImage andTime:time];
        //add it to the frame array
        [framesArray addObject:frame];

        [frame release];
        //check if buffer is not null and needed release


        //release the buffer
        CFRelease(buffer);


        if ([framesArray count] > 100 && self.buffering) {
            [self willChangeValueForKey:@"buffering"];
            self.buffering = NO;
            [self didChangeValueForKey:@"buffering"];

        }


    }
    [pool release];

}