如何将图像分割成多个部分？

Question

任何机构都可以向我解释一下图像在iPhone OS中如何(同样且不平等地)分成多个部分.如果您提供示例代码,对我非常有帮助.

Answer 1

我已经调整了一些我从Bill Dudney的核心动画书中获得的代码来完成这个任务:

- (NSArray*)splitImageIntoRects:(CGImageRef)anImage{

    CGSize imageSize = CGSizeMake(CGImageGetWidth(anImage), CGImageGetHeight(anImage));

    NSMutableArray *splitLayers = [NSMutableArray array];

            kXSlices = 3;
            kYSlices = 3;        

    for(int x = 0;x < kXSlices;x++) {
        for(int y = 0;y < kYSlices;y++) {
            CGRect frame = CGRectMake((imageSize.width / kXSlices) * x,
                                     (imageSize.height / kYSlices) * y,
                                     (imageSize.width / kXSlices),
                                     (imageSize.height / kYSlices));

            CALayer *layer = [CALayer layer];
            layer.frame = frame;                                                    
            CGImageRef subimage = CGImageCreateWithImageInRect(drawnImage, frame);
            layer.contents = (id)subimage;
            CFRelease(subimage);
            [splitLayers addObject:layer];
        }
    }
    return splitLayers; 
}

注意:获取CGImageRef:

CGImageRef anImage = [myUIImage CGImage];