holdtom
试试这个非常简单的代码:我曾经在我的迷宫游戏中检测到墙壁(我需要的唯一信息是alpha通道,但我包含了代码以获取其他颜色):- (BOOL)isWallPixel:(UIImage *)image xCoordinate:(int)x yCoordinate:(int)y { CFDataRef pixelData = CGDataProviderCopyData(CGImageGetDataProvider(image.CGImage)); const UInt8* data = CFDataGetBytePtr(pixelData); int pixelInfo = ((image.size.width * y) + x ) * 4; // The image is png //UInt8 red = data[pixelInfo]; // If you need this info, enable it //UInt8 green = data[(pixelInfo + 1)]; // If you need this info, enable it //UInt8 blue = data[pixelInfo + 2]; // If you need this info, enable it UInt8 alpha = data[pixelInfo + 3]; // I need only this info for my maze game CFRelease(pixelData); //UIColor* color = [UIColor colorWithRed:red/255.0f green:green/255.0f blue:blue/255.0f alpha:alpha/255.0f]; // The pixel color info if (alpha) return YES; else return NO;}