你可以使用Core Graphics框架来实现裁剪和涂鸦功能。以下是实现这两个功能的简单示例代码：
//裁剪功能 UIGraphicsBeginImageContextWithOptions(self.imageView.bounds.size, NO, 0.0); UIBezierPath clipPath = [UIBezierPath bezierPathWithRect:rectToClip]; [clipPath addClip]; [self.imageView.image drawAtPoint:CGPointZero]; UIImage croppedImage = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); self.imageView.image = croppedImage;
//涂鸦功能 UIGraphicsBeginImageContextWithOptions(self.imageView.bounds.size, NO, 0.0); [self.imageView.image drawAtPoint:CGPointZero]; CGContextRef context = UIGraphicsGetCurrentContext(); CGContextSetLineWidth(context, 5.0); CGContextSetStrokeColorWithColor(context, [UIColor redColor].CGColor); CGContextSetBlendMode(context, kCGBlendModeNormal); CGContextBeginPath(context); CGContextMoveToPoint(context, startPoint.x, startPoint.y); CGContextAddLineToPoint(context, endPoint.x, endPoint.y); CGContextStrokePath(context); self.imageView.image = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext();
请根据你自己的需求和实际情况，在代码中进行相应的修改和调整。