相关疑难解决方法(0)

我从一个类似的问题中选择了以下代码,但是我没有运气好.

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {

    NSLog(@"Check #1");

    UITouch* touch = [touches anyObject];
    self.currentPath = [UIBezierPath bezierPath];
    currentPath.lineWidth = 3.0;
    [currentPath moveToPoint:[touch locationInView:self.view]];
    [paths addObject:self.currentPath];
}

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
    UITouch *touch = [touches anyObject];
    [self.currentPath addLineToPoint:[touch locationInView:self.view]];
    [self.view setNeedsDisplay];
}

- (void)drawRect:(CGRect)rect {
    [[UIColor redColor] set];
    for (UIBezierPath *path in paths) {
        NSLog(@"Check #2?");
        [path stroke];
    }
}

我从中获得的是我需要使用,UIBezierPath但我不知道如何让它跟随我的手指.我只想绘制一条线,在用户触摸时启动它并在它们拿起手指的地方结束它.

如何使用UIBezierPath实现此线条图？