ios - 如何在iOS中的旋转轮中增加轮的尺寸？

我正在使用旋转轮来开发iPad应用程序。我使用了此链接http://www.raywenderlich.com/9864/how-to-create-a-rotating-wheel-control-with-uikit中给出的代码。为此，我增加了旋转轮架的尺寸。我用下面的代码

SMRotaryWheel *wheel = [[SMRotaryWheel alloc] initWithFrame:CGRectMake(0, 0, 400, 400)
                                                andDelegate:self
                                               withSections:8];

wheel.center = CGPointMake(400,300);
[self.view addSubview:wheel];

这样会增加图像尺寸。旋转轮的尺寸相同。我想将轮圈增加到更大。我已经使用下面的代码绘制了轮子。请帮我做。

 - (void) drawWheel {
    container = [[UIView alloc] initWithFrame:self.frame];

    CGFloat angleSize = 2*M_PI/numberOfSections;

    for (int i = 0; i < numberOfSections; i++) {
        UIImageView *im = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"segment.png"]];

        im.layer.anchorPoint = CGPointMake(1.0f, 0.5f);
        im.layer.position = CGPointMake(container.bounds.size.width/2.0-container.frame.origin.x,
                                        container.bounds.size.height/2.0-container.frame.origin.y);
        im.transform = CGAffineTransformMakeRotation(angleSize*i);
        im.alpha = minAlphavalue;
        im.tag = i;

        if (i == 0) {
            im.alpha = maxAlphavalue;
        }

        UIImageView *cloveImage = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 120, 120)];
        cloveImage.image = [UIImage imageNamed:[NSString stringWithFormat:@"icon%i.png", i]];
        [im addSubview:cloveImage];

        [container addSubview:im];
    }

    container.userInteractionEnabled = NO;
    [self addSubview:container];

    cloves = [NSMutableArray arrayWithCapacity:numberOfSections];

    UIImageView *bg = [[UIImageView alloc] initWithFrame:self.frame];
    bg.image = [UIImage imageNamed:@"bg.png"];
    [self addSubview:bg];

    UIImageView *mask = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 58, 58)];
    mask.image =[UIImage imageNamed:@"centerButton.png"] ;
    mask.center = self.center;
    mask.center = CGPointMake(mask.center.x, mask.center.y+3);
    [self addSubview:mask];

    if (numberOfSections % 2 == 0) {

        [self buildClovesEven];
    } else {

        [self buildClovesOdd];
    }

    [self.delegate wheelDidChangeValue:[self getCloveName:currentValue]];
}

我需要将灰色圆圈放大到外面的蓝色圆圈。

最佳答案

我不是专家，但这就是我的工作方式。没关系，我已经使用了标签，但是它的大小可以调整。希望您可以从中获得一些帮助

for (int i = 0; i < numberOfSections; i++) {
    UIImageView *im = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"segment.png"]];
    im.frame = CGRectMake( 0 ,0, self.frame.size.width / 2.2,  M_PI * (container.frame.size.width   / numberOfSections) );
    im.layer.anchorPoint = CGPointMake(1.0f, 0.5f);
    im.layer.position = CGPointMake(container.bounds.size.width/2.0-container.frame.origin.x,
                                    container.bounds.size.height/2.0-container.frame.origin.y);
    im.transform = CGAffineTransformMakeRotation(angleSize*i);
    im.tag = i;
    [container addSubview:im];
}

现在可以将这些部分的大小调整为正确的大小，

您可能需要尝试使用这些值才能获得理想的效果。
您将遇到的问题是原始图像的曲线，它会导致剪切。
更好的方法可能是动态绘制图像，但我仍在学习如何自我实现。