iphone - 如何将图像动态排列成一个圆圈
<p><p>如何在圆形图像中动态排列图标(UIButtons，带有 backgroundImages)。类似的东西应该像同心圆。</p>
<p>我正在使用以下代码，</p>
<pre><code>UIImageView *container = [ initWithFrame:CGRectMake(0.0, 0.0f, 299.0f, 298.0f)];
container.image = ;
container.center = CGPointMake(self.view.bounds.size.width/2.0, self.view.bounds.size.height/2.0);
;
NSArray *imagesArray = [initWithObjects:,,,,, nil];
int numberOfSections = 5;
CGFloat angleSize = 2*M_PI/numberOfSections;
for (int j = 0; j < numberOfSections; ++j) {
UIButton *sectionLabel = [ initWithFrame:CGRectMake(0.0f, 0.0f, 150.0f, 128.0f)];
forState:UIControlStateNormal];
sectionLabel.layer.anchorPoint = CGPointMake(0.9f, 0.1f);
sectionLabel.layer.position = CGPointMake(container.bounds.size.width/2.0, container.bounds.size.height/2.0); // places anchorPoint of each label directly in the center of the circle.
sectionLabel.transform = CGAffineTransformMakeRotation(angleSize*j);
;
NSLog(@"section label x and y is %f ,%f",sectionLabel.frame.origin.x,sectionLabel.frame.origin.y);
}
;
</code></pre>
<p>提前致谢</p></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>你可以使用这段代码:</p>
<pre><code>UIButton *currentButton;
int buttonCount = 20;
int radius = 200;
float angleBetweenButtons = (2 * M_PI) / buttonCount;
float x = 0;
float y = 0;
CGAffineTransform rotationTransform;
for (int i = 0; i < buttonCount; i++)
{
// get your button from array or something
currentButton = ...
...
x = radius + cosf(i * angleBetweenButtons) * radius;
y = radius + sinf(i * angleBetweenButtons) * radius;
rotationTransform = CGAffineTransformIdentity;
rotationTransform = CGAffineTransformRotate(rotationTransform, (i * angleBetweenButtons));
currentButton.center = CGPointMake(x, y);
currentButton.transform = rotationTransform;
}
</code></pre></p>
<p style="font-size: 20px;">关于iphone - 如何将图像动态排列成一个圆圈，我们在Stack Overflow上找到一个类似的问题：
<a href="https://stackoverflow.com/questions/12562458/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/12562458/
</a>
</p>
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