[英]How to align UIButtons within a circle?
Say for example I have 20 buttons.比如说我有 20 个按钮。 How can I add a subView of the UIView of this button in a circular format?
如何以循环格式添加此按钮的 UIView 的子视图?
This will place the buttons around a circle of a given radius at a given center.这会将按钮放置在给定中心的给定半径的圆周围。 It will also rotate each button using the
transform
property of UIView.它还将使用 UIView 的
transform
属性旋转每个按钮。
Hope it helps.希望能帮助到你。 :)
:)
- (void)viewDidLoad
{
[super viewDidLoad];
NSArray *buttons = /* you buttons here */
float curAngle = 0;
float incAngle = ( 360.0/(buttons.count) )*PI/180.0;
CGPoint circleCenter = CGPointMake(160, 200); /* given center */
float circleRadius = 100; /* given radius */
for (UIButton *button in buttons)
{
CGPoint buttonCenter;
buttonCenter.x = circleCenter.x + cos(curAngle)*circleRadius;
buttonCenter.y = circleCenter.y + sin(curAngle)*circleRadius;
button.transform = CGAffineTransformRotate(button.transform, curAngle);
button.center = buttonCenter;
[self.view addSubview:button];
curAngle += incAngle;
}
}
Result:结果:
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