#import "GWRoundView.h"@interface GWRoundView (){        CGFloat _Width;    CGFloat _Height;}//中心按钮中心点，中心圆和周围圆的圆心距，圆心夹角，@property(nonatomic,assign)CGPoint btnCenter;@property(nonatomic,assign)CGFloat R;@property(nonatomic,assign)CGFloat angle;@end@implementation GWRoundView-(instancetype)initWithFrame:(CGRect)frame{        self = [super initWithFrame:frame];    if (self) {                [self setRoundButton];    }    return self;}-(void)setRoundButton{        _Width = self.frame.size.width;    _Height = self.frame.size.height;        CGFloat n=7; //小圆的个数    self.angle = 2*M_PI/n;    CGFloat a = 10; //小圆的间距    self.R = 90; //中心圆和周围圆的圆心距    CGFloat r = self.R*sinf(self.angle/2.0)-a/2.0; //小圆的半径        UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];    button.frame = CGRectMake(_Width/2-40, _Width/2-40, 80, 80);    button.tag = 300;    button.layer.cornerRadius = 80/2;    //button.backgroundColor = [UIColor redColor];    [button setTitle:@"世界" forState:UIControlStateNormal];    [button setBackgroundImage:[UIImage imageNamed:@"earth"] forState:UIControlStateNormal];    self.btnCenter = button.center;    [button addTarget:self action:@selector(buttonClick:) forControlEvents:UIControlEventTouchUpInside];    [self addSubview:button];        NSArray *array = @[@"亚洲",@"欧洲",@"北美",@"南美",@"大洋",@"非洲",@"南极"];    for (int i=0; i<n; i++) {                UIButton *btn = [UIButton buttonWithType:UIButtonTypeRoundedRect];        btn.frame = CGRectMake(0, 0, 2*r, 2*r);        btn.center = self.btnCenter;        btn.tag = 100+i;        btn.alpha = 0;        btn.layer.cornerRadius = r;        //btn.backgroundColor = [UIColor yellowColor];        [btn setTitle:array[i] forState:UIControlStateNormal];        [btn setTitleColor:[UIColor brownColor] forState:UIControlStateNormal];        [btn setTitleColor:[UIColor purpleColor] forState:UIControlStateSelected];        [btn setBackgroundImage:[UIImage imageNamed:@"bg1"] forState:UIControlStateNormal];        [btn setBackgroundImage:[UIImage imageNamed:@"bg2"] forState:UIControlStateSelected];        [btn addTarget:self action:@selector(buttonClick:) forControlEvents:UIControlEventTouchUpInside];        if (i==0) {            btn.selected = YES;        }        [self addSubview:btn];    }        //把中心按钮永远放在父视图最上层    [self bringSubviewToFront:button];        }//所有button的点击事件-(void)buttonClick:(UIButton *)button{        if (button.tag==300) {                if (button.selected == NO) {            [UIView animateWithDuration:0.3 animations:^{                button.center = self.btnCenter;            }];            [UIView animateWithDuration:1 animations:^{                for (int i=0; i<7; i++) {                    UIButton *btn = (UIButton *)[self viewWithTag:i+100];                    CGFloat x = self.R * cosf(self.angle * i) +self.btnCenter.x;                    CGFloat y = self.R * sinf(self.angle * i) + self.btnCenter.y;                    btn.center = CGPointMake(x ,y);                    btn.alpha = 1;                }            }];        }else{            [UIView animateWithDuration:1 animations:^{                for (int i=0; i<7; i++) {                    UIButton *btn = (UIButton *)[self viewWithTag:i+100];                    btn.center = self.btnCenter;                    btn.alpha = 0;                }            }];            //[self startTimer];        }        button.selected = !button.selected;    }else if (button.tag>=100&&button.tag<107){        button.selected = YES;        [self selectChangedWithTag:button.tag];                //        [self selectDataWithNumber:button.tag-100.0];    }}//点击按钮后，上一个按钮改变状态-(void)selectChangedWithTag:(NSInteger)tag{    for (int i=100; i<107; i++) {        if (i==tag) {                    }else{            UIButton *button = (UIButton *)[self viewWithTag:i];            button.selected = NO;        }    }}//根据点击按钮的不同，进行不同的操作-(void)selectDataWithNumber:(int)index{        NSLog(@"%d", index);}

 GWRoundView *roundView = [[GWRoundView alloc] initWithFrame:CGRectMake(0, 20, self.view.frame.size.width, self.view.frame.size.width)];    [self.view addSubview:roundView];