重写pageControl更改滑动点的样式

#import <UIKit/UIKit.h>


@interface YS_PageControl : UIPageControl
@end
//////////////////////////////////

#import "YS_PageControl.h"


@implementation YS_PageControl

//@synthesize activeImage;
//@synthesize inactiveImage;

- (id)initWithFrame:(CGRect)frame {
    
    self = [super initWithFrame:frame];
    if (self) {
    }
    return self;
}

-(void) updateDots //通过便利子视图的数组更改选中或未选中的图片
{
    for (int i = 0; i < [self.subviews count]; i++)
    {
        UIImageView *dot = [self.subviews objectAtIndex:i];//需要学习的东西
        CGPoint cen = dot.center;
        dot.frame = CGRectMake(0, 0, 7, 7);
        if (i == self.currentPage) { 
            dot.image = [UIImage imageNamed:@"绿点.png"];
        }
        else{
            dot.image = [UIImage imageNamed:@"黑点.png"];
        }
        dot.center = cen;
    }
}

-(void) setCurrentPage:(NSInteger)page  //重写pageControl的currentPage
{
    [super setCurrentPage:page];
    [self updateDots];
}

- (void)dealloc {
    [super dealloc];
}


@end