自定义PageControl样式

#define iOS7 ([[UIDevice currentDevice].systemVersion doubleValue] >= 7.0)
//调用方法  改变PageControl样式
[self changePageControlImage:self.detailPageControl];
//改变pagecontrol中圆点样式
- (void)changePageControlImage:(UIPageControl *)pageControl{
    static UIImage *currentImage = nil;
    static UIImage *otherImage = nil;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        currentImage = [UIImage imageNamed:@"dot"];
        otherImage = [UIImage imageNamed:@"dotk"];
    });
    if (iOS7) {
        [pageControl setValue:currentImage forKey:@"_currentPageImage"];
        [pageControl setValue:otherImage forKey:@"_pageImage"];
    } else {
        for (int i = 0;i < self.thubmImageArray.count; i++) {
            UIImageView *imageVieW = [pageControl.subviews objectAtIndex:i];
            imageVieW.frame = CGRectMake(imageVieW.frame.origin.x, imageVieW.frame.origin.y, 20, 20);
            imageVieW.image = pageControl.currentPage == i ? currentImage : otherImage;
        }
    }
}
dotk@2x.png
dot@2x.png