创建一个类，继承UIPageControl，重写setCurrentPage方法，可设置圆点大小

- (void) setCurrentPage:(NSInteger)page {

    [super setCurrentPage:page];

    for (NSUInteger subviewIndex = 0; subviewIndex < [self.subviews count]; subviewIndex++) {

        UIImageView* subview = [self.subviews objectAtIndex:subviewIndex];

        CGSize size;

        size.height = 10;

        size.width = 10;

        [subview setFrame:CGRectMake(subview.frame.origin.x, subview.frame.origin.y,

                                     size.width,size.height)];

    }

}

如果只改变当前选中的点的大小，前面加个判断就可以了：

- (void) setCurrentPage:(NSInteger)page {

    [super setCurrentPage:page];

    for (NSUInteger subviewIndex = 0; subviewIndex < [self.subviews count]; subviewIndex++) {

        if (subviewIndex == page)

        {

            UIImageView* subview = [self.subviews objectAtIndex:subviewIndex];

            CGSize size;

            size.height = 10;

            size.width = 10;

            [subview setFrame:CGRectMake(subview.frame.origin.x, subview.frame.origin.y,

                                         size.width,size.height)];

        }

    }

}

iOS 调整UIPageControl圆点大小