创建控件继承于UIPageControl 然后再.m文件重写方法：
//重写方法 改变点点的大小
- (void) setCurrentPage:(NSInteger)page
{
[super setCurrentPage:page];
self.backgroundColor = [UIColor clearColor];
for (NSUInteger subviewIndex = 0; subviewIndex < [self.subviews count]; subviewIndex++)
{
UIImageView* subview = [self.subviews objectAtIndex:subviewIndex];
if (subviewIndex == page)
{
subview.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"img_dangqian"]];
CGSize size;
size.height = 5;
size.width = 5;
[subview setFrame:CGRectMake(subview.frame.origin.x,
subview.frame.origin.x,
size.width,
size.height)];
}
else
{
CGSize size;
size.height = 5;
size.width = 5;
[subview setFrame:CGRectMake(subview.frame.origin.x,
subview.frame.origin.x,
size.width,
size.height)];
subview.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"img_qita"]];
}
}
}
