UIPageControll - 图片格式

设置pageCon的显示风格:

• 1. 颜色

 page.pageIndicatorTintColor = [UIColor redColor];
 page.currentPageIndicatorTintColor = [UIColor greenColor];

• 2. 平铺图片

 page.currentPageIndicatorTintColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"dot_selected"]];
 page.pageIndicatorTintColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"dot_normal"]];

• 3. 修改属性

 [page setValue:[UIImage imageNamed:@"compose_keyboard_dot_normal"] forKeyPath:@"pageImage"];
 [page setValue:[UIImage imageNamed:@"compose_keyboard_dot_selected"] forKeyPath:@"currentPageImage"];