自定义pageControl

-(void) setCurrentPage:(NSInteger)page

{

[super setCurrentPage:page];

[self updateDots];

}

-(instancetype)initWithFrame:(CGRect)frame

{

if (self ==[super initWithFrame:frame]) {

activeImage = [UIImage imageNamed:@"SWIPE_ICON_CLICK"];

inactiveImage = [UIImage imageNamed:@"SWIPE_ICON_UNCLICK"];

}

return self;

}

-(void) updateDots

{

for (int i = 0; i < [self.subviews count]; i++){

UIImageView * dot = [self imageViewForSubview: [self.subviews objectAtIndex: i]];

if (i == self.currentPage) dot.image = activeImage;

else dot.image = inactiveImage;

}

}

- (UIImageView *) imageViewForSubview: (UIView *) view

{

UIImageView * dot = nil;

if ([view isKindOfClass: [UIView class]])

{

for (UIView* subview in view.subviews)

{

if ([subview isKindOfClass:[UIImageView class]])

{

dot = (UIImageView *)subview;

break;

}

}

if (dot == nil)

{

dot = [[UIImageView alloc] initWithFrame:CGRectMake(0.0f, 0.0f, view.frame.size.width, view.frame.size.height)];

[view addSubview:dot];

}

}

else

{

dot = (UIImageView *) view;

}

return dot;

}