ios7 UIPageControl变化

最新推荐文章于 2024-06-19 00:10:20 发布

转载最新推荐文章于 2024-06-19 00:10:20 发布 · 1.2k 阅读

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#ios7 #pagecontrol

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本文介绍如何在iOS 7及以下版本中自定义UIPageControl的样式，通过修改其子视图来实现不同状态下的点状指示器显示效果。

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原文：http://www.cnblogs.com/jiangshiyong/p/3334856.html

ios6 以前subviews是UIImageView ,到了ios7下就变成了UIView

先说下ios7之前那些点点的实现非常简单就是UIPageControl.subviews 就是一个个点的UIImageView 所以只需简单的替换掉就好了代码如下：

- (void)updateDots
{
 
    for (int i = 0; i< [self.subviews count]; i++) {
        UIImageView* dot =[self.subviews objectAtIndex:i];
 
        if (i == self.currentPage) {
            if ([dot respondsToSelector:@selector(setImage:)]) {
                dot.image=_activeImage;
            }
 
        } else {
            if ([dot respondsToSelector:@selector(setImage:)]) {
                dot.image=_inactiveImage;
            }
        }
    }
}
 
- (void)setCurrentPage:(NSInteger)currentPage
{
    [super setCurrentPage:currentPage];
    if ([[[UIDevice currentDevice]systemVersion]floatValue] <=6.0) {
        [self updateDots];
    }
//    [self updateDots];
    [self setNeedsDisplay];
}
- (void)setNumberOfPages:(NSInteger)numberOfPages
{
    [super setNumberOfPages:numberOfPages];
    if ([[[UIDevice currentDevice]systemVersion]floatValue] <=6.0) {
        [self updateDots];
    }
//    [self updateDots];
    [self setNeedsDisplay];
 
}
-(void)drawRect:(CGRect)iRect
{
    if ([kIphoneVersionfloatValue]>=7.0){//加个判断
    int i;
    CGRect rect;
 
    UIImage *image;
    iRect = self.bounds;
 
    if ( self.opaque ) {
        [self.backgroundColor set];
        UIRectFill( iRect );
    }
 
    if ( self.hidesForSinglePage && self.numberOfPages == 1 ) return;
 
    rect.size.height = _activeImage.size.height;
    rect.size.width = self.numberOfPages * _activeImage.size.width + ( self.numberOfPages - 1 ) * _kSpacing;
    rect.origin.x = floorf( ( iRect.size.width - rect.size.width ) / 2.0 );
    rect.origin.y = floorf( ( iRect.size.height - rect.size.height ) / 2.0 );
    rect.size.width = _activeImage.size.width;
 
    for ( i = 0; i < self.numberOfPages; ++i ) {
        image = i == self.currentPage ? _activeImage : _inactiveImage;
 
        [image drawInRect: rect];
 
        rect.origin.x += _activeImage.size.width + _kSpacing;
    }
    }else {

    }

}