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Abeansits/UIScrollView+Extensions.h

Created January 8, 2014 14:27
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  1. Abeansits created this gist Jan 8, 2014.
    14 changes: 14 additions & 0 deletions UIScrollView+Extensions.h
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    //
    // UIScrollView+Extensions.h
    //
    //

    @interface UIScrollView (Extensions)

    /// Returns true if the content has been scrolled all the way to the top (by pulling the content up).
    - (BOOL)isScrolledToTop;

    /// Returns true if the content has been scrolled all the way to the bottom (by pulling the content down).
    - (BOOL)isScrolledToBottom;

    @end
    32 changes: 32 additions & 0 deletions UIScrollView+Extensions.m
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    //
    // UIScrollView+Extensions.m
    //
    //

    #import "UIScrollView+Extensions.h"

    @implementation UIScrollView (Extensions)


    - (BOOL)isScrolledToTop {
    return (self.contentOffset.y <= [self verticalOffsetToTop]);
    }

    - (BOOL)isScrolledToBottom {
    return (self.contentOffset.y >= [self verticalOffsetToBottom]);
    }


    #pragma mark - Utils

    - (CGFloat)verticalOffsetToTop {
    CGFloat verticalOffsetTop = self.contentInset.top;
    return -verticalOffsetTop;
    }

    - (CGFloat)verticalOffsetToBottom {
    CGFloat verticalOffsetBottom = (self.contentSize.height + self.contentInset.bottom - self.bounds.size.height);
    return verticalOffsetBottom;
    }

    @end