UIScrollView+Scrollabitily.h

//
//  UIScrollView+Scrollabitily.h
//
//  Created by FukuyamaShingo on 9/4/14.
//  Copyright (c) 2014 FukuyamaShingo. All rights reserved.
//

#import <UIKit/UIKit.h>

@interface UIScrollView (Scrollabitily)

@property (nonatomic, assign, readonly) BOOL canScrollToTop;
@property (nonatomic, assign, readonly) BOOL canScrollToBottom;
@property (nonatomic, assign, readonly) BOOL canScrollToLeft;
@property (nonatomic, assign, readonly) BOOL canScrollToRight;

- (BOOL)canScrollWithPlayTop:(CGFloat)play;
- (BOOL)canScrollWithPlayBottom:(CGFloat)play;
- (BOOL)canScrollWithPlayLeft:(CGFloat)play;
- (BOOL)canScrollWithPlayRight:(CGFloat)play;

- (void)stopScrolling;
- (void)stopScrollingAnimated:(BOOL)animated;

@end

UIScrollView+Scrollabitily.m

//
//  UIScrollView+Scrollabitily.m
//
//  Created by FukuyamaShingo on 9/4/14.
//  Copyright (c) 2014 FukuyamaShingo. All rights reserved.
//

#import "UIScrollView+Scrollabitily.h"

@implementation UIScrollView (Scrollabitily)

#pragma mark - Check scrollability
- (BOOL)canScrollToTop
{
    return self.contentOffset.y > 0;
}

- (BOOL)canScrollToBottom
{
    CGFloat maxHeight = self.contentSize.height;
    return (self.contentOffset.y + self.frame.size.height) < maxHeight;
}

- (BOOL)canScrollToLeft
{
    return self.contentOffset.x > 0;
}

- (BOOL)canScrollToRight
{
    CGFloat maxWidth = self.contentSize.width;
    return (self.contentOffset.x + self.frame.size.width) < maxWidth;
}

- (BOOL)canScrollWithPlayTop:(CGFloat)play
{
    return self.contentOffset.y > play;
}

- (BOOL)canScrollWithPlayBottom:(CGFloat)play
{
    CGFloat maxHeight = self.contentSize.height;
    return (self.contentOffset.y + self.frame.size.height) < (maxHeight - play);
}

- (BOOL)canScrollWithPlayLeft:(CGFloat)play
{
    return self.contentOffset.x > play;
}

- (BOOL)canScrollWithPlayRight:(CGFloat)play
{
    CGFloat maxWidth = self.contentSize.width;
    return (self.contentOffset.x + self.frame.size.width) < (maxWidth - play);
}

#pragma mark - Affect scrolling
- (void)stopScrolling
{
    [self stopScrollingAnimated:NO];
}

- (void)stopScrollingAnimated:(BOOL)animated
{
    [self setContentOffset:self.contentOffset animated:animated];
}


@end