- Fix
- upgrade Pods
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//
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// MMCPSScrollView.h
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// MMCPSScrollView
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//
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// Created by Martin on 02-04-13.
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// Copyright (c) 2013 Martin Metselaar. All rights reserved.
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//
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#import <UIKit/UIKit.h>
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typedef enum {
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MMCPSScrollHorizontal,
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MMCPSScrollVertical
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} MMCPSScrollType;
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@class MMCPSScrollView;
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@protocol MMCPSScrollViewDelegate <NSObject>
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- (void) scrollView:(MMCPSScrollView *) scrollView willScrollToPage:(NSUInteger) pageIndex;
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- (void) scrollView:(MMCPSScrollView *) scrollView didScrollToPage:(NSUInteger) pageIndex;
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@end
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@interface MMCPSScrollView : UIScrollView <UIScrollViewDelegate> {
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MMCPSScrollType _type;
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CGPoint _endScrollingPoint;
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CGPoint _startDraggingPoint;
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NSInteger _pageToScrollToo;
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CGRect _bottomComponent;
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}
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// The height of one segment
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@property (nonatomic) NSInteger segmentSize;
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// The number of segments that represent one page
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@property (nonatomic) NSInteger pageSize;
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@property (nonatomic) MMCPSScrollType type;
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// Set to true if you want it to fit the screen.
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// Set to false if you want to have white space.
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@property (nonatomic, assign) BOOL enableFitScreen;
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// Time it takes to scroll to next page
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@property (nonatomic) CGFloat scrollingTime;
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@property (nonatomic) NSUInteger currentPage;
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@property (nonatomic, retain) id<MMCPSScrollViewDelegate> MMCPSDelegate;
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- (id)initWithFrame:(CGRect)frame andType:(MMCPSScrollType) type;
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@end
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+321
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//
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// MMCPSScrollView.m
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// MMCPSScrollView
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//
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// Created by Martin on 02-04-13.
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// Copyright (c) 2013 Martin Metselaar. All rights reserved.
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//
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#import "MMCPSScrollView.h"
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@implementation MMCPSScrollView
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@synthesize type = _type;
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- (id)initWithFrame:(CGRect)frame
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{
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self = [self initWithFrame:frame andType:MMCPSScrollVertical];
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if (self) {
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self.backgroundColor = [UIColor whiteColor];
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}
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return self;
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}
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- (id)initWithFrame:(CGRect)frame andType:(MMCPSScrollType) type
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{
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self = [super initWithFrame:frame];
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if (self) {
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_segmentSize = [self CGRectSize:frame];
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_pageSize = 1;
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_type = type;
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_scrollingTime = 0.35f;
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_bottomComponent = CGRectZero;
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_endScrollingPoint = CGPointZero;
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self.showsHorizontalScrollIndicator = NO;
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self.showsVerticalScrollIndicator = NO;
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self.delegate = self;
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}
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return self;
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}
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#pragma mark - ScrollView Position Helpers
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// These functions are for getting the right value for the calculations to make horizontal and vertical scrolling possible
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- (CGFloat) CGPoint:(CGPoint) point {
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if (_type == MMCPSScrollVertical)
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return point.y;
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else
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return point.x;
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}
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- (CGFloat) contentScrollOffset:(UIScrollView *) scrollView {
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if (_type == MMCPSScrollVertical)
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return scrollView.contentOffset.y;
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else
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return scrollView.contentOffset.x;
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}
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- (CGFloat) contentScrollSize:(UIScrollView *) scrollView {
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if (_type == MMCPSScrollVertical)
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return scrollView.contentSize.height;
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else
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return scrollView.contentSize.width;
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}
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- (CGFloat) contentSize:(CGSize) size {
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if (_type == MMCPSScrollVertical)
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return size.height;
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else
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return size.width;
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}
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- (CGFloat) contentSizeReversed:(CGSize) size {
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if (_type == MMCPSScrollVertical)
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return size.width;
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else
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return size.height;
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}
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- (CGFloat) frameSize:(UIView *) view {
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return [self CGRectSize:view.frame];
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}
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- (CGFloat) frameOrigin:(UIView *) view {
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return [self CGRectOrigin:view.frame];
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}
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- (CGFloat) CGRectOrigin:(CGRect) rect {
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if (_type == MMCPSScrollVertical)
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return rect.origin.y;
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else
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return rect.origin.x;
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}
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- (CGFloat) CGRectSize:(CGRect) rect {
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if (_type == MMCPSScrollVertical)
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return rect.size.height;
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else
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return rect.size.width;
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}
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- (CGSize) setCGSize:(CGSize) size withValue:(CGFloat) value {
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if (_type == MMCPSScrollVertical)
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size.height = value;
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else
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size.width = value;
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return size;
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}
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- (CGSize) CGSizeMake:(CGFloat) value1 and:(CGFloat) value2 {
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if (_type == MMCPSScrollVertical)
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return CGSizeMake(value1, value2);
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else
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return CGSizeMake(value2, value1);
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}
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#pragma mark - Custom ScrollView Helpers
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- (BOOL) isScrollViewBouncing:(UIScrollView *) scrollView {
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if ([self contentScrollOffset:scrollView] < 0)
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return YES;
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if ([self contentScrollOffset:scrollView] > ([self contentScrollSize:scrollView] - [self frameSize:scrollView]))
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return YES;
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return NO;
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}
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#pragma mark - Scroll to pages
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- (void) scrollToPage:(NSInteger) index {
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[self scrollToPage:index withHeight:_segmentSize];
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}
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- (void) scrollToPage:(NSInteger) index withHeight:(NSInteger) height {
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[self scrollToPage:index withHeight:_segmentSize andSize:_pageSize];
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}
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- (void) scrollToPage:(NSInteger) index withHeight:(NSInteger) height andSize:(NSInteger) size {
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_currentPage = index + 1;
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// height is the height/width for one segment
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// index is the index of the page
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// size is the number of segments that present one page
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int value = height * index * size;
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// check if the page where the user wants so scroll to is in the contentSize of the ScrollView
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if (!(value + [self frameSize:self] < [self contentScrollSize:self])) {
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value = [self contentScrollSize:self] - [self frameSize:self];
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}
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[self setContentScrollOffset:value];
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if ([_MMCPSDelegate respondsToSelector:@selector(scrollView:willScrollToPage:)])
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[_MMCPSDelegate scrollView:self willScrollToPage:_currentPage];
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}
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- (void)setContentScrollOffset:(CGFloat) value {
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CGPoint contentOffset = CGPointZero;
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if (_type == MMCPSScrollVertical)
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contentOffset = CGPointMake(0, value);
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else
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contentOffset = CGPointMake(value, 0);
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[UIView animateWithDuration:_scrollingTime delay:0.0f options:UIViewAnimationOptionCurveEaseOut
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animations:^{ [self setContentOffset:contentOffset animated:NO]; }
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completion:^(BOOL finished){
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if (finished) {
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if ([_MMCPSDelegate respondsToSelector:@selector(scrollView:didScrollToPage:)])
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[_MMCPSDelegate scrollView:self didScrollToPage:_currentPage];
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}
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}];
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}
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// Scroll forward multiple pages
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- (void) scrollPagesForward:(NSInteger) value {
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for (int i = 0; i < value; i++) {
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_pageToScrollToo++;
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}
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[self scrollToPage:_pageToScrollToo];
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}
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// Scroll back multiple pages
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- (void) scrollPagesBack:(NSInteger) value {
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value++;
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for (int i = 0; i < value; i++) {
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_pageToScrollToo--;
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}
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[self scrollToPage:_pageToScrollToo];
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}
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// Scroll to next page
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- (void) scrollToNextPage {
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_pageToScrollToo++;
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[self scrollToPage:_pageToScrollToo];
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}
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// Scroll to previous page
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- (void) scrollToPreviousPage {
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if (!_pageToScrollToo <= 0) {
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_pageToScrollToo--;
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} else
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_pageToScrollToo = 0;
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[self scrollToPage:_pageToScrollToo];
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}
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#pragma mark - UIScrollViewDelegate
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- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView {
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// Keep track when started dragging
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_startDraggingPoint = scrollView.contentOffset;
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}
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- (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate {
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// Check if the ScrollView is within his bounds
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if ([self isScrollViewBouncing:scrollView])
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return;
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// Check is any scrolling is needed.
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if ((int) [self contentScrollOffset:scrollView] % (_segmentSize * _pageSize ) != 0) {
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// If the user is not dragging the ScrollView anymore.
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if (!scrollView.isDragging) {
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int startPoint = [self CGPoint:_startDraggingPoint];
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float lengthScrolled = [self contentScrollOffset:scrollView] - startPoint;
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float numberOfSegments;
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if (lengthScrolled < 0.0f)
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numberOfSegments = floor(lengthScrolled / _segmentSize);
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else
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numberOfSegments = ceil(lengthScrolled / _segmentSize);
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int pagesToScroll;
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if (numberOfSegments < 0.0f)
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pagesToScroll = floor(numberOfSegments / _pageSize);
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else
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pagesToScroll = ceil(numberOfSegments / _pageSize);
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if (pagesToScroll < 0) {
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[self scrollPagesBack:abs(pagesToScroll + 1)];
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}else
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[self scrollPagesForward:pagesToScroll];
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return;
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}
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}
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// Content Offset where the user did end dragging
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_endScrollingPoint = scrollView.contentOffset;
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}
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- (void)scrollViewDidScroll:(UIScrollView *)scrollView {
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// Check if the scrollview is not bouncing.
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if ([self isScrollViewBouncing:scrollView])
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return;
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// If the _endScrollingPoint has been set then the user has been dragging the ScrollView.
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// So then we can determite what to do.
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if (!CGPointEqualToPoint(_endScrollingPoint, CGPointZero)) {
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int startPoint = [self CGPoint:_endScrollingPoint];
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_endScrollingPoint = CGPointZero;
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if (startPoint < [self contentScrollOffset:scrollView]) {
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[self scrollToNextPage];
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} else {
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[self scrollToPreviousPage];
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}
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}
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}
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- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView {
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// When the scrolling is done decelerating then reset the _endScrollingPoint
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_endScrollingPoint = CGPointZero;
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}
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#pragma mark - UIView
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- (void)addSubview:(UIView *)view {
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[super addSubview:view];
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int currentLowestPoint = [self CGRectOrigin:_bottomComponent] + [self CGRectSize:_bottomComponent];
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int viewLowestPoint = [self frameOrigin:view] + [self frameSize:view];
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if (currentLowestPoint < viewLowestPoint) {
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// New lowest point
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_bottomComponent = view.frame;
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CGSize contentSize = [self CGSizeMake:[self contentSizeReversed:self.contentSize]
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and:[self frameOrigin:view] + [self frameSize:view]];
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// Check if the contentSize does not corresponds with the pages
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if (!_enableFitScreen && !((int)contentSize.height % (_pageSize * _segmentSize) == 0)) {
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// Calculate how much 'white space' is needed.
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int currentContentSize = [self contentSize:contentSize];
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int sizeOnePage = (_pageSize * _segmentSize);
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int canSomebodyPleaseRenameThisValueIfHeOrSheFindsOutHowToCallIt = ((int)[self contentSize:contentSize] % (_pageSize * _segmentSize));
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CGFloat value = sizeOnePage - canSomebodyPleaseRenameThisValueIfHeOrSheFindsOutHowToCallIt + currentContentSize;
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contentSize = [self setCGSize:contentSize withValue:value];
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}
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[self setContentSize:contentSize];
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}
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}
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@end
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