SJSegmentedViewController-ObjC code

SJSegmentedScrollView-ObjC/SJContentView.h

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+//
+//  SJContentView.h
+//  Hike
+//
+//  Created by Pavan Goyal on 02/05/18.
+//  Copyright © 2018 Hike Pvt. Ltd. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+#import "SJSegmentTab.h"
+
+@interface SJContentView : UIScrollView
+
+@property (nonatomic, copy)   DidSelectSegmentAtIndex didSelectSegmentAtIndex;
+
+- (void)addContentView:(UIView *)view frame:(CGRect)frame;
+- (void)updateContentControllersFrame:(CGRect)frame;
+- (void)movePageToIndex:(NSInteger)index animated:(BOOL)animated;
+
+@end

SJSegmentedScrollView-ObjC/SJContentView.m

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+//
+//  SJContentView.m
+//  Hike
+//
+//  Created by Pavan Goyal on 02/05/18.
+//  Copyright © 2018 Hike Pvt. Ltd. All rights reserved.
+//
+
+#import "SJContentView.h"
+
+@interface SJContentView () <UIScrollViewDelegate>
+
+@property (nonatomic, assign) NSInteger pageIndex;
+@property (nonatomic, strong) NSMutableArray<UIView *> *contentViews;
+@property (nonatomic, strong) UIView *contentView;
+@property (nonatomic, strong) NSLayoutConstraint *contentViewWidthConstraint;
+@property (nonatomic, strong) NSMutableArray<NSLayoutConstraint *> *contentSubViewWidthConstraints;
+@property (nonatomic, assign) CGFloat animationDuration;
+
+@end
+
+@implementation SJContentView
+
+- (instancetype)initWithFrame:(CGRect)frame {
+    self = [super initWithFrame:frame];
+    if (self) {
+        _pageIndex = 0;
+        _contentViews = [[NSMutableArray alloc] init];
+        _animationDuration = 0.3;
+        _contentSubViewWidthConstraints = [[NSMutableArray alloc] init];
+        self.delegate = self;
+        [self setPagingEnabled:YES];
+        self.contentView = [[UIView alloc] init];
+        self.contentView.translatesAutoresizingMaskIntoConstraints = NO;
+        [self addSubview:self.contentView];
+        NSArray<NSLayoutConstraint *> *horizontalConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"H:|[contentView]|" options:0 metrics:nil views:@{@"contentView": self.contentView, @"mainView": self}];
+        [self addConstraints:horizontalConstraints];
+        self.contentViewWidthConstraint = [NSLayoutConstraint constraintWithItem:self.contentView attribute:NSLayoutAttributeWidth relatedBy:NSLayoutRelationEqual toItem:nil attribute:NSLayoutAttributeNotAnAttribute multiplier:1.0 constant:0];
+        [self addConstraint:self.contentViewWidthConstraint];
+        NSArray<NSLayoutConstraint *> *verticalConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"V:|[contentView(==mainView)]|" options:0 metrics:nil views:@{@"contentView": self.contentView, @"mainView": self}];
+        [self addConstraints:verticalConstraints];
+    }
+    return self;
+}
+
+- (void)addContentView:(UIView *)view frame:(CGRect)frame {
+    view.translatesAutoresizingMaskIntoConstraints = NO;
+    [self.contentView addSubview:view];
+    CGFloat width = frame.size.width;
+    if (self.contentViews.count > 0) {
+        UIView *previousView = self.contentViews.lastObject;
+        NSArray<NSLayoutConstraint *> *horizontalConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"H:[previousView]-0-[view]" options:0 metrics:@{@"xPos": @(self.contentViews.count * width)} views:@{@"view": view, @"previousView": previousView}];
+        [self.contentView addConstraints:horizontalConstraints];
+    } else {
+        NSArray<NSLayoutConstraint *> *horizontalConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"H:|[view]" options:0 metrics:@{@"xPos": @(self.contentViews.count * width)} views:@{@"view": view}];
+        [self.contentView addConstraints:horizontalConstraints];
+    }
+    NSLayoutConstraint *widthConstraint = [NSLayoutConstraint constraintWithItem:view attribute:NSLayoutAttributeWidth relatedBy:NSLayoutRelationEqual toItem:nil attribute:NSLayoutAttributeNotAnAttribute multiplier:1.0 constant:width];
+    [self.contentView addConstraint:widthConstraint];
+    [self.contentSubViewWidthConstraints addObject:widthConstraint];
+    NSArray<NSLayoutConstraint *> *verticalConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"V:|-0-[view]-0-|" options:0 metrics:nil views:@{@"view": view}];
+    [self.contentView addConstraints:verticalConstraints];
+    [self.contentViews addObject:view];
+    self.contentViewWidthConstraint.constant = self.contentViews.count * self.bounds.size.width;
+}
+
+- (void)updateContentControllersFrame:(CGRect)frame {
+    CGFloat width = frame.size.width;
+    self.contentViewWidthConstraint.constant = self.contentViews.count * width;
+    for (NSLayoutConstraint *constraint in self.contentSubViewWidthConstraints) {
+        constraint.constant = width;
+    }
+    [self layoutIfNeeded];
+    CGPoint point = self.contentOffset;
+    point.x = self.pageIndex * width;
+    [self setContentOffset:point animated:YES];
+}
+
+- (void)movePageToIndex:(NSInteger)index animated:(BOOL)animated {
+    self.pageIndex = index;
+    CGPoint point = CGPointMake((index * self.bounds.size.width), 0);
+    if (animated) {
+        [UIView animateWithDuration:self.animationDuration animations:^{
+            self.contentOffset = point;
+        }];
+    } else {
+        self.contentOffset = point;
+    }
+}
+
+- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView {
+    self.pageIndex = self.contentOffset.x / self.bounds.size.width;
+    if (self.didSelectSegmentAtIndex) {
+        self.didSelectSegmentAtIndex(nil, self.pageIndex, YES);
+    }
+    [[NSNotificationCenter defaultCenter] postNotificationName:@"DidChangeSegmentIndex" object:@(self.pageIndex)];
+}
+
+@end

SJSegmentedScrollView-ObjC/SJSegmentTab.h

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+//
+//  SJSegmentTab.h
+//  Hike
+//
+//  Created by Pavan Goyal on 30/04/18.
+//  Copyright © 2018 Hike Pvt. Ltd. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+#import <Foundation/Foundation.h>
+
+@class SJSegmentTab;
+
+typedef void (^DidSelectSegmentAtIndex)(SJSegmentTab *segmentTab, NSInteger index, BOOL animated);
+
+@interface SJSegmentTab : UIView
+
+@property (nonatomic, assign) BOOL isSelected;
+@property (nonatomic, copy) DidSelectSegmentAtIndex didSelectSegmentAtIndex;
+
+- (instancetype)initWithTitle:(NSString *)title;
+- (instancetype)initWithView:(UIView *)view;
+- (void)setTitle:(NSString *)title;
+- (void)titleColor:(UIColor *)color;
+- (void)titleFont:(UIFont *)font;
+- (void)addConstraintsToView:(UIView *)view;
+
+@end

SJSegmentedScrollView-ObjC/SJSegmentTab.m

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+//
+//  SJSegmentTab.m
+//  Hike
+//
+//  Created by Pavan Goyal on 30/04/18.
+//  Copyright © 2018 Hike Pvt. Ltd. All rights reserved.
+//
+
+#import "SJSegmentTab.h"
+
+@interface SJSegmentTab ()
+
+@property(nonatomic, strong) UIButton *button;
+
+@end
+
+@implementation SJSegmentTab
+
+- (instancetype)initWithTitle:(NSString *)title {
+    self = [self initWithFrame:CGRectZero];
+    [self setTitle:title];
+    return self;
+}
+
+- (instancetype)initWithView:(UIView *)view {
+    self = [self initWithFrame:CGRectZero];
+    [self insertSubview:view atIndex:0];
+    [view removeConstraints:view.constraints];
+    [self addConstraintsToView:view];
+    return self;
+}
+
+- (instancetype)initWithFrame:(CGRect)frame {
+    self = [super initWithFrame:frame];
+    if (self) {
+        self.translatesAutoresizingMaskIntoConstraints = NO;
+        self.button = [UIButton buttonWithType:UIButtonTypeCustom];
+        self.button.frame = self.bounds;
+        [self.button setSelected:NO];
+        [self.button addTarget:self action:@selector(onSegmentButtonPress:) forControlEvents:UIControlEventTouchUpInside];
+        [self addSubview:self.button];
+        [self addConstraintsToView:self.button];
+    }
+    return self;
+}
+
+- (void)addConstraintsToView:(UIView *)view {
+    view.translatesAutoresizingMaskIntoConstraints = NO;
+    NSArray<NSLayoutConstraint *> *verticalConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"V:|[view]|" options:0 metrics:nil views:@{@"view": view}];
+    NSArray<NSLayoutConstraint *> *horizontalConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"H:|[view]|" options:0 metrics:nil views:@{@"view": view}];
+    [self addConstraints:verticalConstraints];
+    [self addConstraints:horizontalConstraints];
+}
+
+- (void)setTitle:(NSString *)title {
+    [self.button setTitle:title forState:UIControlStateNormal];
+}
+
+- (void)titleColor:(UIColor *)color {
+    [self.button setTitleColor:color forState:UIControlStateNormal];
+}
+
+- (void)titleFont:(UIFont *)font {
+    self.button.titleLabel.font = font;
+}
+
+- (void)setIsSelected:(BOOL)isSelected {
+    [self.button setSelected:isSelected];
+}
+
+- (void)onSegmentButtonPress:(id)sender {
+    NSInteger index = self.tag - 100;
+    [[NSNotificationCenter defaultCenter] postNotificationName:@"DidChangeSegmentIndex" object:@(index)];
+    if (self.didSelectSegmentAtIndex) {
+        self.didSelectSegmentAtIndex(self, index, YES);
+    }
+}
+
+@end

SJSegmentedScrollView-ObjC/SJSegmentView.h

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+//
+//  SJSegmentView.h
+//  Hike
+//
+//  Created by Pavan Goyal on 02/05/18.
+//  Copyright © 2018 Hike Pvt. Ltd. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+#import "SJSegmentTab.h"
+#import "SJContentView.h"
+
+@interface SJSegmentView : UIScrollView
+
+@property (nonatomic, strong) NSMutableArray<SJSegmentTab *> *segments;
+@property (nonatomic, strong) UIFont *font;
+@property (nonatomic, assign) CGFloat selectedSegmentViewHeight;
+@property (nonatomic, assign) NSInteger kSegmentViewTagOffset;
+@property (nonatomic, assign) CGFloat segmentViewOffsetWidth;
+@property (nonatomic, strong) UIView *segmentContentView;
+@property (nonatomic, copy) DidSelectSegmentAtIndex didSelectSegmentAtIndex;
+@property (nonatomic, strong) UIView *selectedSegmentView;
+@property (nonatomic, strong) NSLayoutConstraint *xPosConstraints;
+@property (nonatomic, strong) NSLayoutConstraint *contentViewWidthConstraint;
+@property (nonatomic, strong) NSLayoutConstraint *selectedSegmentViewWidthConstraint;
+@property (nonatomic, strong) NSMutableArray<NSLayoutConstraint *> *contentSubViewWidthConstraints;
+@property (nonatomic, strong) NSArray<UIViewController *> *controllers;
+@property (nonatomic, assign) CGFloat segmentViewHeight;
+@property (nonatomic, strong) UIColor *selectedSegmentViewColor;
+@property (nonatomic, strong) UIColor *titleColor;
+@property (nonatomic, strong) UIColor *segmentBackgroundColor;
+@property (nonatomic, strong) SJContentView *contentView;
+
+- (void)didChangeParentViewFrame:(CGRect)frame;
+- (void)setSegmentsView:(CGRect)frame;
+
+@end