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https://gitlab.opencode.de/bwi/bundesmessenger/clients/bundesmessenger-ios.git
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dummy implementation of the segmentedViewController :
> the tar items are displayed (even if they are currently hardcoded) > the tab items can selected (the selected marker view is displayed)
This commit is contained in:
yannick
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/*
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Copyright 2015 OpenMarket Ltd
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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#import "SegmentedViewController.h"
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@interface SegmentedViewController ()
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{
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// list of displayed UIViewControllers
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NSArray* viewControllers;
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// list of NSString
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NSArray* sectionTitles;
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// list of section labels
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NSArray* sectionLabels;
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// the selected marker view
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UIView* selectedMarkerView;
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NSLayoutConstraint *leftMarkerViewConstraint;
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// the index of the viewcontroller displayed at first load
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NSUInteger selectedIndex;
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// the UI item color
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UIColor *greenVectorColor;
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}
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@end
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@implementation SegmentedViewController
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#pragma mark - Class methods
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+ (UINib *)nib
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{
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return [UINib nibWithNibName:NSStringFromClass([SegmentedViewController class])
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bundle:[NSBundle bundleForClass:[SegmentedViewController class]]];
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}
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+ (instancetype)segmentedViewController
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{
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return [[[self class] alloc] initWithNibName:NSStringFromClass([SegmentedViewController class])
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bundle:[NSBundle bundleForClass:[SegmentedViewController class]]];
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}
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/**
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init the segmentedViewController with a list of UIViewControllers.
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@param titles the section tiles
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@param viewControllers the list of viewControllers to display.
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@param defaultSelected index of the default selected UIViewController in the list.
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*/
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- (void)initWithTitles:(NSArray*)titles viewControllers:(NSArray*)someViewControllers defaultSelected:(NSUInteger)index
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{
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viewControllers = someViewControllers;
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sectionTitles = titles;
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selectedIndex = index;
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}
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#pragma mark -
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- (void)addConstraint:(UIView*)view constraint:(NSLayoutConstraint*)aConstraint
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{
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if ([NSLayoutConstraint respondsToSelector:@selector(activateConstraints:)])
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{
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[NSLayoutConstraint activateConstraints:@[aConstraint]];
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}
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else
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{
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[view addConstraint:aConstraint];
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}
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}
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- (void)removeConstraint:(UIView*)view constraint:(NSLayoutConstraint*)aConstraint
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{
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if ([NSLayoutConstraint respondsToSelector:@selector(deactivateConstraints:)])
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{
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[NSLayoutConstraint deactivateConstraints:@[aConstraint]];
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}
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else
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{
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[view removeConstraint:aConstraint];
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}
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}
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- (void)viewDidLoad
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{
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[super viewDidLoad];
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selectedIndex = 1;
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// Adjust Top
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[self removeConstraint:self.view constraint:self.selectionContainerTopConstraint];
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// it is not possible to define a constraint to the topLayoutGuide in the xib editor
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// so do it in the code ..
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self.selectionContainerTopConstraint = [NSLayoutConstraint constraintWithItem:self.topLayoutGuide
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attribute:NSLayoutAttributeBottom
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relatedBy:NSLayoutRelationEqual
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toItem:self.selectionContainer
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attribute:NSLayoutAttributeTop
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multiplier:1.0f
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constant:0.0f];
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[self addConstraint:self.selectionContainer constraint:self.selectionContainerTopConstraint];
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// TODO : it should be an application constant value
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greenVectorColor = [UIColor colorWithRed:(98.0/256.0) green:(206.0/256.0) blue:(156.0/256.0) alpha:1.0];
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[self createSegmentedViews];
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}
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- (void)createSegmentedViews
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{
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NSMutableArray* labels = [[NSMutableArray alloc] init];
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int count = 4;
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for(int index = 0; index < count; index++)
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{
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// create programmatically each label
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UILabel *label = [[UILabel alloc] init];
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label.text = label.text = [NSString stringWithFormat:@"toto %d", index];
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label.textAlignment = NSTextAlignmentCenter;
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label.textColor = greenVectorColor;
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label.backgroundColor = [UIColor clearColor];
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// the constraint defines the label frame
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// so ignore any autolayout stuff
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[label setTranslatesAutoresizingMaskIntoConstraints:NO];
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// add the label before setting the constraints
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[self.selectionContainer addSubview:label];
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NSLayoutConstraint *leftConstraint;
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if (labels.count)
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{
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leftConstraint = [NSLayoutConstraint constraintWithItem:label
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attribute:NSLayoutAttributeLeading
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relatedBy:NSLayoutRelationEqual
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toItem:[labels objectAtIndex:(index-1)]
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attribute:NSLayoutAttributeTrailing
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multiplier:1.0
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constant:0];
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}
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else
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{
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leftConstraint = [NSLayoutConstraint constraintWithItem:label
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attribute:NSLayoutAttributeLeading
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relatedBy:NSLayoutRelationEqual
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toItem:self.selectionContainer
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attribute:NSLayoutAttributeLeading
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multiplier:1.0
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constant:0];
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}
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NSLayoutConstraint *rightConstraint = [NSLayoutConstraint constraintWithItem:label
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attribute:NSLayoutAttributeWidth
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relatedBy:NSLayoutRelationEqual
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toItem:self.selectionContainer
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attribute:NSLayoutAttributeWidth
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multiplier:1.0 / count
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constant:0];
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NSLayoutConstraint *topConstraint = [NSLayoutConstraint constraintWithItem:label
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attribute:NSLayoutAttributeTop
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relatedBy:NSLayoutRelationEqual
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toItem:self.selectionContainer
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attribute:NSLayoutAttributeTop
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multiplier:1.0
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constant:0];
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NSLayoutConstraint *heightConstraint = [NSLayoutConstraint constraintWithItem:label
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attribute:NSLayoutAttributeHeight
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relatedBy:NSLayoutRelationEqual
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toItem:self.selectionContainer
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attribute:NSLayoutAttributeHeight
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multiplier:1.0
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constant:0];
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// set the constraints
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if ([NSLayoutConstraint respondsToSelector:@selector(activateConstraints:)])
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{
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[NSLayoutConstraint activateConstraints:@[leftConstraint, rightConstraint, topConstraint, heightConstraint]];
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}
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else
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{
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[self.selectionContainer addConstraint:leftConstraint];
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[self.selectionContainer addConstraint:rightConstraint];
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[self.selectionContainer addConstraint:topConstraint];
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[label addConstraint:heightConstraint];
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}
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UITapGestureRecognizer *labelTapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(onLabelTouch:)];
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[labelTapGesture setNumberOfTouchesRequired:1];
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[labelTapGesture setNumberOfTapsRequired:1];
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label.userInteractionEnabled = YES;
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[label addGestureRecognizer:labelTapGesture];
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[labels addObject:label];
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}
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sectionLabels = labels;
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[self addSelectedMarkerView];
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[self displaySelectedViewController];
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}
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- (void)addSelectedMarkerView
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{
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// create the selected marker view
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selectedMarkerView = [[UIView alloc] init];
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selectedMarkerView.backgroundColor = greenVectorColor;
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[selectedMarkerView setTranslatesAutoresizingMaskIntoConstraints:NO];
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[self.selectionContainer addSubview:selectedMarkerView];
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leftMarkerViewConstraint = [NSLayoutConstraint constraintWithItem:selectedMarkerView
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attribute:NSLayoutAttributeLeading
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relatedBy:NSLayoutRelationEqual
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toItem:[sectionLabels objectAtIndex:selectedIndex]
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attribute:NSLayoutAttributeLeading
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multiplier:1.0
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constant:0];
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NSLayoutConstraint *widthConstraint = [NSLayoutConstraint constraintWithItem:selectedMarkerView
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attribute:NSLayoutAttributeWidth
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relatedBy:NSLayoutRelationEqual
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toItem:self.selectionContainer
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attribute:NSLayoutAttributeWidth
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multiplier:1.0 / sectionLabels.count
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constant:0];
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NSLayoutConstraint *bottomConstraint = [NSLayoutConstraint constraintWithItem:selectedMarkerView
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attribute:NSLayoutAttributeBottom
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relatedBy:NSLayoutRelationEqual
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toItem:self.selectionContainer
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attribute:NSLayoutAttributeBottom
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multiplier:1.0
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constant:0];
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NSLayoutConstraint *heightConstraint = [NSLayoutConstraint constraintWithItem:selectedMarkerView
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attribute:NSLayoutAttributeHeight
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relatedBy:NSLayoutRelationEqual
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toItem:nil
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attribute:NSLayoutAttributeNotAnAttribute
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multiplier:1.0
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constant:3];
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// set the constraints
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if ([NSLayoutConstraint respondsToSelector:@selector(activateConstraints:)])
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{
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[NSLayoutConstraint activateConstraints:@[leftMarkerViewConstraint, widthConstraint, bottomConstraint, heightConstraint]];
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}
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else
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{
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[self.selectionContainer addConstraint:leftMarkerViewConstraint];
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[self.selectionContainer addConstraint:bottomConstraint];
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[selectedMarkerView addConstraint:heightConstraint];
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[selectedMarkerView addConstraint:heightConstraint];
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}
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}
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- (void)displaySelectedViewController
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{
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/*
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- (void) displayContentController: (UIViewController*) content;
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{
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[self addChildViewController:content];
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content.view.frame = [self frameForContentController];
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[self.view addSubview:self.currentClientView];
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[content didMoveToParentViewController:self];
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}*/
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}
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#pragma mark - touch event
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- (void)onLabelTouch:(UIGestureRecognizer*)gestureRecognizer
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{
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NSUInteger pos = [sectionLabels indexOfObject:gestureRecognizer.view];
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// check if there is an update before triggering anything
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if ((pos != NSNotFound) && (selectedIndex != pos))
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{
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// update the selected index
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selectedIndex = pos;
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// update the marker view position
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[self removeConstraint:selectedMarkerView constraint:leftMarkerViewConstraint];
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leftMarkerViewConstraint = [NSLayoutConstraint constraintWithItem:selectedMarkerView
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attribute:NSLayoutAttributeLeading
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relatedBy:NSLayoutRelationEqual
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toItem:[sectionLabels objectAtIndex:selectedIndex]
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attribute:NSLayoutAttributeLeading
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multiplier:1.0
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constant:0];
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[self addConstraint:selectedMarkerView constraint:leftMarkerViewConstraint];
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[self displaySelectedViewController];
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}
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}
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@end
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