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  • AJ学IOS 之微博项目实战(7)程序启动新特性用UICollectionViewController实现

    AJ分享,必须精品

    一:效果

    这里实现了大多数app都会有的软件新特性的功能,用的是UICollectionViewController实现的
    这里写图片描述

    二:思路

    这里用了UICollectionViewController实现,就是做一个没有间隙,每个cell都是一个屏幕的UICollectionViewController,自定义的。然后把下面的UIPageControl 还有最后一页的开始以及分享按钮放入就OK了。

    调用的时候,首先获取当前的app的版本号,然后再获取上一个版本。进行两个版本的比较。当前版本和上一个版本不同,当前版本是从infoDictionary中拿到的,上一个版本是从自己存的NSUserDefaults 中的NYVersionKey拿到的,并且苹果允许上传小于当前版本的app,如果是第一个版本时候,上一个版本还没有值,也会不同。
    根据结果设置window的不同根控制器。

    自定义UICollectionViewController步骤:
    要注意:
    1.初始化的时候设置布局参数
    2.collertionView必须注册cell
    3.自定义cell

    三:代码

    调用部分代码:AppDelegate

     //1,获取当前的版本号
        NSString *currentVersion = [NSBundle mainBundle].infoDictionary[@"CFBundleVersion"];
    
        //2,获取上一次的版本号
        NSString *lastVersion = [[NSUserDefaults standardUserDefaults]objectForKey:NYVersionKey];
    
    
        NYLog(@"currentVersion == %@ , lastVersion == %@ ",currentVersion, lastVersion);
        //判断是否有新的版本
        if ([currentVersion isEqualToString:lastVersion]) {
            //如果没有新的版本(当前版本和上一个版本不同,当前版本是从infoDictionary中拿到的,上一个版本是从自己存的NSUserDefaults 中的NYVersionKey拿到的,并且苹果允许上传小于当前版本的app,如果是第一个版本时候,上一个版本还没有值,也会不同。)
    
            //创建tabBarVC
            NYTabBarController *tabBarVC = [[NYTabBarController alloc]init];
    
            //设置窗口跟控制器
            self.window.rootViewController = tabBarVC;
        }else{//如果有新的版本
    
            //进入新特性界面
            NYNewFeatureController *newFeatureVC = [[NYNewFeatureController alloc]init];
    
            newFeatureVC.view.backgroundColor = [UIColor redColor];
    
            self.window.rootViewController = newFeatureVC;
    
    
            //用偏好设置,保存当前版本。
            [[NSUserDefaults standardUserDefaults]setObject:currentVersion forKey:NYVersionKey];
    
        }
    
    

    自定义的collectionViewController

    NYNewFeatureController.m

    //
    //  NYNewFeatureController.m
    
    //  Created by apple on 15-8-1.
    //  Copyright (c) 2015年 znycat. All rights reserved.
    //
    
    #import "NYNewFeatureController.h"
    #import "NYNewFeatureCell.h"
    
    
    @interface NYNewFeatureController ()
    
    @property (nonatomic, weak) UIPageControl *control;
    
    @end
    
    @implementation NYNewFeatureController
    
    static NSString * const reuseIdentifier = @"cell";
    
    - (void)viewDidLoad {
        [super viewDidLoad];
    
        //注册cell,默认就会创建这个类型的cell
        [self.collectionView registerClass:[NYNewFeatureCell class] forCellWithReuseIdentifier:reuseIdentifier];
    
        //分页
        self.collectionView.pagingEnabled = YES;
        //取消弹簧效果
        self.collectionView.bounces = NO;
        //不显示滚动条
        self.collectionView.showsHorizontalScrollIndicator = NO;
    
        // 添加pageController
        [self setUpPageControl];
        // Do any additional setup after loading the view.
    }
    // 添加pageController
    - (void)setUpPageControl
    {
        // 添加pageController,只需要设置位置,不需要管理尺寸
        UIPageControl *control = [[UIPageControl alloc] init];
    
        control.numberOfPages = 4;
        control.pageIndicatorTintColor = [UIColor blackColor];
        control.currentPageIndicatorTintColor = [UIColor redColor];
    
        // 设置center
        control.center = CGPointMake(self.view.width * 0.5, self.view.height);
        _control = control;
        [self.view addSubview:control];
    }
    
    /*使用UICollectionViewController要注意:
    1.初始化的时候设置布局参数
    2.collertionView必须注册cell
    3.自定义cell
    */
    
    -(instancetype)init
    {
    
        //
        UICollectionViewFlowLayout *layout = [[UICollectionViewFlowLayout alloc]init];
    
        //设置cell的尺寸
        layout.itemSize = [UIScreen mainScreen].bounds.size;
    
        //清空cell间隔的行距
        layout.minimumLineSpacing = 0;
    
        //设置cell的滑动方向 
        layout.scrollDirection = UICollectionViewScrollDirectionHorizontal;
    
        return [super initWithCollectionViewLayout:layout];
    }
    
    
    - (void)didReceiveMemoryWarning {
        [super didReceiveMemoryWarning];
        // Dispose of any resources that can be recreated.
    }
    
    #pragma mark - UICollectionView代理和数据源
    - (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView {
    
        return 1;
    }
    
    
    - (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section {
        return 4;
    }
    
    - (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {
        // dequeueReusableCellWithReuseIdentifier
        // 1.首先从缓存池里取cell
        // 2.看下当前是否有注册Cell,如果注册了cell,就会帮你创建cell
        // 3.没有注册,报错
    
        NYNewFeatureCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:reuseIdentifier forIndexPath:indexPath];
    
    
        // 拼接图片名称 3.5 320 480
        CGFloat screenH = [UIScreen mainScreen].bounds.size.height;
        NSString *imageName = [NSString stringWithFormat:@"new_feature_%ld",indexPath.row + 1];
        if (screenH > 480) { // 5 , 6 , 6 plus
            imageName = [NSString stringWithFormat:@"new_feature_%ld-568h",indexPath.row + 1];
        }
    
        cell.image = [UIImage imageNamed:imageName];
    
        [cell setIndexPath:indexPath count:4];
    
        return cell;
    }
    #pragma mark - UIScrollView代理
    // 只要一滚动就会调用
    - (void)scrollViewDidScroll:(UIScrollView *)scrollView
    {
        // 获取当前的偏移量,计算当前第几页
        int page = scrollView.contentOffset.x / scrollView.bounds.size.width + 0.5;
    
        // 设置页数
        _control.currentPage = page;
    }
    
    
    @end
    

    自定义的cell

    NYNewFeatureCell.h

    //
    //  NYNewFeatureCell.h
    
    //  Created by apple on 15-8-1.
    //  Copyright (c) 2015年 znycat. All rights reserved.
    //
    
    #import <UIKit/UIKit.h>
    
    @interface NYNewFeatureCell : UICollectionViewCell
    
    @property (nonatomic, strong) UIImage *image;
    
    
    // 判断是否是最后一页
    - (void)setIndexPath:(NSIndexPath *)indexPath count:(int)count;
    
    @end
    

    NYNewFeatureCell.m

    //
    //  NYNewFeatureCell.m
    
    //  Created by apple on 15-8-1.
    //  Copyright (c) 2015年 znycat. All rights reserved.
    //
    
    #import "NYNewFeatureCell.h"
    #import "NYTabBarController.h"
    
    @interface NYNewFeatureCell()
    
    @property (nonatomic, weak) UIImageView *imageView;
    //分享按钮
    @property (nonatomic, weak) UIButton *shareButton;
    //开始按钮
    @property (nonatomic, weak) UIButton *startButton;
    @end
    
    
    @implementation NYNewFeatureCell
    
    //分享按钮懒加载
    - (UIButton *)shareButton
    {
        if (_shareButton == nil) {
    
            UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
            [btn setTitle:@"分享给大家" forState:UIControlStateNormal];
            [btn setImage:[UIImage imageNamed:@"new_feature_share_false"] forState:UIControlStateNormal];
            [btn setImage:[UIImage imageNamed:@"new_feature_share_true"] forState:UIControlStateSelected];
            [btn setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
            [btn sizeToFit];
    
            [self.contentView addSubview:btn];
    
            _shareButton = btn;
    
        }
        return _shareButton;
    }
    
    //开始按钮懒加载
    - (UIButton *)startButton
    {
        if (_startButton == nil) {
            UIButton *startBtn = [UIButton buttonWithType:UIButtonTypeCustom];
            [startBtn setTitle:@"开始微博" forState:UIControlStateNormal];
            [startBtn setBackgroundImage:[UIImage imageNamed:@"new_feature_finish_button"] forState:UIControlStateNormal];
            [startBtn setBackgroundImage:[UIImage imageNamed:@"new_feature_finish_button_highlighted"] forState:UIControlStateHighlighted];
            [startBtn sizeToFit];
            [startBtn addTarget:self action:@selector(start) forControlEvents:UIControlEventTouchUpInside];
            [self addSubview:startBtn];
            _startButton = startBtn;
    
        }
        return _startButton;
    }
    
    -(UIImageView *)imageView
    {
        if (_imageView == nil) {
            UIImageView *imageV = [[UIImageView alloc]init];
    
            _imageView = imageV;
    
            // 注意:一定要加载contentView
            [self.contentView addSubview:imageV];
        }
        return _imageView;
    }
    
    // 布局子控件的frame
    -(void)layoutSubviews
    {
        [super layoutSubviews];
    
        self.imageView.frame = self.bounds;
    
        // 分享按钮
        self.shareButton.center = CGPointMake(self.width * 0.5, self.height * 0.8);
    
    
        // 开始按钮
        self.startButton.center = CGPointMake(self.width * 0.5, self.height * 0.9);
    }
    
    -(void)setImage:(UIImage *)image
    {
        _image = image;
        self.imageView.image = image;
    }
    
    // 判断当前cell是否是最后一页
    -(void)setIndexPath:(NSIndexPath *)indexPath count:(int)count
    {
        if (indexPath.row == count - 1) { // 最后一页,显示分享和开始按钮
            self.shareButton.hidden = NO;
            self.startButton.hidden = NO;
    
        }else{ // 非最后一页,隐藏分享和开始按钮
            self.shareButton.hidden = YES;
            self.startButton.hidden = YES;
    
        }
    }
    
    // 点击开始微博的时候调用
    - (void)start
    {
        // 进入tabBarVc
        NYTabBarController *tabBarVc = [[NYTabBarController alloc] init];
    
        // 切换根控制器:可以直接把之前的根控制器清空
        NYKeyWindow.rootViewController = tabBarVc;
    
    }
    @end
    
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  • 原文地址:https://www.cnblogs.com/luolianxi/p/4990301.html
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