貓貓學iOS 之微博項目實戰(7)程序啟動新特性用UICollectionViewController實現
阿新 • • 發佈:2017-07-05
num warning art asc enter 部分 setimage 版本號 back
貓貓分享。必須精品
原創文章。歡迎轉載。轉載請註明:翟乃玉的博客
地址:http://blog.csdn.net/u013357243
一:效果
這裏實現了大多數app都會有的軟件新特性的功能,用的是UICollectionViewController實現的
二:思路
這裏用了UICollectionViewController實現,就是做一個沒有間隙,每一個cell都是一個屏幕的UICollectionViewController,自己定義的。
然後把以下的UIPageControl 還有最後一頁的開始以及分享button放入就OK了。
調用的時候。首先獲取當前的app的版本號號。然後再獲取上一個版本號。
進行兩個版本號的比較。
當前版本號和上一個版本號不同。當前版本號是從infoDictionary中拿到的,上一個版本號是從自己存的NSUserDefaults 中的NYVersionKey拿到的,而且蘋果同意上傳小於當前版本號的app。假設是第一個版本號時候。上一個版本號還沒有值,也會不同。
依據結果設置window的不同根控制器。
自己定義UICollectionViewController步驟:
要註意:
1.初始化的時候設置布局參數
2.collertionView必須註冊cell
3.自己定義cell
三:代碼
調用部分代碼:AppDelegate
//1,獲取當前的版本號號
NSString *currentVersion = [NSBundle mainBundle].infoDictionary[@"CFBundleVersion"];
//2。獲取上一次的版本號號
NSString *lastVersion = [[NSUserDefaults standardUserDefaults]objectForKey:NYVersionKey];
NYLog(@"currentVersion == %@ , lastVersion == %@ ",currentVersion, lastVersion);
//推斷是否有新的版本號
if ([currentVersion isEqualToString:lastVersion]) {
//假設沒有新的版本號(當前版本號和上一個版本號不同,當前版本號是從infoDictionary中拿到的,上一個版本號是從自己存的NSUserDefaults 中的NYVersionKey拿到的,而且蘋果同意上傳小於當前版本號的app,假設是第一個版本號時候,上一個版本號還沒有值,也會不同。)
//創建tabBarVC
NYTabBarController *tabBarVC = [[NYTabBarController alloc]init];
//設置窗體跟控制器
self.window.rootViewController = tabBarVC;
}else{//假設有新的版本號
//進入新特性界面
NYNewFeatureController *newFeatureVC = [[NYNewFeatureController alloc]init];
newFeatureVC.view.backgroundColor = [UIColor redColor];
self.window.rootViewController = newFeatureVC;
//用偏好設置,保存當前版本號。
[[NSUserDefaults standardUserDefaults]setObject:currentVersion forKey:NYVersionKey];
}
自己定義的collectionViewController
NYNewFeatureController.m
//
// NYNewFeatureController.m
// 貓貓微博
//
// 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];
//註冊cell。默認就會創建這個類型的cell
[self.collectionView registerClass:[NYNewFeatureCell class] forCellWithReuseIdentifier:reuseIdentifier];
//分頁
self.collectionView.pagingEnabled = YES;
//取消彈簧效果
self.collectionView.bounces = NO;
//不顯示滾動欄
self.collectionView.showsHorizontalScrollIndicator = NO;
// 加入pageController
[self setUpPageControl];
// Do any additional setup after loading the view.
}
// 加入pageController
- (void)setUpPageControl
{
// 加入pageController,僅僅須要設置位置。不須要管理尺寸
UIPageControl *control = [[UIPageControl alloc] init];
control.numberOfPages = 4;
control.pageIndicatorTintColor = [UIColor blackColor];
control.currentPageIndicatorTintColor = [UIColor redColor];
// 設置center
control.center = CGPointMake(self.view.width * 0.5, self.view.height);
_control = control;
[self.view addSubview:control];
}
/*使用UICollectionViewController要註意:
1.初始化的時候設置布局參數
2.collertionView必須註冊cell
3.自己定義cell
*/
-(instancetype)init
{
//
UICollectionViewFlowLayout *layout = [[UICollectionViewFlowLayout alloc]init];
//設置cell的尺寸
layout.itemSize = [UIScreen mainScreen].bounds.size;
//清空cell間隔的行距
layout.minimumLineSpacing = 0;
//設置cell的滑動方向
layout.scrollDirection = UICollectionViewScrollDirectionHorizontal;
return [super initWithCollectionViewLayout:layout];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#pragma mark - UICollectionView代理和數據源
- (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView {
return 1;
}
- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section {
return 4;
}
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {
// dequeueReusableCellWithReuseIdentifier
// 1.首先從緩存池裏取cell
// 2.看下當前是否有註冊Cell,假設註冊了cell,就會幫你創建cell
// 3.沒有註冊,報錯
NYNewFeatureCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:reuseIdentifier forIndexPath:indexPath];
// 拼接圖片名稱 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
// 僅僅要一滾動就會調用
- (void)scrollViewDidScroll:(UIScrollView *)scrollView
{
// 獲取當前的偏移量,計算當前第幾頁
int page = scrollView.contentOffset.x / scrollView.bounds.size.width + 0.5;
// 設置頁數
_control.currentPage = page;
}
@end
自己定義的cell
NYNewFeatureCell.h
//
// NYNewFeatureCell.h
// 貓貓微博
//
// 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;
// 推斷是否是最後一頁
- (void)setIndexPath:(NSIndexPath *)indexPath count:(int)count;
@end
NYNewFeatureCell.m
//
// NYNewFeatureCell.m
// 貓貓微博
//
// 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button
@property (nonatomic, weak) UIButton *shareButton;
//開始button
@property (nonatomic, weak) UIButton *startButton;
@end
@implementation NYNewFeatureCell
//分享button懶載入
- (UIButton *)shareButton
{
if (_shareButton == nil) {
UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
[btn setTitle:@"分享給大家" 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;
}
//開始button懶載入
- (UIButton *)startButton
{
if (_startButton == nil) {
UIButton *startBtn = [UIButton buttonWithType:UIButtonTypeCustom];
[startBtn setTitle:@"開始微博" 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;
// 註意:一定要載入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button
self.shareButton.center = CGPointMake(self.width * 0.5, self.height * 0.8);
// 開始button
self.startButton.center = CGPointMake(self.width * 0.5, self.height * 0.9);
}
-(void)setImage:(UIImage *)image
{
_image = image;
self.imageView.image = image;
}
// 推斷當前cell是否是最後一頁
-(void)setIndexPath:(NSIndexPath *)indexPath count:(int)count
{
if (indexPath.row == count - 1) { // 最後一頁,顯示分享和開始button
self.shareButton.hidden = NO;
self.startButton.hidden = NO;
}else{ // 非最後一頁,隱藏分享和開始button
self.shareButton.hidden = YES;
self.startButton.hidden = YES;
}
}
// 點擊開始微博的時候調用
- (void)start
{
// 進入tabBarVc
NYTabBarController *tabBarVc = [[NYTabBarController alloc] init];
// 切換根控制器:能夠直接把之前的根控制器清空
NYKeyWindow.rootViewController = tabBarVc;
}
@end
貓貓學iOS 之微博項目實戰(7)程序啟動新特性用UICollectionViewController實現