iOS9 3D Touch 使用第二篇

作者: Lonely__M | 来源:发表于2015-11-12 16:08 被阅读2510次

    前一篇文章介绍了给图片添加快捷方式,这篇主要介绍应用内,3D Touch的peek和pop功能的实现

    • 当前的ViewController实现UIViewControllerPreviewingDelegate,实现代理方法- (UIViewController *)previewingContext:(id<UIViewControllerPreviewing>)previewingContext viewControllerForLocation:(CGPoint)location

    • 注册当前的viewController

    
    
    /** 注册当前view */
    [self registerForPreviewingWithDelegate:self sourceView:self.view];
    

    代码如下:

    
    
    #import "ViewController.h"
    #import "DetailViewController.h"
    
    @interface ViewController ()<UITableViewDataSource,UITableViewDelegate>
    {
        UITableView *mainTable;
    }
    
    @end
    
    @implementation ViewController
    
    - (void)viewDidLoad {
        [super viewDidLoad];
        // Do any additional setup after loading the view, typically from a nib.
        
        self.view.backgroundColor = [UIColor whiteColor];
        self.title = @"首页";
        
        if (self.traitCollection.forceTouchCapability == UIForceTouchCapabilityAvailable)
        {
            UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"您的手机支持3dtouch" message:nil delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil, nil];
            [alert show];
            
             /** 注册当前view */
            [self registerForPreviewingWithDelegate:self sourceView:self.view];
        }
        else
        {
            UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"很遗憾您的手机不支持3dtouch" message:nil delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil, nil];
            [alert show];
        }
        
        mainTable = [[UITableView alloc] initWithFrame:self.view.bounds style:UITableViewStyleGrouped];
        mainTable.delegate = self;
        mainTable.dataSource = self;
        [self.view addSubview:mainTable];
        
    }
    
    - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
    {
        return 1;
    }
    
    - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
    {
        return 10;
    }
    
    - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
    {
        NSString *cellId = [NSString stringWithFormat:@"%ld--%ld",(long)indexPath.section,(long)indexPath.row];
        UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellId];
        if (!cell)
        {
            cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellId];
        }
        
        cell.textLabel.text = cellId;
        
        return cell;
    }
    
    - (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
    {
        return 45.0f;
    }
    
    - (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section
    {
        return 15.0f;
    }
    
    - (CGFloat)tableView:(UITableView *)tableView heightForFooterInSection:(NSInteger)section
    {
        return 0.1f;
    }
    
    - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
    {
        [tableView deselectRowAtIndexPath:indexPath animated:YES];
    }
    
    #pragma mark -  previewing Delegate
    - (UIViewController *)previewingContext:(id<UIViewControllerPreviewing>)previewingContext viewControllerForLocation:(CGPoint)location
    {
         /** 转换坐标 */
        CGPoint p = [mainTable convertPoint:location fromView:self.view];
        
         /** 通过坐标活的当前cell indexPath */
        NSIndexPath *indexPath = [mainTable indexPathForRowAtPoint:p];
        
         /** 获得当前cell */
        UITableViewCell *cell = [mainTable cellForRowAtIndexPath:indexPath];
        
        DetailViewController *detail = [[DetailViewController alloc] init];
    //    detail.preferredContentSize = CGSizeMake(0, 120);
        detail.view.frame = self.view.frame;
        
        detail.titleString = cell.textLabel.text;
        
        if (indexPath.row > 6)
        {
            return nil;
        }
        
        return detail;
    }
    
    - (void)previewingContext:(id<UIViewControllerPreviewing>)previewingContext commitViewController:(UIViewController *)viewControllerToCommit
    {
        [self showViewController:viewControllerToCommit sender:self];
    }
    
    - (void)didReceiveMemoryWarning {
        [super didReceiveMemoryWarning];
        // Dispose of any resources that can be recreated.
    }
    
    @end
    
    • 预览时滑动底部菜单添加,在要展示的ViewController中(本例为DemoViewController)实现 UIViewControllerPreviewingDelegate的协议
      重写方法代理方法- (NSArray<id<UIPreviewActionItem>> *)previewActionItems;

    代码如下:

    
    @interface DetailViewController ()
    
    @end
    
    @implementation DetailViewController
    
    - (void)viewDidLoad {
        [super viewDidLoad];
        // Do any additional setup after loading the view.
        
        self.view.backgroundColor = [UIColor lightGrayColor];
        
    }
    
    - (void)viewWillAppear:(BOOL)animated
    {
        [super viewWillAppear:animated];
        
        NSLog(@"title  %@",self.titleString);
        
        self.navigationItem.title = self.titleString;
    }
    
    底部预览界面选项
    -(NSArray<id<UIPreviewActionItem>> *)previewActionItems
    {
        UIPreviewAction *p1 = [UIPreviewAction actionWithTitle:@"选项1" style:UIPreviewActionStyleDefault handler:^(UIPreviewAction * _Nonnull action, UIViewController * _Nonnull previewViewController) {
            NSLog(@"1111111");
            
            UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"" message:@"111111" delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil, nil];
            [alert show];
        }];
        
        
        UIPreviewAction *p2 = [UIPreviewAction actionWithTitle:@"选项2" style:UIPreviewActionStyleSelected handler:^(UIPreviewAction * _Nonnull action, UIViewController * _Nonnull previewViewController) {
            NSLog(@"2222222222");
        }];
        
        
        UIPreviewAction *p3 = [UIPreviewAction actionWithTitle:@"选项3" style:UIPreviewActionStyleDestructive handler:^(UIPreviewAction * _Nonnull action, UIViewController * _Nonnull previewViewController) {
            NSLog(@"3333333333");
            
        }];
        
        return @[p1,p2,p3];
    }
    
    - (void)didReceiveMemoryWarning {
        [super didReceiveMemoryWarning];
        // Dispose of any resources that can be recreated.
    }
    

    通过以上代码,就可实现3D touch peek和pop的效果

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