iOS.分层架构设计.02.基于同一工程的分层(支持iPad)

1、案例介绍

2、工程结构

3、Main_iPad.storyboard

4、代码

Layered02DetailViewController.h

#import <UIKit/UIKit.h>
#import "Layered02NoteBL.h"
@class Layered02DetailViewController;

@interface Layered02ViewController : UITableViewController

@property (nonatomic,strong) NSMutableArray *listData;

@property (nonatomic,strong) Layered02DetailViewController *detailViewController;

@end

Layered02DetailViewController.m

#import "Layered02ViewController.h"
#import "Layered02DetailViewController.h"

@interface Layered02ViewController ()

@end

@implementation Layered02ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    
    // 1、初始化数据
    Layered02NoteBL *noteBL = [[Layered02NoteBL alloc] init];
    self.listData = [noteBL findAll];
    
    // 2、当点击save按钮时，发出刷新表表格的通知
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(reloadView:)
                                                 name:@"reloadViewNotification"
                                               object:nil];
    
    self.navigationItem.leftBarButtonItem = self.editButtonItem;
    
    // 3、for iPad 指向detailView,以便修改备忘录的内容
    self.detailViewController = (Layered02DetailViewController *)[[self.splitViewController.viewControllers lastObject] topViewController];
    
    // 4、for iPad 默认备忘录的内容为第一个
    if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPad) {
        
        if (self.listData.count == 0) {
            
            self.detailViewController.detailDescriptionLabel.text = @"";
        }else{
            self.detailViewController.detailItem = self.listData[0];
        }
    }
    
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
}

#pragma mark - 处理通知
-(void)reloadView:(NSNotification*)notification
{
    NSMutableArray *resList = [notification object];
    self.listData  = resList;
    [self.tableView reloadData];
}

#pragma mark table dataSource
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return self.listData.count;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    // 1、初始化重用Cell
    static NSString *reUseCell = @"reUseCell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:reUseCell];
    if (cell == nil) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:reUseCell];
    }
    
    // 2、配置重用Cell数据
    Layered02Note *note = [self.listData objectAtIndex:indexPath.row];
    cell.textLabel.text = note.content;
    cell.detailTextLabel.text = [note.date description];
    return cell;
}

#pragma mark 设置备忘录内容
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    if ([[segue identifier] isEqualToString:@"showDetail"]) {
        NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];
        Layered02Note  *note = self.listData[indexPath.row];
        [[segue destinationViewController] setDetailItem:note];
    }
}

#pragma mark table delegate
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath
{
    return YES;
}

- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
    if (editingStyle == UITableViewCellEditingStyleDelete) {
        
        Layered02Note *note = [self.listData objectAtIndex:[indexPath row]];
        Layered02NoteBL *bl = [[Layered02NoteBL alloc] init];
        self.listData = [bl remove: note];
        
        // for iPad
        if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPad) {
            if (self.listData.count == 0) {
                
                self.detailViewController.detailDescriptionLabel.text = @"";
            }else{
                self.detailViewController.detailItem = self.listData[0];
            }
        }
        
        [tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationFade];
        
    } else if (editingStyle == UITableViewCellEditingStyleInsert) {
        
    }
}

// for iPad
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPad) {
        Layered02Note  *note = self.listData[indexPath.row];
        self.detailViewController.detailItem = note;
    }
}

@end

Layered02DetailViewController.h

#import <UIKit/UIKit.h>
#import "Layered02Note.h"
#import "Layered02AddViewController.h"

@interface Layered02DetailViewController : UIViewController<UISplitViewControllerDelegate>

@property (nonatomic,strong) id detailItem;

@property (nonatomic,weak) IBOutlet UILabel *detailDescriptionLabel;

@end

Layered02DetailViewController.m

#import "Layered02DetailViewController.h"


@interface Layered02DetailViewController ()
// for iPad
@property (strong, nonatomic) UIPopoverController *masterPopoverController;
@end

@implementation Layered02DetailViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    
    [self configureView];
    
    // for iPad
    if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPad) {
        UIBarButtonItem *addButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(insertNewObject:)];
        self.navigationItem.rightBarButtonItem = addButton;
    }
}

// for iPad
- (void)insertNewObject:(id)sender
{
    
    Layered02AddViewController *modalViewController = [self.storyboard
        instantiateViewControllerWithIdentifier:@"addViewController"];
    
    modalViewController.modalTransitionStyle = UIModalTransitionStyleCoverVertical;
    modalViewController.modalPresentationStyle = UIModalPresentationFormSheet;
    [self presentViewController:modalViewController animated:YES completion:nil];
    
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
}

#pragma mark Managing the detail item
-(void)configureView
{
    if (self.detailItem) {
        Layered02Note *note = self.detailItem;
        self.detailDescriptionLabel.text = note.content;
    }
}
// for iPad
- (void)awakeFromNib{
    [super awakeFromNib];
    if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPad) {
        self.splitViewController.delegate = self;
    }
}
#pragma mark - Split view
// for iPad
- (void)splitViewController:(UISplitViewController *)splitController willHideViewController:(UIViewController *)viewController withBarButtonItem:(UIBarButtonItem *)barButtonItem forPopoverController:(UIPopoverController *)popoverController
{
    barButtonItem.title = NSLocalizedString(@"Master", @"Master");
    [self.navigationItem setLeftBarButtonItem:barButtonItem animated:YES];
    self.masterPopoverController = popoverController;
}
// for iPad
- (void)splitViewController:(UISplitViewController *)splitController willShowViewController:(UIViewController *)viewController invalidatingBarButtonItem:(UIBarButtonItem *)barButtonItem
{
    [self.navigationItem setLeftBarButtonItem:nil animated:YES];
    self.masterPopoverController = nil;
}
// for iPad
- (void)setDetailItem:(id)newDetailItem
{
    if (_detailItem != newDetailItem) {
        _detailItem = newDetailItem;
        
        // Update the view.
        [self configureView];
    }
    
    if (self.masterPopoverController != nil) {
        [self.masterPopoverController dismissPopoverAnimated:YES];
    }
}
@end

Layered02AddViewController.h

#import <UIKit/UIKit.h>
#import "Layered02NoteBL.h"

@interface Layered02AddViewController : UIViewController<UITextFieldDelegate>

@property (nonatomic,weak) IBOutlet UITextView *txtView;
-(IBAction)onclickDone:(id)sender;
-(IBAction)onclickSave:(id)sender;

@end

Layered02AddViewController.m

#import "Layered02AddViewController.h"

@interface Layered02AddViewController ()

@end

@implementation Layered02AddViewController

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view.
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}







- (IBAction)onclickDone:(id)sender {
    [self dismissViewControllerAnimated:YES completion:nil];
}

- (IBAction)onclickSave:(id)sender {
    
    Layered02NoteBL *bl = [[Layered02NoteBL alloc] init];
    Layered02Note *note = [[Layered02Note alloc] init];
    note.date = [[NSDate alloc] init];
    note.content = self.txtView.text;
    NSMutableArray *reslist = [bl create: note];
    
    [[NSNotificationCenter defaultCenter] postNotificationName:@"reloadViewNotification" object:reslist userInfo:nil];
    [self.txtView resignFirstResponder];
    [self dismissViewControllerAnimated:YES completion:nil];
    
}


-(BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text
{
    if([text isEqualToString:@"
"]) {
        [textView resignFirstResponder];
        return NO;
    }
    return YES;
}


@end