Note_Master-Detail Application(iOS template)_05_ YJYMasterViewController.m
// YJYMasterViewController.m
#import "YJYMasterViewController.h"
#import "YJYDetailViewController.h"
/*
@interface:接口,提供类的公共描述,接口里面包含了使用该类的所需信息,编译此部分后,就能够使用该的对象及调用类方法。
@implementation:实现,告诉编译器如何让该类工作,实现了接口中声明的方法。
代码分为接口和实现两部分,
接口部分包含:@interface指令、公共struct定义、enum常量、@defines和extern全局变量等。
实现部分包含:@implementation指令、全局变量的定义、私有struct等。
#import:导入头文件:头文件包含元素声明(如,结构体、符号常量、函数原型等),#import同c语言中的#include类似,它们的区别在于,在c语言中,通常使用#ifdef命令来避免一个头文件包含另一个文件,而#import可保证头文件只被包含一次。
带尖括号语句用来导入系统头文件(只读),带引号的语句用来导入项目本地头文件(可读)。
*/
@interface YJYMasterViewController ()
- (void)configureCell:(UITableViewCell *)cell atIndexPath:(NSIndexPath *)indexPath;
@end
@implementation YJYMasterViewController
/*
当.nib文件被加载的时候,会发送一个awakeFromNib的消息到.nib文件中的每个对象,每个对象都可以定义自己的 awakeFromNib函数来响应这个消息,
执行一些必要的操作。也就是说通过nib文件创建view对象是执行awakeFromNib
*/
- (void)awakeFromNib
{
self.clearsSelectionOnViewWillAppear = NO;
self.contentSizeForViewInPopover = CGSizeMake(320.0, 600.0);
[superawakeFromNib];
}
//当view对象被加载到内存是就会执行viewDidLoad,所以不管通过nib文件还是代码的方式创建对象都会执行viewDidLoad
- (void)viewDidLoad
{//释放视图资源
NSLog(@"viewDidLoad() begin...");
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
self.navigationItem.leftBarButtonItem = self.editButtonItem;
UIBarButtonItem *addButton = [[UIBarButtonItemalloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAddtarget:selfaction:@selector(insertNewObject:)];
self.navigationItem.rightBarButtonItem = addButton;
self.detailViewController = (YJYDetailViewController *)[[self.splitViewController.viewControllerslastObject] topViewController];
NSLog(@"viewDidLoad() over...");
}
- (void)didReceiveMemoryWarning
{
NSLog(@"didReceiveMemoryWarning() begin...over");
[superdidReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (void)insertNewObject:(id)sender
{
NSLog(@"insertNewObject() begin...");
NSManagedObjectContext *context = [self.fetchedResultsControllermanagedObjectContext];
NSEntityDescription *entity = [[self.fetchedResultsControllerfetchRequest] entity];
NSManagedObject *newManagedObject = [NSEntityDescriptioninsertNewObjectForEntityForName:[entity name] inManagedObjectContext:context];
// If appropriate, configure the new managed object.
// Normally you should use accessor methods, but using KVC here avoids the need to add a custom class to the template.
[newManagedObject setValue:[NSDate date] forKey:@"timeStamp"];
// Save the context.
NSError *error = nil;
if (![context save:&error]) {
// Replace this implementation with code to handle the error appropriately.
// abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
NSLog(@"Unresolved error %@, %@", error, [error userInfo]);
abort();
}
NSLog(@"insertNewObject() over...");
}
#pragma mark - Table View
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
NSLog(@"numberOfSectionsInTableView being...over");
return [[self.fetchedResultsControllersections] count];
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
NSLog(@"tableView numberOfRowsInSection() beging...");
id <NSFetchedResultsSectionInfo> sectionInfo = [self.fetchedResultsController sections][section];
NSLog(@"tableView numberOfRowsInSection() over...");
return [sectionInfo numberOfObjects];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
NSLog(@"tableView cellForRowAtIndexPath() beging...");
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"Cell"forIndexPath:indexPath];
[self configureCell:cell atIndexPath:indexPath];
NSLog(@"tableView cellForRowAtIndexPath() over...");
return cell;
}
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath
{//该方法控制master区的可编辑(删除)操作
// Return NO if you do not want the specified item to be editable.
return YES;
}
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
if (editingStyle == UITableViewCellEditingStyleDelete) {
NSManagedObjectContext *context = [self.fetchedResultsController managedObjectContext];
[context deleteObject:[self.fetchedResultsController objectAtIndexPath:indexPath]];
NSError *error = nil;
if (![context save:&error]) {
// Replace this implementation with code to handle the error appropriately.
// abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
NSLog(@"Unresolved error %@, %@", error, [error userInfo]);
abort();
}
}
}
- (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath
{
// The table view should not be re-orderable.
returnYES;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
NSManagedObject *object = [[self fetchedResultsController] objectAtIndexPath:indexPath];
self.detailViewController.detailItem = object;
}
#pragma mark - Fetched results controller
- (NSFetchedResultsController *)fetchedResultsController
{
if (_fetchedResultsController != nil) {
return_fetchedResultsController;
}
NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
// Edit the entity name as appropriate.
NSEntityDescription *entity = [NSEntityDescriptionentityForName:@"Event"inManagedObjectContext:self.managedObjectContext];
[fetchRequest setEntity:entity];
// Set the batch size to a suitable number.
[fetchRequest setFetchBatchSize:20];
// Edit the sort key as appropriate.
NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"timeStamp" ascending:NO];
NSArray *sortDescriptors = @[sortDescriptor];
[fetchRequest setSortDescriptors:sortDescriptors];
// Edit the section name key path and cache name if appropriate.
// nil for section name key path means "no sections".
NSFetchedResultsController *aFetchedResultsController = [[NSFetchedResultsControlleralloc] initWithFetchRequest:fetchRequest managedObjectContext:self.managedObjectContextsectionNameKeyPath:nilcacheName:@"Master"];
aFetchedResultsController.delegate = self;
self.fetchedResultsController = aFetchedResultsController;
NSError *error = nil;
if (![self.fetchedResultsControllerperformFetch:&error]) {
// Replace this implementation with code to handle the error appropriately.
// abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
NSLog(@"Unresolved error %@, %@", error, [error userInfo]);
abort();
}
return_fetchedResultsController;
}
- (void)controllerWillChangeContent:(NSFetchedResultsController *)controller
{
[self.tableViewbeginUpdates];
}
- (void)controller:(NSFetchedResultsController *)controller didChangeSection:(id <NSFetchedResultsSectionInfo>)sectionInfo
atIndex:(NSUInteger)sectionIndex forChangeType:(NSFetchedResultsChangeType)type
{
switch(type) {
caseNSFetchedResultsChangeInsert:
[self.tableViewinsertSections:[NSIndexSetindexSetWithIndex:sectionIndex] withRowAnimation:UITableViewRowAnimationFade];
break;
caseNSFetchedResultsChangeDelete:
[self.tableViewdeleteSections:[NSIndexSetindexSetWithIndex:sectionIndex] withRowAnimation:UITableViewRowAnimationFade];
break;
}
}
- (void)controller:(NSFetchedResultsController *)controller didChangeObject:(id)anObject
atIndexPath:(NSIndexPath *)indexPath forChangeType:(NSFetchedResultsChangeType)type
newIndexPath:(NSIndexPath *)newIndexPath
{
UITableView *tableView = self.tableView;
switch(type) {
caseNSFetchedResultsChangeInsert:
[tableView insertRowsAtIndexPaths:@[newIndexPath]withRowAnimation:UITableViewRowAnimationFade];
break;
caseNSFetchedResultsChangeDelete:
[tableView deleteRowsAtIndexPaths:@[indexPath]withRowAnimation:UITableViewRowAnimationFade];
break;
caseNSFetchedResultsChangeUpdate:
[self configureCell:[tableView cellForRowAtIndexPath:indexPath] atIndexPath:indexPath];
break;
caseNSFetchedResultsChangeMove:
[tableView deleteRowsAtIndexPaths:@[indexPath]withRowAnimation:UITableViewRowAnimationFade];
[tableView insertRowsAtIndexPaths:@[newIndexPath]withRowAnimation:UITableViewRowAnimationFade];
break;
}
}
- (void)controllerDidChangeContent:(NSFetchedResultsController *)controller
{
[self.tableViewendUpdates];
}
/*
// Implementing the above methods to update the table view in response to individual changes may have performance implications if a large number of changes are made simultaneously. If this proves to be an issue, you can instead just implement controllerDidChangeContent: which notifies the delegate that all section and object changes have been processed.
- (void)controllerDidChangeContent:(NSFetchedResultsController *)controller
{
// In the simplest, most efficient, case, reload the table view.
[self.tableView reloadData];
}
*/
- (void)configureCell:(UITableViewCell *)cell atIndexPath:(NSIndexPath *)indexPath
{
NSLog(@"configureCell atIndexPath() begin...");
NSManagedObject *object = [self.fetchedResultsController objectAtIndexPath:indexPath];
cell.textLabel.text = [[object valueForKey:@"timeStamp"] description];
NSLog(@"configureCell atIndexPath() over...");
}
@end
转载于:https://www.cnblogs.com/allearner/p/3623110.html
Note_Master-Detail Application(iOS template)_05_ YJYMasterViewController.m相关推荐
- beta应用程序ios_通过构建简单的食谱应用程序来了解iOS最佳做法
beta应用程序ios by Khoa Pham 通过Khoa Pham 通过构建简单的食谱应用程序来了解iOS最佳做法 (Learn iOS best practices by building a ...
- iOS 架构模式 - 简述 MVC, MVP, MVVM
Make everything as simple as possible, but not simpler - Albert Einstein,把每件事,做简单到极致,但又不过于简单 - 阿尔伯特· ...
- pages文件夹 AddCartSuccess Center Detail Home Login Pay PaySuccess
pages文件夹 AddCartSuccess <template><div class="cart-complete-wrap"><div clas ...
- ios swiftui_ios swiftui中的本地化
ios swiftui 本土化 (Localisation) Localisation is the process of making your app support another langua ...
- iOS系列教程之常见开发Tips(转自阿峰的博客)
开发技巧和常见错误汇总,不定期更新中,也欢迎大家总结跟帖 1:ARC下NSNotificationCenter需要remove - (void) dealloc { // [super dealloc ...
- android 高仿ios开关,Android自定义view仿IOS开关效果
本文主要讲解如何在 Android 下实现高仿 iOS 的开关按钮,并非是在 Android 自带的 ToggleButton 上修改,而是使用 API 提供的 onDraw.onMeasure.Ca ...
- 20.进入商品详情页Detail
like.vue组件中 给li添加一个点击事件 @click="goDetail" 对应的方法 methods:{goDetail(){this.$router.push({pat ...
- 【前端】Vue项目:旅游App-(22)detail:房屋信息、房屋设施、插槽
文章目录 目标 过程与代码 房屋信息部分info 相似结构的组件section 房屋设施facility 效果 总代码 修改或添加的文件 detail-section detail-facility ...
- XCode 4.2.1 项目的几个模版说明
XCode 4.2.1 项目的模版截图: Single View Application This template provides a starting point for an applicat ...
- IPhone 编程 XCode4.2 项目模板说明
2019独角兽企业重金招聘Python工程师标准>>> 入手了台Mac Mini 2010版,只有可怜的2G内存,由于经济问题,不敢随便升级到8G内存,只是升级到10.6.8,xco ...
最新文章
- 冲向大牛之安卓---2014.11月面试经常碰到的一些问题
- eclipse从数据库逆向生成Hibernate实体类
- Google AutoML最新技术解析:AutoML-Zero,从0构建模型
- 升级到VS.net 2008 sp1并安装卡巴斯基的兄弟们小心了
- 记录gulp报错The following tasks did not complete: cssmin或类似任务
- 你以为工厂模式很简单,可能是因为你懂的只是冰山的一角
- java exec source报错_Mac 下maven路径报错的坑
- Linux 命令(20)—— cat 命令
- 变分自编码器(VAE)
- 29 岁成为阿里巴巴 P8,工作前 5 年完成晋升 3 连跳,他如何做到?
- 神箭手云爬虫-爬取携程【国际】航班/机票信息-利用python解析返回的json文件将信息存储进Mysql数据库
- 基于multisim14的函数信号发生器仿真
- 什么是PR、什么是BD?
- python生成单位阵或者对角阵的三种方法
- 安装xmind之后,打开xmind文件报错
- PostgreSQL:不支持 10 验证类型
- Undistillable: Making A Nasty Teacher That CANNOT teach students
- DXP_protel2004_原理图设计基础_新建和添加原理图库文件_元件编辑范例
- mulesoft MCIA 破釜沉舟备考 2023.04.29.27 (易错题)
- postman高级用法+Jenkins持续集成
热门文章
- 基于CCS工程MSP430串口升级(二)
- Orge配置Debug - 在Mac上利用Homebrew安装指定版本的Cmake
- java刮刮乐_大众学开发——59秒学习编写刮刮乐游戏
- 两个案例带你搞定JBoss Marshalling编解码在Netty中的应用
- 关于使用xftp上传可读文件夹权限不足的问题
- ensp中ap获取不到ip_[网络求助]华为ap无法获取到ip
- Aspect Level Sentiment Classification with Deep Memory Network
- 嫉妒心太强该怎么办?
- ex is not shell_linux下环境变量详解
- Jetpack Compose - Modifier入门篇