2016-1-5第一个完整APP 私人通讯录的实现 3：添加联系人

#import <UIKit/UIKit.h>

@class addContactViewConroller,contact;


@protocol AddContactViewConrollerDelegate<NSObject>
@optional
- (void)addContactViewController:(addContactViewConroller *)addContactViewController didSaveContactwithName:(NSString*)name tel:(NSString *)tel;
//传递模型使得代码可维护性更高
- (void) addContactViewController:(addContactViewConroller *)addContactViewController didSaveContactWithContact:(contact *)contact;
@end


@interface addContactViewConroller :UIViewController
@property (weak, nonatomic) id<AddContactViewConrollerDelegate>delegate;
@end

#import "addContactViewConroller.h"
#import "contact.h"
@interface addContactViewConroller ()
@property (weak, nonatomic) IBOutlet UITextField *nameField;
@property (weak, nonatomic) IBOutlet UITextField *telField;
@property (weak, nonatomic) IBOutlet UIButton *saveBtn;
@end
@implementation addContactViewConroller

- (void)viewDidLoad {
    [super viewDidLoad];
}
- (IBAction)saveBtnClick {
//    判断代理是否实现了代理方法
//    if ([self.delegate respondsToSelector:@selector(addContactViewController:didSaveContactwithName:tel:)]) {
//        [self.delegate addContactViewController:self didSaveContactwithName:self.nameField.text tel:self.telField.text];
    if ([self.delegate respondsToSelector:@selector(addContactViewController:didSaveContactWithContact:)]) {
        contact *con = [[contact alloc] init];
        con.name = self.nameField.text;
        con.tel = self.telField.text;
//        直接专递给代理模型数据
        [self.delegate addContactViewController:self didSaveContactWithContact:con];
    }
}
@end

#import "contactTableViewController.h"
#import "contact.h"
#import "addContactViewConroller.h"

@interface contactTableViewController ()<AddContactViewConrollerDelegate>
//定义一个可变数组，用于存放联系人
@property (strong, nonatomic) NSMutableArray *contacts;

@end

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
    return 1;
}
//每组有多少行(row)
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    return  self.contacts.count;
}
//设置显示内容
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    NSLog(@"%s",__func__);
//    需要先设置cell的id，用于创建可重用cell。
   //1.获得可重用的id
    static NSString *Id = @"contactCell";
   //2.创建可重用的cell
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:Id];
    //3.显示数据
    contact *contact = self.contacts[indexPath.row];
    cell.textLabel.text = contact.name;
    cell.detailTextLabel.text = contact.tel;
    //4.返回cell
    return cell;
}

//- (void)addContactViewController:(addContactViewConroller *)addContactViewController didSaveContactwithName:(NSString *)name tel:(NSString *)tel
//{
////    建立模型并赋值
//    contact *con = [[contact  alloc] init];
//    con.name = name;
//    con.tel = tel;
////    把模型放进数组里
//    [self.contacts addObject:con];
////    隐藏目标控制器
//#warning 虽然是代理调用的这个方法，但是隐藏的还是目标控制器!
//    [self.navigationController popViewControllerAnimated:YES];
////    刷新tableView
//    [self.tableView reloadData];
//}
- (void) addContactViewController:(addContactViewConroller *)addContactViewController didSaveContactWithContact:(contact *)contact
{
//    将模型放进数组里
    
    [self.contacts addObject:contact];
    
//    刷新tableView
    NSIndexPath *indexPath = [NSIndexPath indexPathForRow:self.contacts.count-1 inSection:0];
    [self.tableView insertRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationLeft];
//    [self.tableView reloadData];
    
//    隐藏目标控制器
    [self.navigationController popViewControllerAnimated:YES];
}

//获取目标控制器
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    id destVc =segue.destinationViewController;
//    判断目标控制器的类型
    if ([destVc isKindOfClass:[addContactViewConroller class]]) {
        addContactViewConroller *addContactViewController = destVc;
//        如果符合目标控制器的类型，则设置目标控制的代理
        addContactViewController.delegate = self;
    }
}