Xcode - storyboard_OC版 07：选择器场景

选择器场景

1 - 现在实现一功能：在 WarriorAdded Scene 中单击指定的 cell 就会打开一个新场景。那么拖进一个新控件 TableViewController，选中 WarriorAdded Scene 的单元格后按住 ctrl 键进行联线：segue 选择 Push 并把它的 Identifier 更名 DetailsStatus；把新场景标题更名成 WarriorStatus ，并把其单元格的 Style 置为 Subtitle 以及把 Identifier 置为 StatusCell

2 - 新建 UITableViewController 子类 WarriorStatusVC，并在 storyboard 中完成与 WarriorStatus 场景关联

3 - 在 WarriorStatusController.m 中配置数据

#import "WarriorStatusVC.h"
#import "Warrior.h"
@interface WarriorStatusVC ()
@end

@implementation WarriorStatusVC{
    
    NSArray *_statusArray;
}


- (void)viewDidLoad {
    [super viewDidLoad];

    _statusArray = [NSArray arrayWithObjects:
                   [NSString stringWithFormat:@"%@_%d",@"フリーザ",FC_Base],
                   [NSString stringWithFormat:@"%@_%d",@"ベビー",FC_Base],
                   [NSString stringWithFormat:@"%@_%d",@"セル",FC_Base],
                   [NSString stringWithFormat:@"%@_%d",@"ブウ",FC_Base],
                   [NSString stringWithFormat:@"%@_%d",@"ラズリ",FC_Base],
                   [NSString stringWithFormat:@"%@_%d",@"ブロリー",FC_Base],nil];
    
}
#pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {

    return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    
     return [_statusArray count];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"StatusCell" forIndexPath:indexPath];
    
        NSArray *newArray = [[_statusArray objectAtIndex:indexPath.row] componentsSeparatedByString:@"_"];
        cell.textLabel.text = [newArray firstObject];
        cell.detailTextLabel.text = [newArray lastObject];
    return cell;
    
}

运行效果：WarriorAdded Scene  |   WarriorStatus Scene

　　

4 - 在开发过程中，如果推出一个新页面却不传回任何数据就回到上级页面的话，那它也就没什么实际意义。下面利用代理代理器来完成反向传值功能 

// - WarriorStatusVC.h

#import <UIKit/UIKit.h>
@class WarriorStatusVC;

// 声明协议
@protocol WarriorStatusDelegate <NSObject>

- (void)warriorStatus:(WarriorStatusVC *)controller didSelectName:(NSString *)name withCapacity:(NSString *)fcValue;

@end
@interface WarriorStatusVC : UITableViewController

@property(nonatomic,weak)id <WarriorStatusDelegate> delegate;// 代理
@property(nonatomic,strong)NSString *name;

@end

// - WarriorStatusVC.m

#import "WarriorStatusVC.h"
#import "Warrior.h"
@implementation WarriorStatusVC{
    
    NSArray *_statusArray;
    NSUInteger _selectedIndex; // 已选下标
}


- (void)viewDidLoad {
    [super viewDidLoad];

    _statusArray = [NSArray arrayWithObjects:
                   [NSString stringWithFormat:@"%@_%d",@"フリーザ",FC_Base],
                   [NSString stringWithFormat:@"%@_%d",@"ベビー",FC_Base],
                   [NSString stringWithFormat:@"%@_%d",@"セル",FC_Base],
                   [NSString stringWithFormat:@"%@_%d",@"ブウ",FC_Base],
                   [NSString stringWithFormat:@"%@_%d",@"ラズリ",FC_Base],
                   [NSString stringWithFormat:@"%@_%d",@"ブロリー",FC_Base],nil];
    
    
    // 简单判断 self.name
    // 如果不为空且 _statusArray 则检查数组中是否包含该值
    // 如果包含就获取其下标
    if (self.name.length !=0) {

        int i = 0; // 下标
        for (NSString *str_i in _statusArray) {
            i ++;
            if ([str_i containsString:self.name]) {
                i--;
                break;
            }
        }
        _selectedIndex = i;
    }
    
}
#pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {

    return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    
     return [_statusArray count];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"StatusCell" forIndexPath:indexPath];
    
    NSArray *newArray = [[_statusArray objectAtIndex:indexPath.row] componentsSeparatedByString:@"_"];
    cell.textLabel.text = [newArray firstObject];
    cell.detailTextLabel.text = [newArray lastObject];
    
    if (self.name.length !=0) {
        if (indexPath.row == _selectedIndex){
            cell.accessoryType = UITableViewCellAccessoryCheckmark;// 选中
        }else{
            cell.accessoryType = UITableViewCellAccessoryNone;
        }
    }else{
        cell.accessoryType = UITableViewCellAccessoryNone;
    }
    return cell;
    
}

// 选中行打对勾
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{

    [tableView deselectRowAtIndexPath:indexPath animated:YES];
    if(_selectedIndex != NSNotFound){
        
        UITableViewCell *cell = [tableView cellForRowAtIndexPath:[NSIndexPath indexPathForRow:_selectedIndex inSection:0]];
        cell.accessoryType = UITableViewCellAccessoryNone;
    }
    _selectedIndex = indexPath.row;
    UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
    cell.accessoryType = UITableViewCellAccessoryCheckmark;
    NSArray *newArray = [[_statusArray objectAtIndex:indexPath.row] componentsSeparatedByString:@"_"];
    NSLog(@"%@",newArray);
    [self.delegate warriorStatus:self didSelectName:[newArray firstObject] withCapacity:[newArray lastObject]];
}

@end

// - WarriorAddedVC.m：接受 WarriorStatusDelegate 协议并实现其代理方法

#import "WarriorAddedVC.h"
#import "Warrior.h"
#import "WarriorStatusVC.h"
@interface WarriorAddedVC ()<WarriorStatusDelegate>

@end

// prepareForSegue
-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{

    if ([segue.identifier isEqualToString:@"DetailsStatus"]){
        WarriorStatusVC *wsVC = segue.destinationViewController;
        wsVC.name = self.inputName.text;// 属性传值
        wsVC.delegate = self;
    }
}

// 实现代理
-(void)warriorStatus:(WarriorStatusVC *)controller didSelectName:(NSString *)name withCapacity:(NSString *)fcValue{
    NSLog(@"name = %@,fcValue = %@",name,fcValue);
    self.inputName.text = name;
    self.inputAge.text = fcValue;
}

运行效果：进入 WarriorStatus 页面  |  选择倒数第二行返回上级页面并传值  |  再次进入 WarriorStatus 页面：选中效果