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
1 #import "WarriorStatusVC.h" 2 #import "Warrior.h" 3 @interface WarriorStatusVC () 4 @end 5 6 @implementation WarriorStatusVC{ 7 8 NSArray *_statusArray; 9 } 10 11 12 - (void)viewDidLoad { 13 [super viewDidLoad]; 14 15 _statusArray = [NSArray arrayWithObjects: 16 [NSString stringWithFormat:@"%@_%d",@"フリーザ",FC_Base], 17 [NSString stringWithFormat:@"%@_%d",@"ベビー",FC_Base], 18 [NSString stringWithFormat:@"%@_%d",@"セル",FC_Base], 19 [NSString stringWithFormat:@"%@_%d",@"ブウ",FC_Base], 20 [NSString stringWithFormat:@"%@_%d",@"ラズリ",FC_Base], 21 [NSString stringWithFormat:@"%@_%d",@"ブロリー",FC_Base],nil]; 22 23 } 24 #pragma mark - Table view data source 25 - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView { 26 27 return 1; 28 } 29 30 - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { 31 32 return [_statusArray count]; 33 } 34 35 - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { 36 37 UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"StatusCell" forIndexPath:indexPath]; 38 39 NSArray *newArray = [[_statusArray objectAtIndex:indexPath.row] componentsSeparatedByString:@"_"]; 40 cell.textLabel.text = [newArray firstObject]; 41 cell.detailTextLabel.text = [newArray lastObject]; 42 return cell; 43 44 }
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
1 #import <UIKit/UIKit.h> 2 @class WarriorStatusVC; 3 4 // 声明协议 5 @protocol WarriorStatusDelegate <NSObject> 6 7 - (void)warriorStatus:(WarriorStatusVC *)controller didSelectName:(NSString *)name withCapacity:(NSString *)fcValue; 8 9 @end 10 @interface WarriorStatusVC : UITableViewController 11 12 @property(nonatomic,weak)id <WarriorStatusDelegate> delegate;// 代理 13 @property(nonatomic,strong)NSString *name; 14 15 @end
// - WarriorStatusVC.m
1 #import "WarriorStatusVC.h" 2 #import "Warrior.h" 3 @implementation WarriorStatusVC{ 4 5 NSArray *_statusArray; 6 NSUInteger _selectedIndex; // 已选下标 7 } 8 9 10 - (void)viewDidLoad { 11 [super viewDidLoad]; 12 13 _statusArray = [NSArray arrayWithObjects: 14 [NSString stringWithFormat:@"%@_%d",@"フリーザ",FC_Base], 15 [NSString stringWithFormat:@"%@_%d",@"ベビー",FC_Base], 16 [NSString stringWithFormat:@"%@_%d",@"セル",FC_Base], 17 [NSString stringWithFormat:@"%@_%d",@"ブウ",FC_Base], 18 [NSString stringWithFormat:@"%@_%d",@"ラズリ",FC_Base], 19 [NSString stringWithFormat:@"%@_%d",@"ブロリー",FC_Base],nil]; 20 21 22 // 简单判断 self.name 23 // 如果不为空且 _statusArray 则检查数组中是否包含该值 24 // 如果包含就获取其下标 25 if (self.name.length !=0) { 26 27 int i = 0; // 下标 28 for (NSString *str_i in _statusArray) { 29 i ++; 30 if ([str_i containsString:self.name]) { 31 i--; 32 break; 33 } 34 } 35 _selectedIndex = i; 36 } 37 38 } 39 #pragma mark - Table view data source 40 - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView { 41 42 return 1; 43 } 44 45 - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { 46 47 return [_statusArray count]; 48 } 49 50 - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { 51 52 UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"StatusCell" forIndexPath:indexPath]; 53 54 NSArray *newArray = [[_statusArray objectAtIndex:indexPath.row] componentsSeparatedByString:@"_"]; 55 cell.textLabel.text = [newArray firstObject]; 56 cell.detailTextLabel.text = [newArray lastObject]; 57 58 if (self.name.length !=0) { 59 if (indexPath.row == _selectedIndex){ 60 cell.accessoryType = UITableViewCellAccessoryCheckmark;// 选中 61 }else{ 62 cell.accessoryType = UITableViewCellAccessoryNone; 63 } 64 }else{ 65 cell.accessoryType = UITableViewCellAccessoryNone; 66 } 67 return cell; 68 69 } 70 71 // 选中行打对勾 72 -(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{ 73 74 [tableView deselectRowAtIndexPath:indexPath animated:YES]; 75 if(_selectedIndex != NSNotFound){ 76 77 UITableViewCell *cell = [tableView cellForRowAtIndexPath:[NSIndexPath indexPathForRow:_selectedIndex inSection:0]]; 78 cell.accessoryType = UITableViewCellAccessoryNone; 79 } 80 _selectedIndex = indexPath.row; 81 UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath]; 82 cell.accessoryType = UITableViewCellAccessoryCheckmark; 83 NSArray *newArray = [[_statusArray objectAtIndex:indexPath.row] componentsSeparatedByString:@"_"]; 84 NSLog(@"%@",newArray); 85 [self.delegate warriorStatus:self didSelectName:[newArray firstObject] withCapacity:[newArray lastObject]]; 86 } 87 88 @end
// - WarriorAddedVC.m：接受 WarriorStatusDelegate 协议并实现其代理方法
1 #import "WarriorAddedVC.h" 2 #import "Warrior.h" 3 #import "WarriorStatusVC.h" 4 @interface WarriorAddedVC ()<WarriorStatusDelegate> 5 6 @end
1 // prepareForSegue 2 -(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{ 3 4 if ([segue.identifier isEqualToString:@"DetailsStatus"]){ 5 WarriorStatusVC *wsVC = segue.destinationViewController; 6 wsVC.name = self.inputName.text;// 属性传值 7 wsVC.delegate = self; 8 } 9 } 10 11 // 实现代理 12 -(void)warriorStatus:(WarriorStatusVC *)controller didSelectName:(NSString *)name withCapacity:(NSString *)fcValue{ 13 NSLog(@"name = %@,fcValue = %@",name,fcValue); 14 self.inputName.text = name; 15 self.inputAge.text = fcValue; 16 }
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
