ios界面逆向传值的方法(总结)

释放双眼,带上耳机,听听看~!

 

 

第一种:代理传值
第二个控制器:

@protocol WJSecondViewControllerDelegate 
- (void)changeText:(NSString*)text;
@end
@property(nonatomic,assign)iddelegate;
- (IBAction)buttonClick:(UIButton*)sender {
_str = sender.titleLabel.text;
[self.delegate changeText:sender.titleLabel.text];
[self.navigationController popViewControllerAnimated:YES];
}

第一个控制器:

- (IBAction)pushToSecond:(id)sender {
WJSecondViewController *svc = [[WJSecondViewController alloc]initWithNibName:@"WJSecondViewController" bundle:nil];
svc.delegate = self;
svc.str = self.navigationItem.title;
[self.navigationController pushViewController:svc animated:YES];
[svc release];
}
- (void)changeText:(NSString *)text{
self.navigationItem.title = text;
}

第二种:通知传值
第一个控制器:

//注册监听通知
[[NSNotificationCenter defaultCenter] addObserver:self     selector:@selector(limitDataForModel:) name:@"NOV" object:nil];
- (void)limitDataForModel:(NSNotification *)noti{
self.gamesInfoArray = noti.object;
}

第二个控制器:

//发送通知
[[NSNotificationCenter defaultCenter]   postNotificationName:@"NOV" object:gameArray];

第三种:单例传值
Single是一个单例类,并且有一个字符串类型的属性titleName
在第二个控制器:

- (IBAction)buttonClick:(UIButton*)sender {
Single *single = [Single sharedSingle];
single.titleName = sender.titleLabel.text;
[self.navigationController popViewControllerAnimated:YES];
}

第一个控制器:

- (void)viewWillAppear:(BOOL)animated{
[super viewWillAppear:animated];
Single *single = [Single sharedSingle];
self.navigationItem.title = single.titleName;
}

第四种:block传值
第二个控制器:

@property (nonatomic,copy) void (^changeText_block)(NSString*);
- (IBAction)buttonClick:(UIButton*)sender {
_str = sender.titleLabel.text;
self.changeText_block(sender.titleLabel.text);
[self.navigationController popViewControllerAnimated:YES];
}

第一个控制器:

- (IBAction)pushToSecond:(id)sender {
WJSecondViewController *svc = [[WJSecondViewController alloc]initWithNibName:@"WJSecondViewController" bundle:nil];
svc.str = self.navigationItem.title;
[svc setChangeText_block:^(NSString *str) {
>self.navigationItem.title = str;
}];
[self.navigationController pushViewController:svc animated:YES];
}

第五种:extern传值
第二个控制器:

extern NSString *btn;
- (IBAction)buttonClick:(UIButton*)sender {
btn = sender.titleLabel.text;
[self.navigationController popViewControllerAnimated:YES];
}

第一个控制器:

NSString *btn = nil;
- (void)viewWillAppear:(BOOL)animated{
[super viewWillAppear:animated];
self.navigationItem.title = btn;
}

第六种:KVO传值
第一个控制器:

- (void)viewDidLoad {
[super viewDidLoad];
_vc =[[SecondViewController alloc]init];
//self监听vc里的textValue属性
[_vc addObserver:self forKeyPath:@"textValue" options:0 context:nil];
}

第二个控制器:

- (IBAction)buttonClicked:(id)sender {
self.textValue = self.textField.text;
[self.navigationController popViewControllerAnimated:YES];
}

 

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