Controller之间传递数据：属性传值

在项目中，Controller之间传递数据非常之多，这里简单介绍一下属性传值。例如有FirstController 和 SecondController,数据从First传递到Second中，我们如何操作呢，比如我们传递一个字符串到Second,那么我们就可以在Second中创建一个属性，在First中，推向Second的时候,为Second中那个属性赋值即可。

代码如下所示：

Objective-C

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/////////////////FirstViewController////////////////// - (void)viewDidLoad { [super viewDidLoad]; UITextField *textFd = [[UITextField alloc]initWithFrame:CGRectMake(10, 10, 300, 150)]; textFd.borderStyle = UITextBorderStyleRoundedRect; textFd.delegate = self; textFd.tag = 100; [self.view addSubview:textFd]; [textFd release]; UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect]; button.frame = CGRectMake(130, 170, 60, 40); [button setTitle:@"传值" forState:UIControlStateNormal]; [button addTarget:self action:@selector(sendValue:) forControlEvents:UIControlEventTouchUpInside]; [self.view addSubview:button]; } - (void)sendValue:(id)sender { //获取textfd里面的数据 UITextField *textfield = (UITextField *)[self.view viewWithTag:100]; //初始化第二个second SecondViewController *second = [[SecondViewController alloc]init]; //为second中的name属性赋值 second.name = textfield.text; //推过去 [self.navigationController pushViewController:second animated:YES]; [second release]; } - (BOOL)textFieldShouldReturn:(UITextField *)textField { [textField resignFirstResponder]; return YES; }

Objective-C

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////////////////////SecondViewController - (void)viewDidLoad { [super viewDidLoad]; UILabel *nameLable = [[UILabel alloc]initWithFrame:CGRectMake(10, 10, 300, 60)]; nameLable.textAlignment = UITextAlignmentCenter; nameLable.font = [UIFont systemFontOfSize:50]; nameLable.textColor = [UIColor blueColor]; //将属性的值赋值给这个label nameLable.text = self.name; [self.view addSubview:nameLable]; [nameLable release]; }