如图新建一个viewController和DetailViewController
VC 和DetailVC 联线的Idetnifier 设置为：GoDetailVC
ViewController主要代码
- (IBAction)signInButtonTouched:(id)sender {
[self performSegueWithIdentifier:@"GoDetailVC" sender:self];
} #pragma mark - prepare segue
// A页面传值到B页面
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
[super prepareForSegue:segue sender:sender];
if ([segue.identifier isEqualToString:@"GoDetailVC"]) {
DetailViewController *detailVC = segue.destinationViewController;
detailVC.passValue = self.usernameTextField.text;
}
} // B页面传值到A页面
-(IBAction)done:(UIStoryboardSegue *)segue{
if ([segue.sourceViewController isKindOfClass:[DetailViewController class]]) {
DetailViewController * svc = (DetailViewController *)segue.sourceViewController;
self.passwordTextField.text = svc.textField.text;
}
}
在StoryBoard中 DetailViewController的Done按钮 Action关联到 viewController的done方法 如图
1.在VC页面中第一个textField中输入值 点击 Sing in 按钮就会把值传到DetailViewController 的textField中显示出来。
2.在DetailViewController textField中修改值 点击Done 按钮就会把值回传到ViewController中
如果 是Present 方式要怎么传值勒。如图
用如下代码肯定传值行不通
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
[super prepareForSegue:segue sender:sender];
if ([segue.identifier isEqualToString:@"GoDetailVC"]) {
DetailViewController *detailVC = segue.destinationViewController; // 因为这取出来的是NavigationController 不是DetailViewController
detailVC.passValue = self.usernameTextField.text;
}
} 所以修改为如下：
// A页面传值到B页面
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
[super prepareForSegue:segue sender:sender];
if([[segue identifier] isEqualToString:@"GoDetailVC"])
{
NSArray *viewControllerArray = [segue.destinationViewController viewControllers];
DetailViewController *detailVC = [viewControllerArray objectAtIndex:];
detailVC.passValue = self.usernameTextField.text;
}
}