Ios can'；t使用准备segue方法执行segue

您好，我正在尝试使用prepareforsegue方法执行segue。我一直在关注这个问题，但我无法成功注册。当我单击“注册”按钮时，它所做的只是注册用户并在那里停止。我通过视图控制器（而不是按钮本身）连接了我的segue，所以这一点没有问题。我的发送视图只是一个带有文本字段和“完成”按钮的普通视图，而我的接收视图是一个静态表视图，行上有一个标签（称为nameLabel）

2个问题

1.我的prepare for segue方法缺少什么？（我也将parse用作后端，因此PFLogInSuccessNotification来自于此）

如何将用户的用户名传递到我的纵断面图

谢谢你花时间帮忙

**my segue method**

 -(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    NSLog(@"can you see this");
    if ([segue.identifier isEqualToString:@"SegueTOprofile"])
    {
        if (PFLogInSuccessNotification) {
       profileTableViewController *myProfileView = (profileTableViewController *)[segue destinationViewController];

            PFUser *user =[PFUser user];
            user.username = myProfileView.nameLabel.text;
                   //   NSLog(@"%@",myProfileView.nameLabel.text);
    }

    }
    [self performSegueWithIdentifier:@"SegueTOprofile" sender:self];


}

**这是我的注册视图** h

#导入
extern NSString*常量PFSIGNUPSUCCESS通知；
外部NSString*常量PFSignUpFailureNotification；
@界面注册ViewController:UIViewController
@属性（强，非原子）IBOutlet UITextField*emailNameField；
@属性（强，非原子）IBUITextField*passwordField；
@属性（强，非原子）IBUIButton*signupButton；
-（iAction）注册：（id）发件人；
@属性（强，非原子）IBOutlet UITextField*repeatPasswordField；
@属性（强，非原子）IBUIBarbuttonItem*BackButton；
@属性（强，非原子）IBOutlet UITextField*usernameField；

m

#导入“SignUpViewController.h”
#导入“profileTableViewController.h”
#进口
#导入“ActivityView.h”
#导入“TabBarCustomClassViewController.h”
@接口SignUpViewController（）
-（作废）处理字段条目；
-（作废）文本输入更改：（NSNotification*）注释；
-（BOOL）应启用一个按钮；
@结束
@实现注册视图控制器
@综合signupButton=_signupButton；
-（id）initWithNibName:（NSString*）nibNameOrNil bundle:（NSBundle*）nibBundleOrNil
{
self=[super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]；
如果（自我）{
//自定义初始化
}
回归自我；
}
-（无效）viewDidLoad
{
[超级视图下载]；
[[NSNotificationCenter defaultCenter]添加观察者：自选择器：@selector（textInputChanged:）名称：UITextFieldTextDidChangeNotification对象：_usernameField]；
[[NSNotificationCenter defaultCenter]添加观察者：自选择器：@selector（textInputChanged:）名称：UITextFieldTextDidChangeNotification对象：_emailNameField]；
[[NSNotificationCenter defaultCenter]添加观察者：自选择器：@selector（textInputChanged:）名称：UITextFieldTextDidChangeNotification对象：_passwordField]；
[[NSNotificationCenter defaultCenter]添加观察者：自选择器：@selector（textInputChanged:）名称：UITextFieldTextDidChangeNotification对象：_repeatPasswordField]；
}
-（布尔）应自动旋转指针面定向：（UIInterfaceOrientation）interfaceOrientation{
//对于支持的方向返回YES
返回（interfaceOrientation==UIInterfaceOrientationGraphic）；
}
-（BOOL）textField应返回：（UITextField*）textField
{
if（textField==\u usernameField）{
[\u usernameField成为第一响应者]；
}
如果（textField==\u emailNameField）{
[\u emailNameField成为第一响应者]；}
if（textField==\u passwordField）{
[[u passwordField成为第一响应者]；
}
if（textField==\u repeatPasswordField）{
[_repeatPasswordField成为第一响应者]；
}
返回YES；
}
-（BOOL）应禁用一个按钮
{
BOOL enableDoneButton=否；
如果（_emailNameField.text！=nil&&&u passwordField.text！=nil&&u repeatPasswordField！=nil&&u usernameField.text！=nil）{
enableDoneButton=YES；
}
返回使能按钮；
}
/*
//使用segue-->将当前选定的配置文件发送到“ProfileView”
ProfileViewController*aProfileView=（ProfileViewController*）[segue destinationViewController]；
aProfileView.currentProfile=selectedProfile*/
-（void）prepareForSegue:（UIStoryboardSegue*）segue发送方：（id）发送方
{
NSLog（@“你能看到这个吗”）；
if（[segue.identifier IsequalString:@“SegueTOprofile”]）
{
if（PFLogInSuccessNotification）{
profileTableViewController*myProfileView=（profileTableViewController*）[segue destinationViewController]；
PFUser*user=[PFUser-user]；
user.username=myProfileView.namelab.text；
//NSLog（@“%@”，myProfileView.nameLabel.text）；
}
}
[self-PerformsgueWithIdentifier:@“SegueTOprofile”发件人：self]；
}
-（无效）textInputChanged:（NSNotification*）注释
{
_signupButton.enabled=[self shouldEnableDoneButton]；
}
-（无效）未收到记忆警告
{
[超级记忆警告]；
//处置所有可以重新创建的资源。
}
-（iAction）注册：（id）发件人{
[[u usernameField辞职firstresponder]；
[_emailNameField辞职FirstResponder]；
[[u passwordField辞职FirstResponder]；
[_repeatPasswordField辞职FirstResponder]；
[自我处理字段输入]；
}
-（作废）processFieldEntries
{
//检查我们是否有非零用户名和密码。
//再次比较password和password是否相等
//抛出一个对话，告诉他们如果他们做错了，他们做错了什么。
NSString*email=\u emailNameField.text；
NSString*passwordd=\u passwordField.text；
NSString*passwordAgainn=\u repeatPasswordField.text；
NSString*username=\u usernameField.text；
NSString*errorText=@“请”；
NSString*UsernameBankText=@“输入用户名”；
NSString*passwordBlankText=@“输入密码”；
NSString*joinText=@“，和”；
NSString*passwordmistchtext=@“输入相同的密码两次”；
BOOL textError=否；
if（email.length==0 | | passwordd.length==0 | | passwordAgainn.length==0）{
text错误=是；
//为缺少输入的第一个字段设置键盘：
if（passwordAgainn.length==0）{
[[u]重复通行证
#import <UIKit/UIKit.h>
extern NSString *const PFSignUpSuccessNotification;
extern NSString *const PFSignUpFailureNotification;

@interface SignUpViewController : UIViewController<UITextFieldDelegate>


@property (strong, nonatomic) IBOutlet UITextField *emailNameField;
@property (strong, nonatomic) IBOutlet UITextField *passwordField;
@property (strong, nonatomic) IBOutlet UIButton *signupButton;
- (IBAction)SignUp:(id)sender;
@property (strong, nonatomic) IBOutlet UITextField *repeatPasswordField;
@property (strong, nonatomic) IBOutlet UIBarButtonItem *BackButton;
@property (strong, nonatomic) IBOutlet UITextField *usernameField;

#import "SignUpViewController.h"
#import "profileTableViewController.h"
#import <Parse/Parse.h>
#import "ActivityView.h"
#import "TabBarCustomClassViewController.h"
@interface SignUpViewController ()

-(void)processFieldEntries;
- (void)textInputChanged:(NSNotification *)note;
- (BOOL)shouldEnableDoneButton;

@end

@implementation SignUpViewController
@synthesize signupButton = _signupButton;

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}


- (void)viewDidLoad
{
    [super viewDidLoad];


    [[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(textInputChanged:) name:UITextFieldTextDidChangeNotification object:_usernameField];

    [[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(textInputChanged:) name:UITextFieldTextDidChangeNotification object:_emailNameField];

    [[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(textInputChanged:) name:UITextFieldTextDidChangeNotification object:_passwordField];

    [[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(textInputChanged:) name:UITextFieldTextDidChangeNotification object:_repeatPasswordField];


}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
    // Return YES for supported orientations
    return (interfaceOrientation == UIInterfaceOrientationPortrait);
}

-(BOOL)textFieldShouldReturn:(UITextField *)textField
{
    if (textField == _usernameField) {
        [_usernameField becomeFirstResponder];
    }
    if (textField == _emailNameField) {
  [_emailNameField becomeFirstResponder];}
    if (textField == _passwordField) {
        [_passwordField becomeFirstResponder];
    }
    if (textField == _repeatPasswordField) {
        [_repeatPasswordField becomeFirstResponder];
    }

    return  YES;
}

-(BOOL)shouldEnableDoneButton
{
    BOOL enableDoneButton = NO;
    if (_emailNameField.text != nil && _passwordField.text != nil && _repeatPasswordField != nil && _usernameField.text != nil) {
        enableDoneButton = YES;
    }
    return enableDoneButton;
}
/*
 // Using segue --> Send the current selected profile to "ProfileView"
 ProfileViewController *aProfileView = (ProfileViewController *)[segue destinationViewController];
 aProfileView.currentProfile = selectedProfile; */


 -(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    NSLog(@"can you see this");
    if ([segue.identifier isEqualToString:@"SegueTOprofile"])
    {
        if (PFLogInSuccessNotification) {
       profileTableViewController *myProfileView = (profileTableViewController *)[segue destinationViewController];

            PFUser *user =[PFUser user];
            user.username = myProfileView.nameLabel.text;
                   //   NSLog(@"%@",myProfileView.nameLabel.text);
    }

    }
    [self performSegueWithIdentifier:@"SegueTOprofile" sender:self];


}



-(void)textInputChanged:(NSNotification *)note
{
    _signupButton.enabled = [self shouldEnableDoneButton];

}
- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

- (IBAction)SignUp:(id)sender {
    [_usernameField resignFirstResponder];
    [_emailNameField resignFirstResponder];
    [_passwordField resignFirstResponder];
    [_repeatPasswordField resignFirstResponder];
    [self processFieldEntries];
}
-(void)processFieldEntries
{
    // Check that we have a non-zero username and passwords.
    // Compare password and passwordAgain for equality
    // Throw up a dialog that tells them what they did wrong if they did it wrong.
    NSString *email = _emailNameField.text;
    NSString *passwordd = _passwordField.text;
    NSString *passwordAgainn = _repeatPasswordField.text;
    NSString *username = _usernameField.text;

    NSString *errorText = @"Please ";
    NSString *usernameBlankText = @"enter a username";
    NSString *passwordBlankText = @"enter a password";
    NSString *joinText = @", and ";
    NSString *passwordMismatchText = @"enter the same password twice";


    BOOL textError = NO;

    if (email.length == 0 || passwordd.length == 0 || passwordAgainn.length == 0) {
        textError = YES;

        // Set up the keyboard for the first field missing input:
        if (passwordAgainn.length == 0) {
            [_repeatPasswordField becomeFirstResponder];
        }
        if (passwordd.length == 0) {
            [_passwordField becomeFirstResponder];
        }
        if (username.length == 0) {
            [_usernameField becomeFirstResponder];
        }

        if (email.length == 0) {
            errorText = [errorText stringByAppendingString:usernameBlankText];
        }

        if (passwordd.length == 0 || passwordAgainn.length == 0) {
            if (email.length == 0) { // We need some joining text in the error:
                errorText = [errorText stringByAppendingString:joinText];
            }
            errorText = [errorText stringByAppendingString:passwordBlankText];
        }
    } else if ([passwordd compare:passwordAgainn] != NSOrderedSame) {
        // We have non-zero strings.
        // Check for equal password strings.
        if (_signupButton.enabled == YES) {
            textError = YES;
            errorText = [errorText stringByAppendingString:passwordMismatchText];

        }
    }
    if (textError) {
        UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:errorText message:nil delegate:self cancelButtonTitle:nil otherButtonTitles:@"Ok", nil];
        [alertView show];
        return;
    }

    // Everything looks good; try to log in.
    // Disable the done button for now.
    _signupButton.enabled = NO;
    ActivityView *activityView = [[ActivityView alloc] initWithFrame:CGRectMake(0.f, 0.f, self.view.frame.size.width, self.view.frame.size.height)];

    UILabel *label = activityView.label;
    label.text = @"Signing You Up";
    label.font = [UIFont boldSystemFontOfSize:20.f];
    [activityView.activityIndicator startAnimating];
    [activityView layoutSubviews];

    [self.view addSubview:activityView];

    // Call into an object somewhere that has code for setting up a user.
    // The app delegate cares about this, but so do a lot of other objects.
    // For now, do this inline.

    PFUser *user = [PFUser user];

    user.email = email;
    user.password = passwordAgainn;
    user.username = username;
    [user signUpInBackgroundWithBlock:^(BOOL succeeded, NSError *error) {
        if (error) {
            UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:[[error userInfo] objectForKey:@"error"] message:nil delegate:self cancelButtonTitle:nil otherButtonTitles:@"Ok", nil];
            [alertView show];
            _signupButton.enabled = [self shouldEnableDoneButton];
            [activityView.activityIndicator stopAnimating];
            [activityView removeFromSuperview];
            // Bring the keyboard back up, because they'll probably need to change something.
            [_emailNameField becomeFirstResponder];

            return;
        }

        // Success!
        [activityView.activityIndicator stopAnimating];
        [activityView removeFromSuperview];




}];
}
@end

[self shouldPerformSegueWithIdentifier:@"SegueTOprofile" sender:self];

[self performSegueWithIdentifier:@"SegueTOprofile" sender:self];