Ios 对于'；没有可见的@界面；论坛'；声明选择器'；返回最后一页'；

所以我对xCode非常陌生，如果有人能帮我做这件事，我会很有帮助的

我正在创建一个在大多数情况下都非常简单的应用程序。我有一个

UIWebView

将我带到一个移动页面。此页面有一个登录

Facebook

。我遇到的最初问题是，由于它是一个移动站点，登录完成后，我会看到一个空白屏幕。我需要

UIWebView

将我带回我单击的登录处的原始登录。我已经复制了一些代码，我认为这些代码可以工作，但我犯了一个错误

“对于'forum'没有可见的@interface声明选择器'backToLastPage'”

有人能告诉我需要做什么来解决这个问题吗？这可能很简单，但我需要一些帮助

#import "forum.h"
#import "ViewController.h"

@interface forum ()

@end

@implementation forum



-(IBAction)switchback:(id)sender {
    [self dismissViewControllerAnimated:YES completion:nil];
}


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


- (void)viewDidLoad
{
    [super viewDidLoad];
    NSURL *myURL = [NSURL URLWithString:@"http://www.moot.it/yopyipcommunity"];
    NSURLRequest *myRequest = [NSURLRequest requestWithURL:myURL];
    [myWebView loadRequest:myRequest];
}

- (BOOL)webView:(UIWebView *)webView 
        shouldStartLoadWithRequest:(NSURLRequest *)request 
        navigationType:(UIWebViewNavigationType)navigationType
{
    NSString *url = [[request URL] absoluteString];

    //when user status == connected 
    //(has a access_token at facebook oauth response)
    if([url hasPrefix:@"https://m.facebook.com/dialog/oauth"] && 
       [url rangeOfString:@"access_token="].location != NSNotFound)
    {
        [self backToLastPage];
        return NO;
    }

    return YES;
}

- (void)webViewDidFinishLoad:(UIWebView *)webView
{
    NSString *url = [[webView.request URL] absoluteString];

    if([url hasPrefix:@"https://m.facebook.com/dialog/oauth"])
    {
        NSString *bodyHTML = 
       [webView stringByEvaluatingJavaScriptFromString:@"document.body.innerHTML"];

        //Facebook oauth response dead end: 
        //  is a blank body and a head with a script that does
        //nothing. But if you got back to your last page, 
        //  the handler of authResponseChange
        //will catch a connected status 
        //  if user did his login and auth app
        if([bodyHTML isEqualToString:@""])
        {
            [self backToLastPage];
        }
    }   
}

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

@end

---

我认为forum.h是单独的类，backToLastPage方法在该类中声明

@property (nonatomic, strong) forum *forum;

您需要为该类创建分配

self.forum = [forum alloc]init];

您可以这样调用该方法，

[self.forum backToLastPage]

相反，
[self backToLastPage]
我应该在哪里发布self.forum=[forum alloc]init]？在viewDidLoad方法中，我是只是复制并通过它，还是需要其他东西？我试着复制和粘贴它，它给了我错误。什么错误？您在哪里实现了这个方法backToLastPage？我把self.forum=[forum alloc]init]；就在[self.forum backToLastPage]上方；我得到了和以前一样的错误。我还把@property（非原子，强）放到论坛*论坛；在我的.h文件中。