可達性無可見@interface聲明選擇startNotifier

Question

我得到這個錯誤：可達無可見@interface聲明選擇startNotifier

我既包括Reachability.h和.m文件。 我對Objective-C非常陌生，錯誤可能非常小！但任何幫助將是偉大的！

我helloworldViewController.m

#import "helloworldViewController.h" 
#import "Reachability.h" 
#import <SystemConfiguration/SystemConfiguration.h> 


@interface helloworldViewController() 

@end 

@implementation helloworldViewController 
@synthesize networkstatus; 
@synthesize reach; 



#pragma mark Reachability changed 


- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 
    // Do any additional setup after loading the view, typically from a nib. 
     // Check network 
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(reachabilityChanged:) name:kReachabilityChangedNotification object:nil]; 
    self.reach = [Reachability reachabilityWithHostName:@"www.apple.com"]; 
    [self.reach startNotifer]; 

} 

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

- (void)reachabilityChanged:(NSNotification*)note 
{ 
    Reachability* r = [note object]; 
    NetworkStatus ns = r.currentReachabilityStatus; 

    if (ns == NotReachable) 
    { 
     NSString* msg = @"Network problems have rendered the iTunes store inaccessible; please try again later."; 
     UIAlertView* av = [[UIAlertView alloc] initWithTitle:nil 
                message:msg 
                delegate:self 
              cancelButtonTitle:@"Ok" 
              otherButtonTitles:nil]; 
     [av show]; 
     //[av release]; 
    } 
} 


@end 

，這裏是我的helloworldViewController.h

#import <UIKit/UIKit.h> 
#import "Reachability.h" 

@interface helloworldViewController : UIViewController{ 


    Reachability* reach; 
    IBOutlet UILabel *networkstatus; 

} 
@property(strong,nonatomic) UILabel *networkstatus; 
@property (nonatomic, retain) Reachability* reach; 

@end 

Answer 1

你拼寫錯誤的方法。既然你是新的，這裏有幾個建議

[self.reach startNotifier]; 

：

• 在.h文件替換#import "Reachability.h"與@class Reachability改變這一行：

  [self.reach startNotifer]; 
  

  來。

• 擺脫明確的ivars和明確的@synthesize行。讓編譯器爲你生成這些。這假定你正在使用最新的編譯器/ Xcode。
• 你的屬性不一致。一個是strong，另一個是retain。如果您使用的是ARC，則兩者都使用strong。如果您正在使用MRC，則兩者都使用retain。
• 標準約定是類名以大寫字母和方法開頭，變量以小寫字母開頭。兩者都應該使用CamelCase。將您的班級更改爲HelloWorldViewController。將networkstatus更改爲networkStatus。