可达性% ld:重复的符号_OBJC_IVAR_$_Reachability.localWiFiRef

Question

我包含“可达性/可达性.m”

AppDelegate.h

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

@class ...;

@interface ... : NSObject <UIApplicationDelegate> {
    UIWindow *window;
    ... *viewController;
    Reachability *hostReach;
    NetworkStatus netStatus;
}

@property (nonatomic, retain) IBOutlet UIWindow *window;
@property (nonatomic, retain) IBOutlet UINavigationController *navigationController;
@property (nonatomic) NetworkStatus netStatus;
-(void)updateInterfaceWithReachability: (Reachability*) curReach;

@end


AppDelegate.m


#import "AppDelegate.h"
#import "ViewController.h"

@implementation ...

@synthesize window=_window;
@synthesize navigationController=_navigationController;
@synthesize netStatus;

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {    

    // Override point for customization after application launch.
    [[NSNotificationCenter defaultCenter] addObserver: self selector: @selector(reachabilityChanged:) name: kReachabilityChangedNotification object: nil];
    hostReach = [[Reachability reachabilityWithHostName:@"www.apple.com"]retain];
    [hostReach startNotifier];
    [self updateInterfaceWithReachability:hostReach];


    // Set the view controller as the window's root view controller and display.
    self.window.rootViewController = self.navigationController;
    [self.window makeKeyAndVisible];

    return YES;
}

我得到了一个错误

ld: duplicate symbol _OBJC_IVAR_$_Reachability.localWiFiRef in /Users/../Documents/../build/.. .build/Debug-iphonesimulator/.. .build/Objects-normal/i386/..ViewController.o and /Users/../Documents/../build/.. .build/Debug-iphonesimulator/.. .build/Objects-normal/i386/..AppDelegate.o

Command /Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/gcc-4.2 failed with exit code 1

如何解决这个问题？它可能与什么有关？

Answer 1

我也遇到了同样的问题，因为我正在使用的一个第三方库(libPusher)已经包含了可访问性。

因为该库是预编译的，所以我不确定要做什么，但只向项目添加Reachability.h (而不是Reachability.m)。这允许我导入它并使用类，但我没有重复符号的问题。

Answer 2

您只能导入头文件。做,

#import "Reachability/Reachability.h"

Answer 3

您必须确保您的项目文件夹中包含一个Reacablity.h和一个Reacvicity.m文件，ASIHTTPRequest库中包含这两个文件，因此在添加Reachaity库时会出现重复符号错误。删除重复文件后，执行干净的构建