objective-c - 找不到 applicationSupportDirectory？

Question

AppDelegate 总是有一个预先编写的函数:

(NSString *)applicationSupportDirectory {

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSApplicationSupportDirectory, NSUserDomainMask, YES);
    NSString *basePath = ([paths count] > 0) ? [paths objectAtIndex:0] : NSTemporaryDirectory();
    return [basePath stringByAppendingPathComponent:@"SyncFile"];
}

但是，我无法在此类之外调用此方法:

id _appDelegate = (SyncFile_AppDelegate *)[[NSApplication sharedApplication] delegate];
NSLog(@"%@", [_appDelegate applicationSupportDirectory]);

编译器警告我它找不到方法 applicationSupportDirectory...有谁知道我的代码有什么问题吗？非常感谢!

Answer 1

不要忘记#import "SyncFile_AppDelegate.h"