[OC]单例的写法

@interface NTESLanguageManager : NSObject
@property (nonatomic,strong) NSDictionary *langDict;
+ (NTESLanguageManager *)shareInstance;

@end

@implementation NTESLanguageManager

static NTESLanguageManager *shareInstance = nil;

+ (NTESLanguageManager *)shareInstance{
    @synchronized(self) {
        if (shareInstance == nil) {
            shareInstance = [[NTESLanguageManager alloc] init];
        }
        return shareInstance;
    }
}
@end