+ (instancetype)shareManager{ static <#CLassName#> * manager = nil; static dispatch_once_t onceToken; dispatch_once(&onceToken, ^{ if (manager == nil) { manager = [[self alloc]init]; } }); ...

// .h文件单例初始化接口方法+ (XMLDictionaryParser *)sharedInstance;// .m文件单例初始化方法+ (XMLDictionaryParser *)sharedInstance{   static dispatch_once_t once;    staticXMLDictionaryPa