static NSMutableDictionary *_soundIDDict;
/**缓存字典初始化 ,只加载一次*/
+(void)initialize{
_soundIDDict = [NSMutableDictionary dictionary];
}
类方法加Static -------不需要初始化变量
挥毫泼墨,书写人生篇章
static NSMutableDictionary *_soundIDDict;
/**缓存字典初始化 ,只加载一次*/
+(void)initialize{
_soundIDDict = [NSMutableDictionary dictionary];
}