这里是你想要的：

Class theClass = NSClassFromString(classNameStr);
id myObject = [[theClass alloc] init];

请注意，您不能使用 theClass 作为类型名称（即 theClass * myObject ）。您必须使用 id 。

Note that you can't use theClass as a type name (i.e. theClass *myObject). You'll have to use id for that.