如何将“SEL”和“ID”转换为NSString？

id parent; SEL selector; // lot's of code... if ([parent respondsToSelector:selector]) { } else { // This doesn't work: NSString *errorMessage = [NSString stringWithFormat:@"%@ in class %@ doesn't exist!", selector, parent]; } 

如何将“SEL”和“id”转换为string？

Answer 1

调用NSStringFromSelector()传递您的select器作为其参数来获取select器string，并且使用[parent class]作为parent对象的类：

 NSString *errorMessage = [NSString stringWithFormat:@"%@ in class %@ doesn't exist!", NSStringFromSelector(selector), [parent class]];