本文介绍了我可以使用公共getter和私有setter创建属性吗?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧! 问题描述 29岁程序员,3月因学历无情被辞! 我想为我的实例变量使用属性,但在许多情况下,我只想让类本身有权访问setter。我希望我可以做这样的事情:I'd like to use properties for my instance variables, but in many cases, I only want the class itself to have access to the setter. I was hoping I could do something like this: Foo.h:@interface Foo { NSString *bar;}@property (readonly) NSString *bar;@end Foo.m:#import "Foo.h"@interface Foo ()@property (copy) NSString *bar;@end@implementation Foo@synthesize bar;@end但这会产生警告:Foo.m:4: warning: property ‘bar’ attribute in ‘Foo’ class continuation does not match class ‘Foo’ property我可以看到它的抱怨,但它仍然是一个有用的成语。有没有其他方法来完成这个没有写我自己的setters?I can see what it's complaining about, but it still seems like a useful idiom. Is there some other way to accomplish this without writing my own setters?推荐答案您的方法是正确的,但重新声明 @property bar 在类扩展中必须匹配原始声明,除了readwrite和readonly。所以这将工作:Your approach is correct, but the redeclaration of @property bar in the class extension must match the original declaration except for readwrite vs. readonly. So this will work: Foo.h@interface Foo { NSString *bar;}@property (copy,readonly) NSString *bar;@end Foo.m:#import "Foo.h"@interface Foo ()@property (copy,readwrite) NSString *bar;@end@implementation Foo@synthesize bar;@end(回忆默认值为 code>属性,而不是 copy )。 这篇关于我可以使用公共getter和私有setter创建属性吗?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持! 上岸,阿里云!