Question

如何为类编写正确的描述方法？

我已经实施了

- (NSString *)description {
     NSString *descriptionString = [NSString stringWithFormat:@"Name: %@ \n Address: %@ \n", self.name, self.address];
     return descriptionString;

}

如果我在我的对象上调用描述，那么Evrey就可以了。但是如果我有一个对象数组并且我在其上调用描述，我得到：

“姓名：Alex \ n地址：某地址\ n”，

我想得到的是

“姓名：Alex

地址：某地址“

Answer 1

此外，您可以使用回车\r，它也将以新行结束（即使在NSArray描述中）

Answer 2

我在iOS框架中挖掘了一些，我发现iOS sdk描述的默认行为不是放置“\ n”而是“;”。

示例：

    UIFont *font = [UIFont systemFontOfSize:18];
    NSLog(@"FontDescription:%@",[font description]);

    NSMutableArray *fontsArray = [NSMutableArray arrayWithCapacity:0];
    for(int index = 0; index < 10; index++) {
        [fontsArray addObject:font];
    }
    NSLog(@"FontsArrayDescription:%@",[fontsArray description]);

输出结果是：

FontDescription：font-family：“Helvetica”; font-weight：normal; font-style：normal; font-size：18px

FontsArrayDescription：（

 "<UICFFont: 0x6e2d8b0> font-family: \"Helvetica\"; font-weight: normal; font-style: normal; font-size: 18px",
 "<UICFFont: 0x6e2d8b0> font-family: \"Helvetica\"; font-weight: normal; font-style: normal; font-size: 18px",
 "<UICFFont: 0x6e2d8b0> font-family: \"Helvetica\"; font-weight: normal; font-style: normal; font-size: 18px",
 "<UICFFont: 0x6e2d8b0> font-family: \"Helvetica\"; font-weight: normal; font-style: normal; font-size: 18px",
 "<UICFFont: 0x6e2d8b0> font-family: \"Helvetica\"; font-weight: normal; font-style: normal; font-size: 18px",    
 "<UICFFont: 0x6e2d8b0> font-family: \"Helvetica\"; font-weight: normal; font-style: normal; font-size: 18px",
 "<UICFFont: 0x6e2d8b0> font-family: \"Helvetica\"; font-weight: normal; font-style: normal; font-size: 18px",
 "<UICFFont: 0x6e2d8b0> font-family: \"Helvetica\"; font-weight: normal; font-style: normal; font-size: 18px",
 "<UICFFont: 0x6e2d8b0> font-family: \"Helvetica\"; font-weight: normal; font-style: normal; font-size: 18px",
 "<UICFFont: 0x6e2d8b0> font-family: \"Helvetica\"; font-weight: normal; font-style: normal; font-size: 18px"

）

所以我决定在课堂上使用相同的方法。

- (NSString *)description {
     NSString *descriptionString = [NSString stringWithFormat:@"Name: %@; Address: %@;", self.name, self.address];
     return descriptionString;

}

输出将是：

“姓名：Alex;地址：某地址;”

对象是自我。

objecsArrayDescription：（

 "Name:Alex; Address: some address;",
 "Name:Alex; Address: some address;",
 "Name:Alex; Address: some address;",
 "Name:Alex; Address: some address;",
 "Name:Alex; Address: some address;",
 "Name:Alex; Address: some address;",
 "Name:Alex; Address: some address;",
 "Name:Alex; Address: some address;",
 "Name:Alex; Address: some address;",
 "Name:Alex; Address: some address;"

）

对于一组对象。

如何为类编写正确的描述方法？

2 个答案: