Question

我使用以下代码将逗号分隔的字符串转换为数组。

NSString *domanIdStr = [Settings getSetting:@"selectedDomainId"];
NSLog(@"%@",domanIdStr);
NSArray *domainIds = [domanIdStr componentsSeparatedByString:@","];

NSLog(@"%@",domanIdStr);打印

(
    "1,2"
)

但是第三行componentsSeparatedByString会引发以下错误，

[__NSCFArray componentsSeparatedByString:]: unrecognized selector sent to instance 0x1702650c0

我怎样才能解决这个问题？

Answer 1

NSLog(@"%@",domanIdStr);打印

(
    "1,2"
)

domanIdStr不是字符串，而是数组。因此，要正确获取domanIdStr，请使用此

NSArray * domanIdStr = [Settings getSetting:@"selectedDomainId"];
NSString *firstTag = domanIdStr[0]; //this would be "1"

或者如果你想提取，那么就像

一样

 NSArray *domanIdStr = [Settings getSetting:@"selectedDomainId"];
 NSString *getString = domanIdStr[0];
NSArray *domainIds = [getString componentsSeparatedByString:@","];
NSLog(@"%@",domanIdStr[0]);

Answer 2

使用以下

替换您的代码

NSArray *domanIdStr = [Settings getSetting:@"selectedDomainId"];
NSString *str = domanIdStr[0];
NSArray *domainIds = [str componentsSeparatedByString:@","];

Answer 3

你正在获取关键字selectedDomainId的数组，如果你得到一个字符串，那么问题将被解决。

无法将逗号分隔的字符串转换为数组

3 个答案: