objective-c - NSPredicate 用于评估字符串

Question

如何使用 评估字符串NSPredicate？

我已经使用NSPredicateControl和字符串操作来获得类似N92 BEGINSWITH[cd] "n". 我想对此进行评估以获得真/假值。我怎么得到它？有什么建议么 ？

Answer 1

尝试这个：-

NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF BEGINSWITH[cd]%@", @"n"];
NSString *yourValue=@"nndfj";
BOOL result = [predicate evaluateWithObject:yourValue];
if (result ==YES)
{
    NSLog(@"Word begin with n");
}
else{
    NSLog(@"Word does not begin with n");
}