Obj-c - 如何检查 NSString 是否包含一个或另一个？

Question

我想检查我的 NSString 'name' 是否包含 "Brittany" 或 "Bob"，但下面的代码似乎无法解决问题？

ViewController.m

NSPredicate *p = [NSPredicate predicateWithFormat:@"name contains[cd] %@ OR name contains[cd] %@", @"Brittany", @"Bob"];
NSArray *filtered = [self.messages filteredArrayUsingPredicate:p];

知道这应该是什么样子吗？我似乎无法正确使用语法。问题是 'filtered' 不返回字符串名称包含 "Bob" 的数组，只是返回名称包含 "Brittany" 的数组。

这是 self.messages 包含的内容：

 This is the messages data (
            {
            body = "Hi";
            endswaptime = "<null>";
            "first name" = Brittany;
            name = Brittany;
            nid = 1803;
            "node_title" = "Re:";
        },
            {
            body = "It is brittany";
            endswaptime = "<null>";
            "first name" = Brittany;
            name = Brittany;
            nid = 1804;
            "node_title" = "Re:";

        },
            {
            body = "Hellooo :)\n";
            endswaptime = "<null>";
            "first name" = Bob;
            name = "Bob";
            nid = 1805;
            "node_title" = "Re:";


        }
    )

Answer 1

也许将谓词拆分为两个单独的谓词并与 NSCompoundPredicate 结合会有帮助？

NSPredicate *p1 = [NSPredicate predicateWithFormat:@"name contains[cd] %@", @"Brittany"];
NSPredicate *p2 = [NSPredicate predicateWithFormat:@"name contains[cd] %@", @"Bob"];
NSCompoundPredicate *p = [NSCompoundPredicate orPredicateWithSubpredicates:@[p1, p2]];
NSArray *filtered = [self.messages filteredArrayUsingPredicate:p];

Answer 2

我用swift语言写的。尝试转换成 Objective c。 var str = ["Hello", "hel","hello"]

let predicate1 = NSPredicate(格式: "SELF contains %@","Hello") let predicate2 = NSPredicate(格式: "SELF contains %@","helo") let predicatecompound = NSCompoundPredicate.init(type: .or, subpredicates: [predicate1,predicate2]) print(str.filter { predicatecompound.evaluate(with: $0) })

参考： Combining 'AND' and 'OR' Condition in NSPredicate

Obj-c - 如何检查 NSString 是否包含一个或另一个？

Obj-c - How can I check if NSString contains one OR the other?

objective-c

nspredicate