Question

嗨，我最近在开发过程中遇到了一个奇怪的问题。本机包含无法正常工作。下面是我的代码。

struct Hello {
    var name : String = ""
    var address: String = ""
    var phone : String = ""

    init(name: String,address: String,phone: String) {
        self.name = name
        self.address = address
        self.phone = phone
    }
}


struct Buddy {
    var phone : String = ""
    var name: String = ""
    var address: String = ""

    init(name: String,address: String,phone: String) {
        self.name = name
        self.address = address
        self.phone = phone
    }
}


var a: [Hello] = []
a.append(Hello(name: "Gaurav", address: "Address1", phone: "123456"))
a.append(Hello(name: "Kumar", address: "Address2", phone: "123457"))
a.append(Hello(name: "Singh", address: "Address3", phone: "123"))


var b: Buddy = Buddy(name: "Pawan", address: "Address1", phone: "123")
if (a.contains(where: { $0.phone != b.phone})) {
    print("doest not contain")
} else {
    print(" contain")
}

实际结果：打印（“不包含”）

预期结果： print（“包含”）

Answer 1

代码正确。

您正在检查

a是否包含一个Hello，其电话号码为不是 123。

这是true，因为甚至有两个项目的电话号码不同

Answer 2

将最后一部分更改为：

if (a.contains(where: { $0.phone == b.phone})) {
    print("contains")
} else {
    print("does not contain")
}

，它将返回正确的值。

数组包含方法不适用于自定义模型和谓词

2 个答案: