使用NSPredicate与字典过滤数组

有一个数组，每个元素是一个NSDictionary 。

 NSMutableArray *mutArr = [NSMutableArray array]; for (Person *person in persons) { NSDictionary *dict = [[NSDictionary alloc] initWithObjectsAndKeys:person.name, @"name", person.email, @"email", nil]; [mutArr addObject:dict]; } self.arr = [[NSArray alloc] initWithArray:mutArr]; 

如何使用名称或电子邮件包含string@"filter string"通过使用filterArrayUsingPredicate:方法。

提前致谢！

Answer 1

请看下面的例子：

  NSArray *array = [NSArray arrayWithObject:[NSMutableDictionary dictionaryWithObject:@"filter string" forKey:@"email"]]; // you can also do same for Name key... NSArray *filteredarray = [array filteredArrayUsingPredicate:[NSPredicate predicateWithFormat:@"(email == %@)", @"filter string"]]; 

Answer 2

看一下这个 ：

 var customerNameDict = ["firstName":"karthi","LastName":"alagu","MiddleName":"prabhu"]; var clientNameDict = ["firstName":"Selva","LastName":"kumar","MiddleName":"m"]; var employeeNameDict = ["firstName":"karthi","LastName":"prabhu","MiddleName":"kp"]; var attributeValue = "karthi"; var arrNames:Array = [customerNameDict,clientNameDict,employeeNameDict]; var namePredicate = NSPredicate(format: "firstName like %@",attributeValue); let filteredArray = arrNames.filter { namePredicate.evaluateWithObject($0) }; println("names = ,\(filteredArray)");