ios 使用 NSPredicate 使用字典过滤数组
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时间：2020-08-30 19:50:01 来源:igfitidea点击:
Filter Array with dictionaries using NSPredicate
提问by lu yuan
There is an Array with each element being a NSDictionary.
有一个数组，每个元素都是一个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];
How to filer the arrwith name or email contains string @"filter string"by using filterArrayUsingPredicate:method.
如何使用方法过滤arr姓名或电子邮件包含字符串。@"filter string"filterArrayUsingPredicate:
Thanks in advance!
提前致谢！
回答by Nitin
Please see the below example:
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"]];
回答by Sachin Nikumbh
Check this out :
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(##代码##) };
println("names = ,\(filteredArray)");
