ios - 在 Swift 中搜索数组对象

Question

我有一个餐厅数组，这些餐厅是具有名称、类型、位置等的对象。我如何才能只搜索餐厅名称或位置而不搜索整个数组对象？

例如我的数组有 2 个 Restaurant 对象。我只想搜索 Name 是否包含“United”。如果我搜索整个对象，两者都会因为国家/地区而出现。

[<Restaurant: 0x7fcb0ad80950, objectId: LA74J92QDA, localId: (null)> {
    City = "New York";
    Country = "United States";
    Name = United Bakery;
    RestaurantLoc = "<PFGeoPoint: 0x7fcb0af6cbc0, latitude: 40.759212, longitude: -73.984632>";
    State = NY;
    Street = "1 main st.";
    Zipcode = 10055;
}, <Restaurant: 0x7fcb0af6cfc0, objectId: 0aKFrpKN46, localId: (null)> {
    City = "New York";
    Country = "United States";
    Name = Wendys Bakery;
    RestaurantLoc = "<PFGeoPoint: 0x7fcb0af6cd60, latitude: 40.759210, longitude: -73.984631>";
    State = NY;
    Street = "1 main st.";
    Zipcode = 10055;
}]

这是创建对象数组的 block :

            let userGeoPoint = currentLocGeoPoint
            var query = PFQuery(className:"Restaurant")
            query.whereKey("RestaurantLoc", nearGeoPoint:userGeoPoint, withinMiles:50)
            query.limit = 2

            query.findObjectsInBackgroundWithBlock {
                (object: [AnyObject]!, error: NSError!) -> Void in
                if object != nil {
                    println(object)
                } else {
                    println("The getObject request failed with error: \(error)")
                }
            }

Answer 1

您可以使用filteredArrayUsingPredicate。这是一个小例子:

NSString *searchString = @"a";
NSArray *filteredProducts = [products filteredArrayUsingPredicate:[NSPredicate predicateWithFormat:@"title CONTAINS[cd] %@", searchString]];

swift :

let searchString = "text_to_search"
let predicate = NSPredicate(format: "title CONTAINS[cd] %@", searchString);
let filteredArray = array.filteredArrayUsingPredicate(predicate!);