ios - 从 NSArray 中删除重复的键值

Question

{
        ImageName = "http://192.168.1.8:9701/190214/190214_image2_08_13_2016_11_55_44.jpg";
        ImagePath = "<null>";
        ImageTypeId = 2;
    },
        {
        ImageName = "http://192.168.1.8:9701/190214/190214_image3_08_13_2016_11_55_45.jpg";
        ImagePath = "<null>";
        ImageTypeId = 3;
    },
        {
        ImageName = "http://192.168.1.8:9701/190214/190214_image4_08_13_2016_11_55_48.jpg";
        ImagePath = "<null>";
        ImageTypeId = 4;
    },
        {
        ImageName = "http://192.168.1.8:9701/190214/190214_image5_08_13_2016_11_55_51.jpg";
        ImagePath = "<null>";
        ImageTypeId = 5;
    },
        {
        ImageName = "http://192.168.1.8:9701/190214/190214_image6_08_13_2016_11_55_53.jpg";
        ImagePath = "<null>";
        ImageTypeId = 6;
    },
        {
        ImageName = "http://192.168.1.8:9701/190214/190214_image0_08_13_2016_06_15_21.jpg";
        ImagePath = "<null>";
        ImageTypeId = 0;
    },
        {
        ImageName = "http://192.168.1.8:9701/190214/190214_image1_08_13_2016_07_19_57.jpg";
        ImagePath = "<null>";
        ImageTypeId = 1;
    },
        {
        ImageName = "http://192.168.1.8:9701/190214/190214_image1_08_13_2016_07_19_57.jpg";
        ImagePath = "<null>";
        ImageTypeId = 1;
    }
)

我想删除所有键重复的对象 对于前。图像类型ID = 1;对象是两次，因此想要删除 1 个对象，并且仅删除一个 ImageTypeId = 1 的对象；

Answer 1

创建一个字典来保存值:

var dict = [NSObject: AnyObject]()

使用 typeid 作为键将每个项目添加到字典中:

for item in arr {
    guard let typeid = item["ImageTypeId"] as? NSObject else { continue }
    dict[typeid] = item
}

使用字典值创建一个数组:

let newarray = Array(dict.values)