iOS去除数组中重复的model数据

    // 去除数组中model重复
    for (NSInteger i = 0; i < self.selectedModelArray.count; i++) {
        for (NSInteger j = i+1;j < self.selectedModelArray.count; j++) {
            AssistantModel *tempModel = self.selectedModelArray[i];
            AssistantModel *model = self.selectedModelArray[j];
            if ([tempModel.assistantId isEqualToString:model.assistantId]) {
                [self.selectedModelArray removeObject:model];
            }
        }
    }