iOS 数组中的模型去重

              NSMutableDictionary *mutableDic = [NSMutableDictionary dictionary];
                
                for (HomeRectProductModel *model in self.modelArr) {
                    [mutableDic setValue:model forKey:model.Id];
                }
                [self.modelArr removeAllObjects];
                self.modelArr = [[mutableDic allValues] mutableCopy];





                //  方法二 去除数组中model重复 
                for (NSInteger i = 0; i < self.productModelArr.count; i++) {
                    for (NSInteger j = i+1;j < self.productModelArr.count; j++) {
                        HomeRectProductModel *tempModel = self.productModelArr[i];
                        HomeRectProductModel *model = self.productModelArr[j];
                        if ([tempModel.Id isEqualToString:model.Id]) {
                            [self.productModelArr removeObject:model];
                        }
                    }
                }