MVVM模式，废话不多上代码：

Swift——基础简易版本

Swift——RxSwift进阶

OC——基础简易版本

1,-Model

@interface M_NewsList : NSObject
@property (nullable, nonatomic, strong) NSString* CategoryId;
@property (nullable, nonatomic, strong) NSString* NewsCommentNum;
@property (nullable, nonatomic, strong) NSString* NewsId;
@property (nullable, nonatomic, strong) NSString* NewsSummary;
@property (nullable, nonatomic, strong) NSString* NewsUrl;
@property (nullable, nonatomic, strong) NSString* Time;
@property (nullable, nonatomic, strong) NSString* Title;
@property (nullable, nonatomic, strong) NSString* Type;
@property (nullable, nonatomic, strong) NSString* moretitle;
@end

2,-VM

@interface VM_NewsList : NSObject
- (void)getNewsList:(BOOL)refresh;

@property (nonatomic, copy, readonly) __block NSMutableArray *news;
@property (nonatomic, copy) __block void (^newsListBlock)(void);
//RAC
@property (nonatomic, strong, readonly) RACCommand *requestCommand;
@end
/**************** .m ********************/
#import "VM_NewsList.h"
#import "M_NewsList.h"

@interface VM_NewsList()
{
    NSInteger page;
}
@end
@implementation VM_NewsList
- (instancetype)init
{
    self = [super init];
    if (self) {
        page = 1;
        _news = [NSMutableArray array];
    }
    return self;
}

- (void)getNewsList:(BOOL)refresh{
    page = refresh ? 1 : page + 1;
    __weak typeof(self) weakSelf = self;
    [My_API getNewsList:@{@"page":[NSString stringWithFormat:@"%ld",(long)page],
                          @"type":@"1",
                          @"processID":@"getNewsList"}
                  block:^(BOOL isOk, id data, NSString *msg) {
                      if (page == 1) {[_news removeAllObjects];};
                      NSLog(@"%@",data);
                      if ([data isKindOfClass:[NSArray class]]) {
                          [data enumerateObjectsUsingBlock:^(id  _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
                              M_NewsList * model = [M_NewsList modelWithDictionary:obj];
                              [weakSelf.news addObject:model];
                          }];
                      }
                      if (weakSelf.newsListBlock) {
                          weakSelf.newsListBlock();
                      }
                  }];
}

3,-ViewController

@interface NewsList ()
@property (nullable, nonatomic, strong) VM_NewsList* vm_datas;
@end

@implementation NewsList
- (VM_NewsList*)vm_datas{
    if (!_vm_datas) {
        _vm_datas = [[VM_NewsList alloc] init];
    }
    return _vm_datas;
}
- (void)viewDidLoad {
    [super viewDidLoad];
    
    __weak __typeof(self) weakSelf = self;
    self.vm_datas.newsListBlock = ^{
        [weakSelf.tableView.mj_header endRefreshing];
        [weakSelf.tableView.mj_footer endRefreshing];
        [weakSelf.tableView reloadData];
    };
    [self addRefresh];
}

- (void)addRefresh{
    __weak typeof(self) weakSelf = self;
    self.tableView.mj_header = [MJRefreshNormalHeader headerWithRefreshingBlock:^{
        [weakSelf.vm_datas getNewsList:YES];
    }];
    
    self.tableView.mj_footer = [MJRefreshBackNormalFooter footerWithRefreshingBlock:^{
        [weakSelf.vm_datas getNewsList:NO];
    }];
    
    [self.tableView.mj_header beginRefreshing];
    self.tableView.mj_footer.automaticallyHidden = YES;
}

OC——RAC进阶版本