BSPreloadTableVew

1. 一个实现了下拉刷新，上拉加载更多，上拉预加载功能的tableViw
2. 用的时候只要继承这个tableView即可实现上述功能，可以重写父类实现自定义样式。

效果

用法

1. pod 'BSPreloadTableVew'
2. 代码示例

- (void)viewDidLoad {
[super viewDidLoad];

self.pageSize = 20;
self.pageNum = 1;

[self setUpUI];

__weak typeof(self) weakeSelf = self;
[self.tableView setLoadNewData:^{
__strong typeof(weakeSelf) stongSelf = weakeSelf;
stongSelf.pageNum = 1;
[stongSelf fetchData];
}];
//    [self.tableView setLoadMoreData:^{
//        __strong typeof(weakeSelf) stongSelf = weakeSelf;
//        [stongSelf fetchData];
//    }];

[self.tableView preLoadDataThreshold4WithPageSize:self.pageSize initialPage:self.pageNum curPage:self.pageNum preLoadFetchBlk:^{
__strong typeof(weakeSelf) stongSelf = weakeSelf;
[stongSelf fetchData];
}];

[self showLoading];
[self fetchData];
}
- (void)fetchData{
NSDictionary *dict = @{
@"page":@(self.pageNum),
@"count":@(self.pageSize)
};
__weak typeof(self) weakeSelf = self;
[[BSRequestManager sharedInstance] postWithUrl:@"https://api.apiopen.top/getTangPoetry" args:dict finishBlk:^(NSDictionary * _Nonnull responseObject, NSError * _Nonnull error) {
__strong typeof(weakeSelf) stongSelf = weakeSelf;
[stongSelf.tableView endRefresh];
[stongSelf hideLoading];

if (error) {
[stongSelf.view makeToast:error.localizedDescription];
stongSelf.tableView.isPreLoadRefreshing = NO;
return ;
}

//请求成功
if (stongSelf.pageNum == 1){
NSArray *arrTemp = responseObject[@"result"];
stongSelf.arrMList = [NSMutableArray arrayWithArray:arrTemp];

if (stongSelf.arrMList.count == 0) {
//无数据缺省页

return ;
} else if (stongSelf.arrMList.count < stongSelf.pageSize) {
[stongSelf.tableView hideFooter];
stongSelf.tableView.isPreLoadLastPage = YES;
} else {
[stongSelf.tableView showFooter];
}
[stongSelf.tableView reloadData];
} else {
NSArray *arrTemp = responseObject[@"result"];
[stongSelf.arrMList addObjectsFromArray:arrTemp];

[stongSelf.tableView reloadData];

if (arrTemp.count < stongSelf.pageSize) {
stongSelf.tableView.isPreLoadLastPage = YES;
[stongSelf.tableView hideFooter];
} else {
[stongSelf.tableView showFooter];
}
}
stongSelf.pageNum ++;
stongSelf.tableView.isPreLoadRefreshing = NO;
}];
}

#pragma mark - UITableViewDelegate
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView{
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
return self.arrMList.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
UITableViewCell *cell = nil;

TableViewCellTest *cellTest = [self.tableView dequeueReusableCellWithIdentifier:@"TableViewCellTest"];
cellTest.data = self.arrMList[indexPath.row];

cell = cellTest;
return cell;
}

- (void)showLoading{
[MBProgressHUD showHUDAddedTo:self.view animated:YES];
}

- (void)hideLoading{
[MBProgressHUD hideHUDForView:self.view animated:YES];
}