@required
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section;
// Row display. Implementers should *always* try to reuse cells by setting each cell's reuseIdentifier and querying for available reusable cells with dequeueReusableCellWithIdentifier:
// Cell gets various attributes set automatically based on table (separators) and data source (accessory views, editing controls)
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath;
@optional
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView; // Default is 1 if not implemented
- (nullable NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section; // fixed font style. use custom view (UILabel) if you want something different
- (nullable NSString *)tableView:(UITableView *)tableView titleForFooterInSection:(NSInteger)section;
// Editing
// Individual rows can opt out of having the -editing property set for them. If not implemented, all rows are assumed to be editable.
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath;
// Moving/reordering
// Allows the reorder accessory view to optionally be shown for a particular row. By default, the reorder control will be shown only if the datasource implements -tableView:moveRowAtIndexPath:toIndexPath:
- (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath;
// Index
- (nullable NSArray<NSString *> *)sectionIndexTitlesForTableView:(UITableView *)tableView __TVOS_PROHIBITED; // return list of section titles to display in section index view (e.g. "ABCD...Z#")
- (NSInteger)tableView:(UITableView *)tableView sectionForSectionIndexTitle:(NSString *)title atIndex:(NSInteger)index __TVOS_PROHIBITED; // tell table which section corresponds to section title/index (e.g. "B",1))
// Data manipulation - insert and delete support
// After a row has the minus or plus button invoked (based on the UITableViewCellEditingStyle for the cell), the dataSource must commit the change
// Not called for edit actions using UITableViewRowAction - the action's handler will be invoked instead
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath;
// Data manipulation - reorder / moving support
- (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)sourceIndexPath toIndexPath:(NSIndexPath *)destinationIndexPath;
@end
实现行数代码
#import "JXItemsViewController.h"
#import "JXItem.h"
#import "JXItemStore.h"
@interface JXItemsViewController ()
@end
@implementation JXItemsViewController
- (instancetype)init {
// 调用父类的指定初始化方法
self = [super initWithStyle:UITableViewStylePlain];
if (self) {
for (NSInteger i=0; i<5; i++) {
[[JXItemStore sharedStore] createItem];
}
}
return self;
}
- (instancetype)initWithStyle:(UITableViewStyle)style {
return [self init];
}
- (void)viewDidLoad {
[super viewDidLoad];
}
#pragma mark - Table view data source
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return [[[JXItemStore sharedStore] allItem] count];
}
@end
