UITableView

来源：互联网发布：vfp中关闭数据库的命令编辑：程序博客网时间：2024/05/16 19:28

tabview列表样式:

UITableViewStylePlain--不分组

UITableViewStyleGrouped--分组

numberOfSectionlInTableView--Section的数量

每个section的页眉和页尾--数据源的方法:tableView:titleForHeaderInSection, tableView:titleFooterInSection

返回字符串,默认是nil

页眉和页尾的视图:

tableView:viewForHeaderInSection,

tableView:viewFooterInSection

页眉和页尾的高度是默认由自表自身决定的,该表有两个属性:sectionHeaderHeght,sectionFooterHeight;可以通过委托方法来覆盖:tableView:heightForHeaderInSection,tableVive:heightForFooterInSection;

一般在UITableViewController的子类上进行UItableViewDelegate上的操作和UITableViewDataSource上的数据操作;

必须要实现的方法:

1.每个section有固定的行数的话就用:- (NSInteger)tableView:(UITableView *)tableView numberOfRpwsInSection:(NSInteger)section;

2.必须要实现的,返回某一行的cell数据-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath;

NSIndexPath可以确定表单元的位置(section和row)

表视图的section返回0时表示没有数据,会阻止表视图的其他请求;

cell重用会调用次方法:

(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath;

{

UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@”MyIdentifier”];

if(cell == nil)

{

cell = [[UITabelView alloc]initWithStyle:... reuseIdentifier:@””
}

}

(void)viewWillAppear:(BOOL)animated

{

[super viewWillAppear;animated];

[self.tableView reloadData];

}

视频笔记:

无格式表视图和分段表视图(普通,分组,索引)

每一行叫做单元格,可以放置控件.

封装成属性.

选中单元格后触发的方法:

-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath

// RootViewController.m

// 20-02

// Created by IT小怪才 on 12-11-2.

#import "RootViewController.h"

#import "item.h"

@interfaceRootViewController ()

@end

@implementation RootViewController

@synthesize tableView;

@synthesize items;

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil

{

self = [superinitWithNibName:nibNameOrNilbundle:nibBundleOrNil];

if (self) {

// Custom initialization

}

returnself;

}

- (void)viewDidLoad

{

[superviewDidLoad];

// Do any additional setup after loading the view.

items = [[NSMutableArrayalloc]initWithCapacity:20];

tableView = [[UITableViewalloc]initWithFrame:CGRectMake(0,0,320,460)style:UITableViewStyleGrouped];

tableView.delegate =self;

tableView.dataSource = self;

[self.viewaddSubview:tableView];

item *msg;

msg = [[itemalloc]init];

msg.text =@"小葱拌豆腐";

msg.checked =NO;

[itemsaddObject:msg];

msg = [[itemalloc]init];

msg.text =@"木桶饭";

msg.checked =YES;

[itemsaddObject:msg];

msg = [[itemalloc]init];

msg.text =@"姜汁松花蛋";

msg.checked =YES;

[itemsaddObject:msg];

msg = [[itemalloc]init];

msg.text =@"麻辣香锅";

msg.checked =NO;

[itemsaddObject:msg];

msg = [[itemalloc]init];

msg.text =@"练字!!!";

msg.checked =NO;

[itemsaddObject:msg];

UIBarButtonItem *button = [[UIBarButtonItemalloc]initWithBarButtonSystemItem:UIBarButtonSystemItemAddtarget:selfaction:@selector(Clicked:)];

self.navigationItem.rightBarButtonItem = button;

}

- (void) Clicked:(id)sender {

int newRowIndex = [itemscount];

item *msg = [[itemalloc]init];

msg.text =@"老大,我是新来的!";

msg.checked =NO;

[itemsaddObject:msg];

NSIndexPath *indexPath = [NSIndexPathindexPathForRow:newRowIndexinSection:0];

//此方法需要行切入以及Section.

NSArray *indexPaths = [NSArrayarrayWithObject:indexPath];

//打包成数组

[self.tableViewinsertRowsAtIndexPaths:indexPathswithRowAnimation:UITableViewRowAnimationAutomatic];

//添加到界面上

}

- (BOOL) tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath {

returnYES;

}

- (BOOL) tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath {

returnYES;

}

- (void) tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {

[itemsremoveObjectAtIndex:indexPath.row];

NSArray *indexPaths = [NSArrayarrayWithObject:indexPath];

[tableView deleteRowsAtIndexPaths:indexPathswithRowAnimation:UITableViewRowAnimationAutomatic];

//此方法需要传入删除的cell的坐标;

}

- (NSInteger) tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {

return [itemscount];

}

- (float) tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {

return50.0f;

}

- (UITableViewCell *) tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {

staticNSString *cellName =@"Cell";

UITableViewCell *cell = [tableViewdequeueReusableCellWithIdentifier:cellName];

if (cell ==nil) {

cell = [[[UITableViewCellalloc]initWithStyle:UITableViewCellStyleDefaultreuseIdentifier:cellName]autorelease];

}

item *msg = [itemsobjectAtIndex:indexPath.row];

[selfconfigureTextForCell:cellwithChecklistItem:msg];

[selfconfigureCheckmarkForCell:cellwithChecklistItem:msg];

return cell;

}

//每行的数据赋值

- (void)configureTextForCell:(UITableViewCell *)cell withChecklistItem:(item *)item {

cell.textLabel.text = item.text;

}

- (void)configureCheckmarkForCell:(UITableViewCell *)cell withChecklistItem:(item *)item {

if (item.checked) {

cell.accessoryType =UITableViewCellAccessoryCheckmark;

} else {

cell.accessoryType =UITableViewCellAccessoryNone;

}

//选中函数

- (void) tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {

UITableViewCell *cell = [tableViewcellForRowAtIndexPath:indexPath];

item *msg = [itemsobjectAtIndex:indexPath.row];

[msg toggleChecked];//取反函数

[selfconfigureCheckmarkForCell:cellwithChecklistItem:msg];

[tableView deselectRowAtIndexPath:indexPathanimated:YES];

}

- (void)didReceiveMemoryWarning

{

[superdidReceiveMemoryWarning];

// Dispose of any resources that can be recreated.

}

@end

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