UITableView详解(UITableViewCell(四) 增加 删除 移动)
最后更新于：2022-04-01 06:58:45
~~~
@implementation HMTAppDelegate
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
// Override point for customization after application launch.
self.window.backgroundColor = [UIColor whiteColor];
HMTRootViewController * rootRC = [[HMTRootViewController alloc]init];
UINavigationController * rootNC = [[UINavigationController alloc]initWithRootViewController:rootRC];
self.window.rootViewController = rootNC;
[self.window makeKeyAndVisible];
return YES;
}
#import <UIKit/UIKit.h>
@interface HMTRootViewController : UIViewController<UITableViewDelegate,UITableViewDataSource>{
int i ;
}
@property (nonatomic,retain)NSMutableArray * iPhoneArrays;
@property (nonatomic,retain)UITableView * iPhoneTableView;
@end
#import "HMTRootViewController.h"
@interface HMTRootViewController ()
@end
@implementation HMTRootViewController
-(void)dealloc{
RELEASE_SAFELY(_allGroupArray);
RELEASE_SAFELY(_iPhoneTableView);
[super dealloc];
}
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
_iPhoneArrays = [[NSMutableArray alloc]init];
i = 0;
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
// 灵活运用数组
// 一个区的每一行数据(小数组)
NSArray * array1 = [NSArray arrayWithObjects:@"中国",@"日本",@"韩国", nil];
NSArray * array2 = [NSArray arrayWithObjects:@"德国",@"英国",@"法国",@"瑞士", nil];
NSArray * array3 = [NSArray arrayWithObjects:@"美国",@"俄罗斯",@"墨西哥", nil];
// 每一个区的数据(大数组)
self.iPhoneArrays = [NSMutableArray arrayWithObjects:array1,array2,array3, nil];
// 建立一个表单视图
self.iPhoneTableView = [[UITableView alloc]initWithFrame:CGRectMake(0, 0, 320, self.view.bounds.size.height - 44)
style:UITableViewStyleGrouped];
_iPhoneTableView.separatorColor = [UIColor redColor];
_iPhoneTableView.delegate = self;
_iPhoneTableView.dataSource = self;
[self.view addSubview:_iPhoneTableView];
/*
UIBarButtonItem * rightButton = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemEdit
target:self action:@selector(didClickRightBarButtonItemAction:)];
self.navigationItem.rightBarButtonItem = rightButton;
*/
// 用系统定义好的一个edit按钮
self.navigationItem.rightBarButtonItem = self.editButtonItem;
self.editButtonItem.title = @"编辑";
// Do any additional setup after loading the view.
}
#pragma mark - 设置编辑环境,开启/关闭
// 系统自带按钮
- (void)setEditing:(BOOL)editing animated:(BOOL)animated{
[super setEditing:editing animated:animated];
#pragma mark 推荐这种写法
self.editButtonItem.title = editing?@"完成":@"编辑";
[_listTableView setEditing:editing animated:animated];
NSLOG_FUNCTION;
}
// 自定义编辑按钮
- (void)didClickRightBarButtonItemAction:(UIBarButtonItem *)rightButton{
if (_isEditing) {
_isEditing = NO;
rightButton.title = @"编辑";
} else {
_isEditing = YES;
rightButton.title = @"完成";
}
// 熟悉这种写法
//_isEditing = !_isEditing;
[_listTableView setEditing:_isEditing animated:YES];
}
#pragma mark - 数据设置
// 设置分区
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView{
return [_iPhoneArrays count];
}
// 设置每个分区的行数
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
return [[_iPhoneArrays objectAtIndex:section] count];
}
// cell的具体实现和设置
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
static NSString * celldentifier = @"cell";
UITableViewCell * cell = [tableView dequeueReusableCellWithIdentifier:celldentifier];
if (!cell) {
cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:celldentifier];
i++;NSLog(@" ------%i---------",i);
}
cell.textLabel.text = [[_iPhoneArrays objectAtIndex:indexPath.section] objectAtIndex:indexPath.row];
return cell;
}
- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section{
if (section == 0) {
return @"亚洲";
} else if (section == 1){
return @"欧洲";
}else
return @"北美洲";
}
// cell被选中
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
// 取消选中后显示的高亮状态,也就是只在选中的那一刻出现高亮
[tableView deselectRowAtIndexPath:indexPath animated:YES];
}
#pragma mark - 数据编辑Edit 删除/添加
#pragma mark 询问具体到某一区某一行能否被编辑(删除/添加)
// 询问能否被编辑 ----- 系统默认全部cell能编辑,这个方法能够让你设置具体到哪一行哪一列
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath{
return YES;
}
#pragma mark 返回编辑样式,是添加还是删除
- (UITableViewCellEditingStyle)tableView:(UITableView *)tableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath{
// 第3个分区进行增加操作
if (indexPath.section == 2) {
return UITableViewCellEditingStyleInsert;
}
// 其余分区进行删除操作
return UITableViewCellEditingStyleDelete;
}
#pragma mark 最后编辑操作(单纯的设置这个方法,cell向左滑动会出现delete操作,短信.微信.QQ都是此操作)
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath{
// 判断状态
// 删除数据
if (editingStyle == UITableViewCellEditingStyleDelete) {
// 做判断,如果
if ([deletaArray count] > 1) {
// 先删除数据
[[_iPhoneArrays objectAtIndex:indexPath.section] removeObjectAtIndex:indexPath.row];
// 删除cell(指定行)
[tableView deleteRowsAtIndexPaths:[NSArray arrayWithObjects:[NSIndexPath indexPathForRow:indexPath.row inSection:indexPath.section], nil]
withRowAnimation:UITableViewRowAnimationLeft];
//[tableView deleteRowsAtIndexPaths:[NSArray arrayWithObjects:indexPath, nil] withRowAnimation:UITableViewRowAnimationLeft];
}else{
// 直接移除掉整个数组
[_iPhoneArrays removeObjectAtIndex:indexPath.section];
// 删除整个分区
[tableView deleteSections:[NSIndexSet indexSetWithIndex:indexPath.section] withRowAnimation:UITableViewRowAnimationLeft];
}
}
// 添加数据
if (editingStyle == UITableViewCellEditingStyleInsert) {
NSString * text = @"天空之城";
// 先添加数据源
[[_iPhoneArrays objectAtIndex:indexPath.section] addObject:addCellText];
// 自定义要插入的行数(indexPath.row + ?(?>0) ?是几就代表添加的数据会出现在+号下面的几个位置处 ?为0就会出现在点击加号那一行的上面)
NSIndexPath * selfIndexPath = [NSIndexPath indexPathForRow:indexPath.row+1 inSection:indexPath.section];
[tableView insertRowsAtIndexPaths:[NSArray arrayWithObject:selfIndexPath] withRowAnimation:UITableViewRowAnimationLeft];
}
}
#pragma mark - 数据编辑Edit 移动
#pragma mark 询问具体到某一区某一行能否被编辑(移动)
// 询问能否被移动(参数indexPath作用:指点哪些区哪些行能够移动或者不能够移动)
- (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath{
return YES;
}
#pragma mark 设置能否被移动
- (NSIndexPath *)tableView:(UITableView *)tableView targetIndexPathForMoveFromRowAtIndexPath:(NSIndexPath *)sourceIndexPath toProposedIndexPath:(NSIndexPath *)proposedDestinationIndexPath{
// 一般,移动都是发生在同区之间,数据在不同区之间移动,那么数据一开始就应该不会编辑到一个区
if (sourceIndexPath.section == proposedDestinationIndexPath.section) {
// 允许移动(目的地)
return proposedDestinationIndexPath;
}else{
// 不允许移动(源始地)
return sourceIndexPath;
}
}
#pragma mark 完成最后移动,主要操作数据就行(注:移动并不是交换,移动看看就知道了,移动到一个位置,原先所有的cell会自动向下)
- (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)sourceIndexPath toIndexPath:(NSIndexPath *)destinationIndexPath{
// 取得要移动的数据
NSString * moveString = [[_iPhoneArrays objectAtIndex:sourceIndexPath.section] objectAtIndex:sourceIndexPath.row];
// 移动到目的地
[[_iPhoneArrays objectAtIndex:sourceIndexPath.section] insertObject:moveString atIndex:destinationIndexPath.row];
// 删除源始地的数据
[[_iPhoneArrays objectAtIndex:sourceIndexPath.section] removeObjectAtIndex:sourceIndexPath.row];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
~~~