UITableView

UITableView

創(chuàng)建UITableView

  • 代碼

  • 使用Masonry布局

  • storyboard

    • 動態(tài)單元格記得使用唯一標識符a
    • xib和storyboard差不多

    注意點：循環(huán)利用 有if就有else

刷新數(shù)據(jù)

  • 全局刷新
[self.table reloadData];
  • 局部刷新
    • 添加(帶動畫)
 [self.wineArr insertObject:wine atIndex:0];
    NSArray *indepath = @[[NSIndexPath indexPathForRow:0 inSection:0]];
    [self.table insertRowsAtIndexPaths:indepath withRowAnimation:UITableViewRowAnimationRight];
  • 刪除(帶動畫)
    NSArray *delate =@[[NSIndexPath indexPathForRow:0 inSection:0]];
    [self.table deleteRowsAtIndexPaths:delate withRowAnimation:UITableViewRowAnimationMiddle];
  • 刷新(帶動畫)
NSArray *update =@[[NSIndexPath indexPathForRow:0 inSection:0]];
    [self.table reloadRowsAtIndexPaths:update withRowAnimation:UITableViewRowAnimationMiddle];

左劃刪除

#pragma make - UITbaleViewDalegate
/** 只要有這個方法就會出現(xiàn)向左劃就會出現(xiàn)刪除按鈕，點擊按鈕會調(diào)用這個方法(iOS9以前一定要調(diào)用這個方法才會出現(xiàn)，但是在iOS9后只要調(diào)用下面的方法一樣可以出現(xiàn)按鈕)*/
-(void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
    [self.wineArr removeObjectAtIndex:indexPath.row];
    NSArray *delate =@[
                       [NSIndexPath indexPathForRow:indexPath.row inSection:indexPath.section]
                       ];
    [self.table deleteRowsAtIndexPaths:delate withRowAnimation:UITableViewRowAnimationMiddle];
}
/** 這個方法返回的字符串是你要現(xiàn)實在左劃按鈕上面顯示的字，如何和下面方法同時存在下面方法優(yōu)先級更高*/
-(NSString *)tableView:(UITableView *)tableView titleForDeleteConfirmationButtonForRowAtIndexPath:(NSIndexPath *)indexPath
{
    return @"刪除";
}



//自定義左劃的按鈕
-(NSArray<UITableViewRowAction *>*)tableView:(UITableView *)tableView editActionsForRowAtIndexPath:(NSIndexPath *)indexPath

{
    //這是代表一個按鈕 block里面的代碼是點擊這個按鈕之后會執(zhí)行的操作
    UITableViewRowAction *action1 = [UITableViewRowAction rowActionWithStyle:UITableViewRowActionStyleDefault title:@"刪除a" handler:^(UITableViewRowAction * _Nonnull action, NSIndexPath * _Nonnull indexPath) {
        //和上面刪除的方法相同代碼
        [self.wineArr removeObjectAtIndex:indexPath.row];
        NSArray *delate =@[
                           [NSIndexPath indexPathForRow:indexPath.row inSection:indexPath.section]
                           ];
        [self.table deleteRowsAtIndexPaths:delate withRowAnimation:UITableViewRowAnimationMiddle];
        
    }];
    
    UITableViewRowAction * action2 = [UITableViewRowAction rowActionWithStyle:UITableViewRowActionStyleNormal title:@"關(guān)注" handler:^(UITableViewRowAction * _Nonnull action, NSIndexPath * _Nonnull indexPath) {
        //這個方法只是展示用，現(xiàn)在不推薦使用
        UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"謝謝關(guān)注" message:@"??" delegate:nil cancelButtonTitle:@"關(guān)閉" otherButtonTitles:nil, nil];
        alert.show;
        //推出編輯模式
        self.table.editing = NO;
    }];
    
    //先加的按鈕在右邊
    return @[action1,action2];
}

編輯模式

    //讓tabel進入編輯模式
    //取反 是編輯模式久讓它變成不是 否則相反
    self.table.editing = !self.table.editing;
    //帶動畫的方法
    [self.table setEditing:!self.table.isEditing animated:YES];

多行編輯模式下的刪除

- (void)viewDidLoad {
    [super viewDidLoad];
   
    //讓批量刪除可以多選,默認有一個樣式
    self.table.allowsMultipleSelectionDuringEditing = YES;
    //刪除按鈕狀態(tài)
    self.ddd.enabled = NO;

}
//批量刪除按鈕
- (IBAction)remove {
    
    //讓tabel進入編輯模式
    //取反 是編輯模式久讓它變成不是 否則相反
    //self.table.editing = !self.table.editing;
    //帶動畫的方法
    [self.table setEditing:!self.table.isEditing animated:YES];
    self.ddd.enabled = !self.ddd.enabled;
    
}
//刪除按鈕
- (IBAction)deleate {
    //零時數(shù)組保存數(shù)據(jù)
    NSMutableArray *tempArr = [NSMutableArray array];
    //注意:千萬不要一邊遍歷數(shù)組，一邊操作這個數(shù)組，因為數(shù)組中的索引會一直發(fā)生變化
    for (NSIndexPath *indexpath in self.table.indexPathsForVisibleRows) {
        [tempArr addObject:self.wineArr[indexpath.row]];
    }
    //在數(shù)據(jù)源中把用戶選擇的數(shù)據(jù)刪除
    [self.wineArr removeObjectsInArray:tempArr];
    //tableVieW刪除這些列表
    [self.table deleteRowsAtIndexPaths:self.table.indexPathsForVisibleRows withRowAnimation:UITableViewRowAnimationAutomatic];
    
}
1.png

自定義編輯模式多選的按鈕

首先模型中增加一個屬性

@property(assign,nonatomic,getter=ischeck)BOOL check;

讓后自定義cell中重寫方法

//重寫initWithStyle方法
- (instancetype)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier
{
    if (self = [super initWithStyle:style reuseIdentifier:reuseIdentifier]) {
     
        UIImageView *checkImage = [[UIImageView alloc]init];
        checkImage.image = [UIImage imageNamed:@"check"];
        checkImage.hidden = YES;
        [self.contentView addSubview:checkImage];
        self.check = checkImage;
    }
    return self;
}
//布局子控件
- (void)layoutSubviews
{
    [super layoutSubviews];
    CGFloat WH = 24;
    CGFloat X = self.contentView.frame.size.width - WH- 10;
    CGFloat Y = (self.contentView.frame.size.height - WH)*0.5;
    self.check.frame = CGRectMake(X, Y, WH, WH);
}
//設(shè)置數(shù)據(jù)
- (void)setWine:(Wine *)wine
{
    _wine = wine;
    self.imageView.image = [UIImage imageNamed:wine.image];
    self.textLabel.text = wine.name;
    self.detailTextLabel.text = wine.money;
    //根據(jù)傳進來的模型判斷是否顯示打勾的圖片
    if (wine.ischeck) {
        self.check.hidden = NO;
    }else
    {
        self.check.hidden = YES;
    }
}

重點就是聲明一個數(shù)組，用來保存用戶選取的哪個

/** 用戶選取要刪除的數(shù)組*/
@property(strong,nonatomic)NSMutableArray *SelectArr;


//懶加載
- (NSMutableArray *)SelectArr
{
    if (!_SelectArr) {
        _SelectArr = [NSMutableArray array];
    }
    return _SelectArr;
}



#pragma mark - UITableViewDalegate
//監(jiān)聽用戶選點擊了哪一行
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    Wine *wine = self.WineArr[indexPath.row];
    if (wine.ischeck) {
        wine.check = NO;
        [self.SelectArr removeObject:indexPath];
       
     }else{
        wine.check = YES;
        [self.SelectArr addObject:indexPath];
        
    }
    NSLog(@"%@",indexPath);
    [tableView reloadRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationFade];
}

//刪除方法
- (IBAction)deleate {
    NSMutableArray *tempArr = [NSMutableArray array];
    
    for (NSIndexPath *indexpatha in self.SelectArr) {
        [tempArr addObject:self.WineArr[indexpatha.row]];
    }
    //刪除數(shù)據(jù)源中的數(shù)據(jù)
    [self.WineArr removeObjectsInArray:tempArr];
    
    [self.Tabel deleteRowsAtIndexPaths:self.SelectArr withRowAnimation:UITableViewRowAnimationAutomatic];
    //重置數(shù)組為
    [self.SelectArr removeAllObjects];
    
}

通知

- (void)viewDidLoad {
    [super viewDidLoad];
    
    //監(jiān)聽通知
    NSNotificationCenter *Notice = [NSNotificationCenter defaultCenter];
    [Notice addObserver:self selector:@selector(countAdd:) name:@"AddCount" object:nil];
    [Notice addObserver:self selector:@selector(countRemove:) name:@"RemoveCount" object:nil];
    
}
//在銷毀前移除通知
- (void)dealloc
{
    [[NSNotificationCenter defaultCenter]removeObserver:self];
}
-(void)countAdd:(NSNotification *)note
{   //發(fā)布者
    WineTableViewCell *cell = note.object;
    int price = self.Price.text.intValue + cell.wine.money.intValue;
    self.Price.text = [NSString stringWithFormat:@"%d",price];
    
}
-(void)countRemove:(NSNotification *)note

{
    //發(fā)布者
    WineTableViewCell *cell = note.object;
    int price = self.Price.text.intValue - cell.wine.money.intValue;
    self.Price.text = [NSString stringWithFormat:@"%d",price];
    
}

- (IBAction)add {
    self.wine.count ++;
    self.count.text = [NSString stringWithFormat:@"%ld",(long)self.wine.count];
    self.remove.enabled = YES;
    //發(fā)布通知
    [[NSNotificationCenter defaultCenter]postNotificationName:@"AddCount" object:self];
    
}
- (IBAction)deleate {
    self.wine.count --;
    self.count.text = [NSString stringWithFormat:@"%ld",(long)self.wine.count];
    if (self.wine.count==0) {
        self.remove.enabled = NO;
    }
    //發(fā)布通知
    [[NSNotificationCenter defaultCenter]postNotificationName:@"RemoveCount" object:self];
    
}


block寫法不要移除 執(zhí)行block中的代碼塊
    // 監(jiān)聽通知
    NSNotificationCenter *center = [NSNotificationCenter defaultCenter];

    
    [center addObserverForName:@"plusClickNotification"  object:nil queue:[NSOperationQueue mainQueue] usingBlock:^(NSNotification * _Nonnull note) {
        // 發(fā)布者
        XMGWineCell *cell = note.object;
        
        // 計算總價
        int totalPrice = self.totalPriceLabel.text.intValue + cell.wine.money.intValue;
        
        // 設(shè)置總價
        self.totalPriceLabel.text = [NSString stringWithFormat:@"%d",totalPrice];

        
    }];

kvo

@implementation ViewController
- (NSMutableArray *)WineData
{
    if (!_WineData) {
        _WineData = [Wine mj_objectArrayWithFilename:@"wine.plist"];
        //監(jiān)聽屬性變化
        for (Wine *wine in _WineData) {
            [wine addObserver:self forKeyPath:@"count" options:NSKeyValueObservingOptionNew|NSKeyValueObservingOptionOld context:nil];
        }
    }
    
    return _WineData;
}
- (void)viewDidLoad {
    [super viewDidLoad];
    
}
//移除KVO
- (void)dealloc
{
    for (Wine *wine in _WineData) {
        [wine removeObserver:self forKeyPath:@"count"];
    }
}
#pragma mark - KVO
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(Wine*)wine change:(NSDictionary<NSString *,id> *)change context:(void *)context
{
    int new = [change[NSKeyValueChangeNewKey] intValue];
    int old = [change[NSKeyValueChangeOldKey]intValue];
    if (new>old) {
        int price = self.Price.text.intValue + wine.money.intValue;
        self.Price.text = [NSString stringWithFormat:@"%d",price];
        self.buyBtn.enabled = YES;
    }else
    {
        int price = self.Price.text.intValue - wine.money.intValue;
        self.Price.text = [NSString stringWithFormat:@"%d",price];
        self.buyBtn.enabled = (price>0);
        
    }
}


block寫法
  • 缺點：在類中一使用到就會調(diào)用了
  • 如果一個類使用來kvo監(jiān)聽，蘋果木默認會給這個類生成一個子類,在子類中監(jiān)聽這些事情

代理

#import <UIKit/UIKit.h>
@class Wine,WineTableViewCell;
/** 代理*/
@protocol WineTableViewCellDalegate <NSObject>

@optional
-(void)wineCellClickAddBtn:(WineTableViewCell *)wine;
-(void)wineCellClickDeleateBtn:(WineTableViewCell *)wine;
@end

@interface WineTableViewCell : UITableViewCell

/** 模型*/
@property(strong,nonatomic)Wine *wine;

/** 代理屬性*/
@property(weak,nonatomic)id <WineTableViewCellDalegate> delegate;
@end



@implementation WineTableViewCell
 /** 代理*/
    if ([self.delegate respondsToSelector:@selector(wineCellClickAddBtn:)]) {
        [self.delegate wineCellClickAddBtn:self];
    }

    /** 代理*/
    if ([self.delegate respondsToSelector:@selector(wineCellClickDeleateBtn:)]) {
        [self.delegate wineCellClickDeleateBtn:self];
    }
    
    //設(shè)置代理
    cell.delegate = self;
    //遵守協(xié)議
    @interface ViewController ()<UITableViewDataSource,UITableViewDelegate,WineTableViewCellDalegate>
    //實現(xiàn)方法
    #pragma mark - WineTableViewCellDalegate
-(void)wineCellClickAddBtn:(WineTableViewCell *)wine
{
    int price = self.Price.text.intValue + wine.wine.money.intValue;
    self.Price.text = [NSString stringWithFormat:@"%d",price];
    self.buyBtn.enabled = YES;
    //添加到購物車
    if (![self.shopping containsObject:wine.wine])
    {
        [self.shopping addObject:wine.wine];
    }
}
-(void)wineCellClickDeleateBtn:(WineTableViewCell *)wine
{
    int price = self.Price.text.intValue - wine.wine.money.intValue;
    self.Price.text = [NSString stringWithFormat:@"%d",price];
    self.buyBtn.enabled = (price>0);
    //移除購物車
    if (wine.wine.count==0) {
        [self.shopping removeObject:wine.wine];
    }
    
}
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