行不UITableView的細胞動畫得到取消

Question

- (BOOL)cellIsSelected:(NSIndexPath *)indexPath 
{ 
    // Return whether the cell at the specified index path is selected or not 
    NSNumber *selectedIndex = [selectedIndexes objectForKey:indexPath]; 
    return selectedIndex == nil ? FALSE : [selectedIndex boolValue]; 
} 

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath 
{ 
    // Deselect cell 
    [tableView deselectRowAtIndexPath:indexPath animated:YES]; 
    // Toggle 'selected' state 
    BOOL isSelected = ![self cellIsSelected:indexPath]; 
    // Store cell 'selected' state keyed on indexPath 
    NSNumber *selectedIndex = [NSNumber numberWithBool:isSelected]; 
    [selectedIndexes setObject:selectedIndex forKey:indexPath]; 
    // This is where magic happens... 
    [beveragesTableView beginUpdates]; 
    [beveragesTableView endUpdates]; 

    [selectedIndexes removeAllObjects]; 
} 

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath 
{ 
    // If our cell is selected, return double height 
    if ([self cellIsSelected:indexPath] && ![[descriptionTypeArray objectAtIndex:indexPath.row] isEqualToString:@" "]) 
    { 
     return kCellHeight * 2.0; 
    } 
    // Cell isn't selected so return single height 
    return kCellHeight; 
} 

selectedIndexes被一個目的ofNSMutableDictonary其在h文件 聲明我已經建立在那裏動畫基於存在於所述細胞或不..描述，同時它動畫的tableview，如果我選擇一行的行大小增加，當我再次點擊它的行大小應該回到正常高度，我只能做到這一點，當我選擇另一行/單元格，我想細胞回去正常的高度，當我點擊選定的行。

Answer 1

此代碼剛剛測試過，它的工作原理。你將不得不根據你的需要修改它，但基本的行爲應該適合你的需求。

請注意，不需要撥打beginUpdates/endUpdates。

ViewController.h

#import <UIKit/UIKit.h> 

@interface ViewController : UIViewController <UITableViewDataSource, UITableViewDelegate> 

@property (nonatomic, strong) IBOutlet UITableView *tableView; 

@property (nonatomic, strong) NSIndexPath *lastSelectedCell;; 

@end 

ViewController.m

#import "ViewController.h" 

@implementation ViewController 

@synthesize tableView = _tableView; 
@synthesize lastSelectedCell = _lastSelectedCell;; 

#pragma mark - UITableViewDataSource 

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView { 

    return 1; 
} 

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

    return 100; 
} 

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

    UITableViewCell *cell = [self.tableView dequeueReusableCellWithIdentifier:@"MyIdentifier"]; 

    if (cell == nil) { 
     cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"MyIdentifier"]; 
    } 

    cell.selectionStyle = UITableViewCellSelectionStyleNone; 
    cell.textLabel.text = [NSString stringWithFormat:@"row %d %@",indexPath.row, ([indexPath compare:_lastSelectedCell] == NSOrderedSame)?@"S":@"-"]; 

    return cell; 
} 

#pragma mark - UITableViewDelegate 

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

    NSLog(@"S: %d", indexPath.row); 

    if (([indexPath compare:_lastSelectedCell] == NSOrderedSame)) { 
     _lastSelectedCell = nil; 
    } else { 
     [self setLastSelectedCell: indexPath]; 
    } 

    [tableView reloadData]; 
} 

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


    return ([indexPath compare:_lastSelectedCell] == NSOrderedSame)?80.0:40.0; 
} 

#pragma mark - View lifecycle 

- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 
    _tableView.dataSource = self; 
    _tableView.delegate = self; 
} 

- (void)viewDidUnload 
{ 
    [super viewDidUnload]; 
    _tableView = nil; 
    _lastSelectedCell = nil; 
} 

@end