iOS删除一个tableview行 [英] iOS delete a tableview row

问题描述

我的应用程序在iOS 6上正常运行。升级后我停止了从 UITableView 中删除​​行。

我的原型单元格中有一个按钮。

这是按钮的功能：

   - （IBAction）deleteCell：（id）sender {
 UIButton * btn =（UIButton *）sender; 
 UITableViewCell * cell =（UITableViewCell *）btn.superview.superview; 
 NSIndexPath * indexPath = [_ tableView indexPathForCell：cell]; 
 if（[names count]> 9）{
 int index = indexPath.row; 
 [names removeObjectAtIndex：index]; 
 [照片removeObjectAtIndex：index]; 
 [_tableView deleteRowsAtIndexPaths：[NSArray arrayWithObject：indexPath] withRowAnimation：UITableViewRowAnimationRight]; 
} 
} 
  

问题是我的索引变量始终为0. / p>

我尝试了另一种解决方案：

  - （void）tableView：（UITableView *）tableView commitEditingStyle：（UITableViewCellEditingStyle）editingStyle forRowAtIndexPath：（NSIndexPath *）indexPath {
 
 if（editingStyle == UITableViewCellEditingStyleDelete）{
 int index = indexPath。行; 
 [names removeObjectAtIndex：index]; 
 [照片removeObjectAtIndex：index]; 
 [_tableView deleteRowsAtIndexPaths：[NSArray arrayWithObject：indexPath] withRowAnimation：UITableViewRowAnimationRight]; 
 
} 
} 
  

此解决方案无效。当我向右滑动时没有任何反应。

解决方案

试试这个示例教程，

ViewController.h

  #import< UIKit / UIKit.h> 
 
 @interface ViewController：UIViewController< UITableViewDelegate，UITableViewDataSource> 
 {
 NSMutableArray * arryData1; 
 NSMutableArray * arryData2; 
 IBOutlet UITableView * tableList; 
} 
 
 @end 
  

ViewController.m

  #importViewController.h
 
 @interface ViewController（）
 
 @end 
 
 @implementation ViewController 
 
  - （void）viewDidLoad 
 {
 [super viewDidLoad]; 
 
 arryData1 = [[NSMutableArray alloc] initWithObjects：@MCA，@MBA，@BTech，@MTech，nil]; 
 arryData2 = [[NSMutableArray alloc] initWithObjects：@Objective C，@C ++，@C＃，@。net，nil]; 
 tableList.editing = YES; 
 
} 
 
  - （NSInteger）numberOfSectionsInTableView：（UITableView *）tableView 
 {
 return 1; 
} 
 
  - （NSInteger）tableView：（UITableView *）tableView numberOfRowsInSection：（NSInteger）section 
 {
 return [arryData1 count]; 
} 
 
  - （UITableViewCell *）tableView：（UITableView *）tableView cellForRowAtIndexPath：（NSIndexPath *）indexPath 
 {
 static NSString * CellIdentifier = @Cell ; 
 
 UITableViewCell * cell = [tableView dequeueReusableCellWithIdentifier：CellIdentifier]; 
 if（cell == nil）
 {
 cell = [[UITableViewCell alloc] initWithStyle：UITableViewCellStyleValue1 reuseIdentifier：CellIdentifier]; 
} 
 cell.textLabel.text = [arryData1 objectAtIndex：indexPath.row]; 
 cell.detailTextLabel.text = [arryData2 objectAtIndex：indexPath.row]; 
返回单元格; 
} 
 
  - （void）tableView：（UITableView *）tableView commitEditingStyle：（UITableViewCellEditingStyle）editingStyle forRowAtIndexPath：（NSIndexPath *）indexPath {
 
 if（editingStyle = = UITableViewCellEditingStyleDelete）{
 int index = indexPath.row; 
 [arryData1 removeObjectAtIndex：index]; 
 [arryData2 removeObjectAtIndex：index]; 
 
 [tableView deleteRowsAtIndexPaths：[NSArray arrayWithObject：indexPath] 
 withRowAnimation：UITableViewRowAnimationFade]; 
 
 
} 
} 
 
  - （UITableViewCellEditingStyle）tableView：（UITableView *）aTableView editingStyleForRowAtIndexPath：（NSIndexPath *）indexPath 
 {
 if（tableList.editing）
 {
返回UITableViewCellEditingStyleDelete; 
} 
 
返回UITableViewCellEditingStyleNone; 
} 
 
  - （BOOL）tableView：（UITableView *）tableView canEditRowAtIndexPath：（NSIndexPath *）indexPath 
 {
 return YES; 
} 
  

I had my app working fine on iOS 6. With the upgrade I stopped being able to delete rows from my UITableView.

I've a button in my prototype cell.

Here is the button's function:

- (IBAction)deleteCell:(id)sender {
    UIButton *btn = (UIButton*) sender;
    UITableViewCell *cell = (UITableViewCell*) btn.superview.superview;
    NSIndexPath *indexPath = [_tableView indexPathForCell:cell];
    if([names count] > 9) {
        int index = indexPath.row;
        [names removeObjectAtIndex:index];
        [photos removeObjectAtIndex:index];
        [_tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationRight];
    } 
} 

The problem is my index variable is always 0.

I tried another solution:

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

        if (editingStyle == UITableViewCellEditingStyleDelete) {
            int index = indexPath.row;
            [names removeObjectAtIndex:index];
            [photos removeObjectAtIndex:index];
            [_tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationRight];

}
}

This solution doesn't work either. Nothing happens when I swipe right.

解决方案

Try this sample tutorial,

ViewController.h

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController<UITableViewDelegate,UITableViewDataSource>
{
  NSMutableArray *arryData1;
  NSMutableArray *arryData2;
  IBOutlet UITableView *tableList;
}

@end

ViewController.m

#import "ViewController.h"

@interface ViewController ()

 @end

@implementation ViewController

-(void)viewDidLoad
{
[super viewDidLoad];

arryData1 = [[NSMutableArray alloc] initWithObjects:@"MCA",@"MBA",@"BTech",@"MTech",nil];
arryData2 = [[NSMutableArray alloc] initWithObjects:@"Objective C",@"C++",@"C#",@".net",nil];
tableList.editing=YES;

}

-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}

-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [arryData1 count];
}

-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier= @"Cell";

UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil)
{
    cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleValue1 reuseIdentifier:CellIdentifier] ;
}
cell.textLabel.text = [arryData1 objectAtIndex:indexPath.row];
cell.detailTextLabel.text = [arryData2 objectAtIndex:indexPath.row];
return cell;
}

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

if (editingStyle == UITableViewCellEditingStyleDelete) {
    int index = indexPath.row;
    [arryData1 removeObjectAtIndex:index];
    [arryData2 removeObjectAtIndex:index];

    [tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath]
                     withRowAnimation:UITableViewRowAnimationFade];


}
}

- (UITableViewCellEditingStyle)tableView:(UITableView *)aTableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath
{
if (tableList.editing)
{
    return UITableViewCellEditingStyleDelete;
}

return UITableViewCellEditingStyleNone;
}

- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath
{
return YES;
}

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