我有一个带有表格视图的视图控制器，其中包含8个单元格（部分）。我创建了一个textField，并将该文本字段作为子视图添加到6个单元格中，剩下2个单元格，其中一个单元格包含文本视图，另一个单元格包含文本视图因为我使用相同的文本字段，我已经分配了标记值，然后创建了一个可变数组，将文本字段添加到该数组。这是实现代码：
考虑到Mr.Lanc给出的建议，我更改了实施代码
修改
- (UITableViewCell *)tableView:(UITableView *)atableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
NSString *identifier = @"UITableViewCell";
UITableViewCell *cell = (UITableViewCell *)[atableView dequeueReusableCellWithIdentifier:identifier];
atableView.backgroundColor = [UIColor clearColor];
textField = [[[UITextField alloc]initWithFrame:CGRectMake(15, 12, 300, 24)]autorelease];
textField.textColor = [UIColor whiteColor];
textField.delegate = self;
tagValues = textField.tag;
switch (indexPath.section)
{
case 0:
{
NSString *cellIdentifierA = [NSString stringWithFormat:@"S%1dR%1d",indexPath.section,indexPath.row];
if (cell == nil)
{
cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifierA];
cell.backgroundColor = [[UIColor alloc]initWithPatternImage:[UIImage imageNamed:@"reminderbutton.png"]];
}
textField.placeholder = @"Enter name";
textField.tag = 101;
textField.text = reminderInstance.Name;
textField.autocorrectionType = UITextAutocorrectionTypeNo;
[cell.contentView addSubview:textField];
}
break;
case 1:
{
NSString *cellIdentifierB = [NSString stringWithFormat:@"S%1dR%1d",indexPath.section,indexPath.row];
if (cell == nil)
{
cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifierB];
cell.backgroundColor = [[UIColor alloc]initWithPatternImage:[UIImage imageNamed:@"reminderbutton.png"]];
}
textField.tag = 102;
textField.text = reminderInstance.Event;
[cell.contentView addSubview:textField];
}
break;
case 2:
{
NSString *cellIdentifierC = [NSString stringWithFormat:@"S%1dR%1d",indexPath.section,indexPath.row];
if (cell == nil)
{
cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifierC];
cell.backgroundColor = [[UIColor alloc]initWithPatternImage:[UIImage imageNamed:@"reminderbutton.png"]];
}
textField.placeholder = @"Click here to set date and time";
textField.inputView = self.datePicker;
textField.text = reminderInstance.Date;
textField.tag = 103;
[cell.contentView addSubview:textField];
}
break;
case 3:
{
NSString *cellIdentifierD = [NSString stringWithFormat:@"S%1dR%1d",indexPath.section,indexPath.row];
if (cell == nil)
{
cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifierD];
cell.backgroundColor = [[UIColor alloc]initWithPatternImage:[UIImage imageNamed:@"reminderbutton.png"]];
}
textField.tag = 105;
textField.text = reminderInstance.numDays;
textField.inputView = self.reminderPicker;
[cell.contentView addSubview:textField];
}
break;
case 4:
{
NSString *cellIdentifierE = [NSString stringWithFormat:@"S%1dR%1d",indexPath.section,indexPath.row];
if (cell == nil)
{
cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifierE];
cell.backgroundColor = [[UIColor alloc]initWithPatternImage:[UIImage imageNamed:@"reminderbutton.png"]];
}
checkboxButton = [[[UIButton alloc] initWithFrame:CGRectMake(16,1,120, 44)]autorelease];
[checkboxButton setImage:[UIImage imageNamed:@"ewee.png"] forState:UIControlStateNormal];
[checkboxButton addTarget:self action:@selector(toggleButton:) forControlEvents:UIControlEventTouchUpInside];
NSString *one = reminderInstance.selString;
NSNumber* i = [NSNumber numberWithInt:[one intValue]];
BOOL isOn = [i boolValue];
if(isOn)
{
[checkboxButton setImage:[UIImage imageNamed:@"checkarrow.png"] forState:UIControlStateNormal];
}
else
{
[checkboxButton setImage:[UIImage imageNamed:@"ewee.png"] forState:UIControlStateNormal];
}
[checkboxButton setContentHorizontalAlignment:UIControlContentHorizontalAlignmentLeft];
[checkboxButton setImageEdgeInsets:UIEdgeInsetsMake(0.0, 0.0, 0.0, 0.0)];
[cell addSubview:checkboxButton];
UILabel *label = [[UILabel alloc]initWithFrame:CGRectMake(55, 10, 225, 24)];
label.text = @"Every Year";
label.textColor = [UIColor whiteColor];
label.backgroundColor = [UIColor clearColor];
[cell addSubview:label];
cell.textLabel.textColor = [UIColor whiteColor];
[label release];
}
break;
case 5:
{
NSString *cellIdentifierF = [NSString stringWithFormat:@"S%1dR%1d",indexPath.section,indexPath.row];
if (cell == nil)
{
cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifierF];
cell.backgroundColor = [[UIColor alloc]initWithPatternImage:[UIImage imageNamed:@"reminderbutton.png"]];
}
textField.placeholder = @"Enter the number here";
textField.text = num;
textField.text = reminderInstance.number;
textField.tag = 106;
textField.userInteractionEnabled = YES;
textField.keyboardType = UIKeyboardTypeNumberPad;
[cell.contentView addSubview:textField];
}
break;
case 6:
{
NSString *cellIdentifierG = [NSString stringWithFormat:@"S%1dR%1d",indexPath.section,indexPath.row];
if (cell == nil)
{
cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifierG];
cell.backgroundColor = [[UIColor alloc]initWithPatternImage:[UIImage imageNamed:@"reminderbutton.png"]];
}
cell.backgroundColor = [UIColor clearColor];
textView.clipsToBounds = YES;
textView = [[UITextView alloc]initWithFrame: CGRectMake(-2, -3, 307, 154)];
UIImageView *imgView = [[[UIImageView alloc]initWithFrame: textView.frame]autorelease];
imgView.image = [UIImage imageNamed: @"reminderbuttonxl.png"];
[textView addSubview: imgView];
[textView sendSubviewToBack: imgView];
textView.backgroundColor = [UIColor clearColor];
textView.delegate = self;
textView.tag = 11;
textView.text = reminderInstance.msgBody;
tagValues = textView.tag;
textView.textColor = [UIColor whiteColor];
[cell.contentView addSubview:textView];
[textView release];
}
break;
case 7:
{
NSString *cellIdentifierH = [NSString stringWithFormat:@"S%1dR%1d",indexPath.section,indexPath.row];
if (cell == nil)
{
cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifierH];
cell.backgroundColor = [[UIColor alloc]initWithPatternImage:[UIImage imageNamed:@"reminderbutton.png"]];
}
textField.tag = 107;
textField.inputView = self.groupPicker;
tagValues = textField.tag;
textField.text = reminderInstance.remGroup;
[cell.contentView addSubview:textField];
}
break;
default:
break;
}
[self.fields addObject:textField];
NSLog(@"Fields = %@",fields);
return cell;
}
现在，当我尝试使用以下语句打印数组时：
NSLog（@“Fields =％@”，字段）;我可以在控制台窗口中观察以下内容：
Fields = (
"<UITextField: 0x9d043a0; frame = (15 12; 300 24); clipsToBounds = YES; opaque = NO; tag = 101; layer = <CALayer: 0x9d044e0>>"
)
Fields = (
"<UITextField: 0x9d043a0; frame = (15 12; 300 24); clipsToBounds = YES; opaque = NO; tag = 101; layer = <CALayer: 0x9d044e0>>",
"<UITextField: 0x9d07d50; frame = (15 12; 300 24); clipsToBounds = YES; opaque = NO; tag = 102; layer = <CALayer: 0x9d07ca0>>"
)
Fields = (
"<UITextField: 0x9d043a0; frame = (15 12; 300 24); clipsToBounds = YES; opaque = NO; tag = 101; layer = <CALayer: 0x9d044e0>>",
"<UITextField: 0x9d07d50; frame = (15 12; 300 24); clipsToBounds = YES; opaque = NO; tag = 102; layer = <CALayer: 0x9d07ca0>>",
"<UITextField: 0x7108650; frame = (15 12; 300 24); clipsToBounds = YES; opaque = NO; tag = 103; layer = <CALayer: 0x7108620>>"
)
Fields = (
"<UITextField: 0x9d043a0; frame = (15 12; 300 24); clipsToBounds = YES; opaque = NO; tag = 101; layer = <CALayer: 0x9d044e0>>",
"<UITextField: 0x9d07d50; frame = (15 12; 300 24); clipsToBounds = YES; opaque = NO; tag = 102; layer = <CALayer: 0x9d07ca0>>",
"<UITextField: 0x7108650; frame = (15 12; 300 24); clipsToBounds = YES; opaque = NO; tag = 103; layer = <CALayer: 0x7108620>>",
"<UITextField: 0x5c7bf90; frame = (15 12; 300 24); clipsToBounds = YES; opaque = NO; tag = 105; layer = <CALayer: 0x5c7c920>>"
)
Fields = (
"<UITextField: 0x9d043a0; frame = (15 12; 300 24); clipsToBounds = YES; opaque = NO; tag = 101; layer = <CALayer: 0x9d044e0>>",
"<UITextField: 0x9d07d50; frame = (15 12; 300 24); clipsToBounds = YES; opaque = NO; tag = 102; layer = <CALayer: 0x9d07ca0>>",
"<UITextField: 0x7108650; frame = (15 12; 300 24); clipsToBounds = YES; opaque = NO; tag = 103; layer = <CALayer: 0x7108620>>",
"<UITextField: 0x5c7bf90; frame = (15 12; 300 24); clipsToBounds = YES; opaque = NO; tag = 105; layer = <CALayer: 0x5c7c920>>",
"<UITextField: 0x9d08b20; frame = (15 12; 300 24); clipsToBounds = YES; opaque = NO; layer = <CALayer: 0x9d08af0>>"
)
现在我们可以从上面的o / p中看到，要打印的字段数是5个，即4个文本字段和带按钮的单元格，但是根据我们在-CellForRowAtIndexPath中的编码，6个单元格包含文本字段，因此字段数必须为6，但我们得到错误的结果，即5（4个文本字段+按钮），这是一个错误。
这也引导我在表格视图问题中保存数据，即。对于我的案例中标题为“保存”的右侧导航栏按钮项目，我已实现：
-(IBAction)save:(id)sender
{
//Code for saving entered data using sqlite
UITextField *fieldOne = [self.fields objectAtIndex:0];
UITextField *fieldTwo = [self.fields objectAtIndex:1];
UITextField *fieldThree = [self.fields objectAtIndex:2];
UITextField *fieldFour = [self.fields objectAtIndex:3];
UITextField *fieldFive = [self.fields objectAtIndex:5];
UITextField *fieldSix = [self.fields objectAtIndex:7];
sqlite3_stmt *statement = nil;
const char *dbpath = [databasePath UTF8String];
if (sqlite3_open(dbpath, &remindersDB) == SQLITE_OK && textField.text != nil)
{
if (self.navigationItem.rightBarButtonItem.title == @"Save")
{
NSLog(@"am in the save loop");
NSString *insertSQL = [NSString stringWithFormat:@"INSERT INTO reminders(name,event,date,bfr,val,num,bod,grp) VALUES (\"%@\", \"%@\", \"%@\", \"%@\", \"%@\", \"%@\", \"%@\", \"%@\")", fieldOne.text, fieldTwo.text,fieldThree.text,fieldFour.text,isSelected,fieldFive.text,textView.text,fieldSix.text];
const char *insert_stmt = [insertSQL UTF8String];
sqlite3_prepare_v2(remindersDB, insert_stmt, -1, &statement, NULL);
if (sqlite3_step(statement) == SQLITE_DONE)
{
UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"\nReminder Saved" message:nil delegate:nil cancelButtonTitle:nil otherButtonTitles:nil,nil];
[alert show];
[alert dismissWithClickedButtonIndex:0 animated:YES];
[alert release];
}
else
{
UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"Alert" message:@"Reminder not saved" delegate:self cancelButtonTitle:@"Ok" otherButtonTitles:nil];
[alert show];
[alert release];
}
}
//Check the last inserted row id
rowID = sqlite3_last_insert_rowid(remindersDB);
NSLog(@"last inserted rowId = %d",rowID);
sqlite3_finalize(statement);
sqlite3_close(remindersDB);
[self.tableView reloadData];
}
}
现在问题在于索引位置值，因为“fields”数组所持有的值（字段）数为5，索引值将为0-4，但如果我相应地给出值，即在保存时，我会在将数据插入到sqlite数据库时减少一个字段，在控制台中打印时，我在表视图的第5和第7位置获取空值。在上面的实现片段中，我们可以观察到我已经插入了索引位置与表视图节值（索引）的位置。
当我根据表视图的区段索引值进行保存时，值正在正确打印。但是当我没有触摸表视图的第5和第7位置时，我遇到了崩溃问题。 '*** - [NSMutableArray objectAtIndex：]：索引5超出界限[0 .. 4]'
我不明白为什么只有5个字段值被插入到数组中而不是6.Can任何一个，请指导我正确的方向
对于这篇巨大的帖子感到抱歉，我想提供丰富的信息，因此我让它看起来很详细，以便轻松回答这个问题。
修改
表视图的节数和行数：
#pragma mark -
#pragma mark TableView Datasource
- (NSInteger)numberOfSectionsInTableView:(UITableView *)atableView
{
return 8;
}
- (NSInteger)tableView:(UITableView *)atableView numberOfRowsInSection:(NSInteger)section
{
int arr = 1;
return arr;
}
在索引路径处实现行的高度：
- (CGFloat)tableView:(UITableView *)atableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
float f;
if (indexPath.section==6&&indexPath.row==0)
{
f=140.0f;
return f;
}
else
{
f = 44.0f;
return f;
}
}
滚动之前没有加载所有表视图单元格。但是当我滚动时，控件到达第5,6和7个单元格。我发现这就是为什么第5和第7单元格中的文本字段没有被添加到“字段“数组。
我搜索的解决方案主要是this类型
的帖子提前感谢所有人：）
答案 0 :(得分：1)
您是否尝试滚动tableview？我
如果您在if( cell == nil )中添加了此代码，则可能无法创建所有文本字段，因为表格单元格会重复使用。最好是为所有8个单元格提供不同的单元标识符。那样可以解决你的问题。
答案 1 :(得分：0)
我找到问题here
的解决方案感谢所有观看此问题的人。