我有UITableView个自定义标头，其中包含UITextField。我在textfield中输入文字并点按keyboard上的“完成”以解除键盘 - 工作正常。
我启动了UIActionSheet以确认是否要删除表中的行。点击“确认”，UIActionSheet被取消，行被删除 - 工作正常。
但是，如果我在textfield中输入文字（并关闭键盘），然后尝试删除一行 - 该应用会在UIActionSheet上冻结片刻，然后崩溃。
这是我得到的崩溃报告。
Thread 0 Crashed:
0 CoreFoundation 0x00004260 __CFTypeCollectionRetain + 16
1 CoreFoundation 0x00005e38 __CFDictionaryRetainValue + 20
2 CoreFoundation 0x000054a8 __CFBasicHashAddValue + 100
3 CoreFoundation 0x00005158 CFDictionarySetValue + 68
4 UIKit 0x000e3472 -[UITableView(_UITableViewPrivate) _updateWithItems:withOldRowData:oldRowRange:newRowRange:context:] + 1730
5 UIKit 0x000e281e -[UITableView(_UITableViewPrivate) _endCellAnimationsWithContext:] + 4770
6 UIKit 0x0012a4d6 -[UITableView _updateRowsAtIndexPaths:updateAction:withRowAnimation:] + 198
7 UIKit 0x0012a3de -[UITableView deleteRowsAtIndexPaths:withRowAnimation:] + 14
8 Tracker8 0x00012502 -[TrackerTableViewController actionSheet:clickedButtonAtIndex:] (PriceTableViewController.m:313)
9 UIKit 0x00369596 -[UIActionSheet(Private) _buttonClicked:] + 186
为什么这两个元素单独工作但不按顺序工作的任何建议？谢谢你的帮助。
更新：我的代码的更多测试显示崩溃仅发生在运行iOS 4.1的设备上。它不会在运行iOS 5.1或iOS 6.0的设备上崩溃。这让我觉得我正在处理一个旧的，可能已知的错误。
我通过将tableview定位在IB中使用标签和文本字段创建的模拟“标题视图”下方来解决这个问题。如果编辑了文本字段，然后删除了一行，则不会再崩溃。
对于那些有兴趣重新创建/解释崩溃的人来说，这里是实现代码：
@synthesize table;
@synthesize array;
#pragma mark View Lifecycle
- (void)viewDidLoad
{
[super viewDidLoad];
NSMutableArray *staticArray = [[NSMutableArray alloc] initWithObjects:@"This is the 1st row.",
@"This is the 2nd row.", @"This is the 3rd row.",
@"This is the 4th row.", @"This is the 5th row.",
@"This is the 6th row.", @"This is the 7th row.",
@"This is the 8th row.", @"This is the 9th row.",
@"This is the 10th row.", nil];
self.array = staticArray;
[staticArray release];
}
#pragma mark TableView Data Source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [self.array count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil)
{
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
[cell autorelease];
}
cell.textLabel.text = [self.array objectAtIndex:indexPath.row];
return cell;
}
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle
forRowAtIndexPath:(NSIndexPath *)indexPath
{
if (editingStyle == UITableViewCellEditingStyleDelete)
{
// remove selected object from the data array
[self.array removeObjectAtIndex:indexPath.row];
// Delete the row from the table.
[self.table deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath]
withRowAnimation:UITableViewRowAnimationFade];
}
}
#pragma mark TableView Delegate
- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section
{
// custom header view containing a label and a textfield
UIView *headerView = [[[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 50)]autorelease];
headerView.backgroundColor = [UIColor darkGrayColor];
headerView.autoresizingMask = UIViewAutoresizingFlexibleWidth;
UILabel *pLabel = [[[UILabel alloc] initWithFrame:CGRectMake(0, 0, 320, 21)] autorelease];
pLabel.autoresizingMask = UIViewAutoresizingFlexibleWidth;
pLabel.backgroundColor = [UIColor clearColor];
pLabel.textAlignment = UITextAlignmentCenter;
pLabel.textColor = [UIColor blackColor];
pLabel.font = [UIFont boldSystemFontOfSize:17.0];
pLabel.adjustsFontSizeToFitWidth = YES;
pLabel.minimumFontSize = 10.0;
pLabel.text = @"Table Header";
UITextField *pField = [[[UITextField alloc] initWithFrame:CGRectMake(20, 18, 280, 31)] autorelease];
pField.autoresizingMask = UIViewAutoresizingFlexibleWidth;
pField.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter;
pField.textAlignment = UITextAlignmentCenter;
pField.textColor = [UIColor blackColor];
pField.font = [UIFont systemFontOfSize:17];
pField.adjustsFontSizeToFitWidth = YES;
pField.minimumFontSize = 10.0;
pField.borderStyle = UITextBorderStyleNone;
pField.clearButtonMode = UITextFieldViewModeWhileEditing;
pField.autocapitalizationType = UITextAutocapitalizationTypeNone;
pField.autocorrectionType = UITextAutocorrectionTypeNo;
pField.keyboardType = UIKeyboardTypeDefault;
pField.returnKeyType = UIReturnKeyDone;
pField.delegate = self;
pField.placeholder = @"tap to enter text";
// add label and textField to the header view
[headerView addSubview:pLabel];
[headerView addSubview:pField];
return headerView;
}
- (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section
{
return 50.0;
}
#pragma mark TextField Delegate
- (BOOL)textFieldShouldReturn:(UITextField *)textField
{
// dismiss the keyboard
[textField resignFirstResponder];
return YES;
}
#pragma mark Memory Management
- (void)didReceiveMemoryWarning
{
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
}
- (void)viewDidUnload
{
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
self.table = nil;
}
- (void)dealloc
{
[table release];
[array release];
[super dealloc];
}
@end
要使其崩溃，请在使用iOS 4.1的设备上运行它，然后按照以下步骤操作：
感谢您查看此问题。