我的应用程序工作正常，直到iOS5。
我有一个包含2个部分的分组tableview。每个部分都有1个选项，使用UITableViewCellAccessoryCheckmark显示。
当我尝试确定if([lastIndexPath1 isEqual:indexPath])
更新：以下全部相关代码：
lastIndexPath1和lastIndexPath2都是我在标头中声明的NSIndexPath对象。数字1跟踪第0部分中的最后一个indexPath，数字2跟踪第1部分。
- (void)viewDidLoad
{
[super viewDidLoad];
self.view.backgroundColor = [UIColor whiteColor];
//Initialize the array.
listOfItems = [[NSMutableArray alloc] init];
NSArray *fontName = [NSArray arrayWithObjects:@"Baskerville", @"Palatino", @"Times New Roman", @"Verdana", nil];
NSDictionary *fontNameInDict = [NSDictionary dictionaryWithObject:fontName forKey:@"FontOptions"];
NSArray *fontSize = [NSArray arrayWithObjects:@"Der var engang", @"Der var engang", @"Der var engang", @"Der var engang", @"Der var engang", @"Der var engang", @"Der var engang", @"Der var engang", @"Der var engang", @"Der var engang", @"Der var engang", @"Der var engang", nil];
NSDictionary *fontSizeInDict = [NSDictionary dictionaryWithObject:fontSize forKey:@"FontOptions"];
[listOfItems addObject:fontNameInDict];
[listOfItems addObject:fontSizeInDict];
}
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
//SET SKRIFTTYPE
NSString *neverOpendFonts1 = [prefs objectForKey:@"neverOpendFonts1"];
if (![neverOpendFonts1 isEqualToString:@"1"]) {
lastIndexPath1 = [NSIndexPath indexPathForRow:1 inSection:0];
UITableViewCell *newCell = [myTableView cellForRowAtIndexPath:lastIndexPath1];
newCell.accessoryType = UITableViewCellAccessoryCheckmark;
NSString *lastIndexPathString1 = [NSString stringWithFormat:@"1"];
[prefs setObject:lastIndexPathString1 forKey:@"lastIndexPath1"];
NSString *fontName = [NSString stringWithFormat:@"Palatino"];
[prefs setObject:fontName forKey:@"fontName"];
neverOpendFonts1 = [NSString stringWithFormat:@"1"];
[prefs setObject:neverOpendFonts1 forKey:@"neverOpendFonts1"];
[prefs synchronize];
NSLog(@"Har aldrig været åbnet - font options");
}
else
{
NSInteger row = [[prefs objectForKey:@"lastIndexPath1"] intValue];
NSLog(@"FONT ROW: %i", row);
lastIndexPath1 = [NSIndexPath indexPathForRow:row inSection:0];
UITableViewCell *newCell = [myTableView cellForRowAtIndexPath:lastIndexPath1];
newCell.accessoryType = UITableViewCellAccessoryCheckmark;
}
//SET SKRIFT STØRRELSE
NSString *neverOpendFonts2 = [prefs objectForKey:@"neverOpendFonts2"];
if (![neverOpendFonts2 isEqualToString:@"1"]) {
if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)
{
lastIndexPath2 = [NSIndexPath indexPathForRow:2 inSection:1];
UITableViewCell *newCell2 = [myTableView cellForRowAtIndexPath:lastIndexPath2];
newCell2.accessoryType = UITableViewCellAccessoryCheckmark;
NSString *lastIndexPathString2 = [NSString stringWithFormat:@"2"];
[prefs setObject:lastIndexPathString2 forKey:@"lastIndexPath2"];
NSString *fontSize = [NSString stringWithFormat:@"24.0"];
[prefs setObject:fontSize forKey:@"fontSize"];
neverOpendFonts2 = [NSString stringWithFormat:@"1"];
[prefs setObject:neverOpendFonts2 forKey:@"neverOpendFonts2"];
[prefs synchronize];
}
else {
lastIndexPath2 = [NSIndexPath indexPathForRow:0 inSection:1];
UITableViewCell *newCell3 = [myTableView cellForRowAtIndexPath:lastIndexPath2];
newCell3.accessoryType = UITableViewCellAccessoryCheckmark;
NSString *lastIndexPathString2 = [NSString stringWithFormat:@"0"];
[prefs setObject:lastIndexPathString2 forKey:@"lastIndexPath2"];
NSString *fontSize = [NSString stringWithFormat:@"16.0"];
[prefs setObject:fontSize forKey:@"fontSize"];
neverOpendFonts2 = [NSString stringWithFormat:@"1"];
[prefs setObject:neverOpendFonts2 forKey:@"neverOpendFonts2"];
[prefs synchronize];
}
}
else
{
NSInteger row2 = [[prefs objectForKey:@"lastIndexPath2"] intValue];
NSLog(@"FONTSIZE ROW: %i", row2);
lastIndexPath2 = [NSIndexPath indexPathForRow:row2 inSection:1];
UITableViewCell *newCell2 = [myTableView cellForRowAtIndexPath:lastIndexPath2];
newCell2.accessoryType = UITableViewCellAccessoryCheckmark;
}
[myTableView reloadData];
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
//Number of rows it should expect should be based on the section
NSDictionary *dictionary = [listOfItems objectAtIndex:section];
NSArray *array = [dictionary objectForKey:@"FontOptions"];
return [array count];
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return [listOfItems count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = @"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
// cell = [[[UITableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:CellIdentifier] autorelease];
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
}
// Set up the cell...
//First get the dictionary object
NSDictionary *dictionary = [listOfItems objectAtIndex:indexPath.section];
NSArray *array = [dictionary objectForKey:@"FontOptions"];
NSString *cellValue = [array objectAtIndex:indexPath.row];
cell.textLabel.text = cellValue;
if (indexPath.section == 0)
{
if([lastIndexPath1 isEqual:indexPath])
{
cell.accessoryType = UITableViewCellAccessoryCheckmark;
}
else
{
cell.accessoryType = UITableViewCellAccessoryNone;
}
switch (indexPath.row) {
case 0:
{
cell.textLabel.font = [UIFont fontWithName:@"Baskerville" size:24];
}
break;
case 1:
{
cell.textLabel.font = [UIFont fontWithName:@"Palatino" size:24];
}
break;
case 2:
{
cell.textLabel.font = [UIFont fontWithName:@"Times New Roman" size:24];
}
break;
case 3:
{
cell.textLabel.font = [UIFont fontWithName:@"Verdana" size:24];
}
break;
}
}
if (indexPath.section == 1) {
if([lastIndexPath2 isEqual:indexPath])
{
cell.accessoryType = UITableViewCellAccessoryCheckmark;
}
else
{
cell.accessoryType = UITableViewCellAccessoryNone;
}
switch (indexPath.row) {
case 0:
{
cell.textLabel.font = [UIFont fontWithName:@"Palatino" size:16];
}
break;
case 1:
{
cell.textLabel.font = [UIFont fontWithName:@"Palatino" size:20];
}
break;
case 2:
{
cell.textLabel.font = [UIFont fontWithName:@"Palatino" size:24];
}
break;
case 3:
{
cell.textLabel.font = [UIFont fontWithName:@"Palatino" size:28];
}
break;
case 4:
{
cell.textLabel.font = [UIFont fontWithName:@"Palatino" size:32];
}
break;
case 5:
{
cell.textLabel.font = [UIFont fontWithName:@"Palatino" size:36];
}
break;
case 6:
{
cell.textLabel.font = [UIFont fontWithName:@"Palatino" size:40];
}
break;
case 7:
{
cell.textLabel.font = [UIFont fontWithName:@"Palatino" size:44];
}
break;
case 8:
{
cell.textLabel.font = [UIFont fontWithName:@"Palatino" size:48];
}
break;
case 9:
{
cell.textLabel.font = [UIFont fontWithName:@"Palatino" size:52];
}
break;
case 10:
{
cell.textLabel.font = [UIFont fontWithName:@"Palatino" size:56];
}
break;
case 11:
{
cell.textLabel.font = [UIFont fontWithName:@"Palatino" size:60];
}
break;
}
}
return cell;
}
答案 0 :(得分：7)
如何定义lastIndexPath1，具有哪些属性？你能尝试通过类使用self.lastIndexPath1吗？
答案 1 :(得分：2)
您没有保留最后一个索引路径。
lastIndexPath1 = [NSIndexPath indexPathForRow:row inSection:0];
[NSIndexPath indexPathforRow：row inSection：0]返回一个自动释放的对象，如果没有保留，则在下一个事件循环结束时释放它。
尝试
[[NSIndexPath indexPathForRow:row inSection:0] retain];
我假设你没有在Xcode 4和ARC下编译
你真的应该使用属性访问器来处理你的lastIndexPath1变量的内存管理
@property (nonatomic, retain) NSIndexPath lastIndexPath1;
然后@synthesize lastIndexPath1;
每当您指定lastIndexPath时，请使用self.lastIndexPath = [NSIndexPath ....]