iPad上未出现的iPhone表视图的奇怪行为
iPad上未出现的iPhone表视图的奇怪行为
提问于 2011-08-23 07:17:22
我已经构建了一个包含2个部分的分组表视图。
在每个部分中总是必须有一个选择，并且不能有更多选择。
在iPad上测试时，这是非常稳定的。
我最近开始为iPhone版本开发xib。
现在事情开始变得奇怪了。滚动选择时，所选内容到处飞，消失，有时在一个部分中有4个选择。
完全相同的代码可以在iPad上完美地运行。
有没有任何已知的bug可能会导致这种情况发生？
使用代码更新：
- (void)viewDidLoad
{
[super viewDidLoad];
self.view.backgroundColor = [UIColor whiteColor];
//Initialize the array.
listOfItems = [[NSMutableArray alloc] init];
NSArray *countriesToLiveInArray = [NSArray arrayWithObjects:@"Baskerville", @"Palatino", @"Times New Roman", @"Verdana", nil];
NSDictionary *countriesToLiveInDict = [NSDictionary dictionaryWithObject:countriesToLiveInArray forKey:@"Countries"];
NSArray *countriesLivedInArray = [NSArray arrayWithObjects:@"My Text", @"My Text", @"My Text", @"My Text", @"My Text", @"My Text", @"My Text", @"My Text", @"My Text", @"My Text", @"My Text", @"My Text", nil];
NSDictionary *countriesLivedInDict = [NSDictionary dictionaryWithObject:countriesLivedInArray forKey:@"Countries"];
[listOfItems addObject:countriesToLiveInDict];
[listOfItems addObject:countriesLivedInDict];
//Set the title
self.navigationItem.title = @"Countries";
}
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
//SET Font
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];
}
else
{
NSInteger row = [[prefs objectForKey:@"lastIndexPath1"] intValue];
lastIndexPath1 = [NSIndexPath indexPathForRow:row inSection:0];
UITableViewCell *newCell = [myTableView cellForRowAtIndexPath:lastIndexPath1];
newCell.accessoryType = UITableViewCellAccessoryCheckmark;
}
//SET Font SIZE
NSString *neverOpendFonts2 = [prefs objectForKey:@"neverOpendFonts2"];
if (![neverOpendFonts2 isEqualToString:@"1"]) {
lastIndexPath2 =[NSIndexPath indexPathForRow:2 inSection:1];
UITableViewCell *newCell = [myTableView cellForRowAtIndexPath:lastIndexPath2];
newCell.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
{
NSInteger row2 = [[prefs objectForKey:@"lastIndexPath2"] intValue];
lastIndexPath2 = [NSIndexPath indexPathForRow:row2 inSection:1];
UITableViewCell *newCell2 = [myTableView cellForRowAtIndexPath:lastIndexPath2];
newCell2.accessoryType = UITableViewCellAccessoryCheckmark;
}
}
- (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:@"Countries"];
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];
}
// Set up the cell...
//First get the dictionary object
NSDictionary *dictionary = [listOfItems objectAtIndex:indexPath.section];
NSArray *array = [dictionary objectForKey:@"Countries"];
NSString *cellValue = [array objectAtIndex:indexPath.row];
cell.textLabel.text = cellValue;
if (indexPath.section == 0)
{
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) {
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;
}
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
// CGFloat result;
if (indexPath.section == 0)
{
return 50;
}
if (indexPath.section == 1) {
switch (indexPath.row) {
case 0:
{
return 50;
}
break;
case 1:
{
return 50;
}
break;
case 2:
{
return 50;
}
break;
case 3:
{
return 50;
}
break;
case 4:
{
return 50;
}
break;
case 5:
{
return 50;
}
break;
case 6:
{
return 50;
}
break;
case 7:
{
return 54;
}
break;
case 8:
{
return 58;
}
break;
case 9:
{
return 62;
}
break;
case 10:
{
return 66;
}
break;
case 11:
{
return 70;
}
break;
}
}
return 50;
}
- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section {
if (section == 0) {
return @"Font";
}
if (section == 1) {
return @"Font Size";
}
else if (!section == 0 || !section == 1) {
return @"Text";
}
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
UITableViewCell *newCell = [tableView cellForRowAtIndexPath:indexPath];
NSInteger newRow = [indexPath row];
if (indexPath.section == 0) {
NSString *fontName;
switch (indexPath.row) {
case 0:
{
fontName = [NSString stringWithFormat:@"Baskerville"];
}
break;
case 1:
{
fontName = [NSString stringWithFormat:@"Palatino"];
}
break;
case 2:
{
fontName = [NSString stringWithFormat:@"Times New Roman"];
}
break;
case 3:
{
fontName = [NSString stringWithFormat:@"Verdana"];
}
break;
}
NSInteger oldRow = (lastIndexPath1 != nil) ? [lastIndexPath1 row] : -1;
if(newRow != oldRow)
{
newCell.accessoryType = UITableViewCellAccessoryCheckmark;
UITableViewCell *oldCell = [tableView cellForRowAtIndexPath:lastIndexPath1];
oldCell.accessoryType = UITableViewCellAccessoryNone;
lastIndexPath1 = indexPath;
}
NSInteger lastRow = lastIndexPath1.row;
NSString *lastIndexPathString = [NSString stringWithFormat:@"%i", lastRow];
[prefs setObject:lastIndexPathString forKey:@"lastIndexPath1"];
[prefs setObject:fontName forKey:@"fontName"];
[prefs synchronize];
[tableView deselectRowAtIndexPath:indexPath animated:YES];
}
if (indexPath.section == 1) {
NSString *fontSize;
switch (indexPath.row) {
case 0:
{
// cell.textLabel.font = [UIFont fontWithName:@"Palatino" size:16];
fontSize = [NSString stringWithFormat:@"16.0"];
// UITableViewCell *newCell =[tableView cellForRowAtIndexPath:indexPath];
// newCell = [tableView cellForRowAtIndexPath:indexPath];
// newCell.accessoryType = UITableViewCellAccessoryCheckmark;
}
break;
case 1:
{
fontSize = [NSString stringWithFormat:@"20.0"];
}
break;
case 2:
{
fontSize = [NSString stringWithFormat:@"24.0"];
}
break;
case 3:
{
fontSize = [NSString stringWithFormat:@"28.0"];
}
break;
case 4:
{
fontSize = [NSString stringWithFormat:@"32.0"];
}
break;
case 5:
{
fontSize = [NSString stringWithFormat:@"36.0"];
}
break;
case 6:
{
fontSize = [NSString stringWithFormat:@"40.0"];
}
break;
case 7:
{
fontSize = [NSString stringWithFormat:@"44.0"];
}
break;
case 8:
{
fontSize = [NSString stringWithFormat:@"48.0"];
}
break;
case 9:
{
fontSize = [NSString stringWithFormat:@"52.0"];
}
break;
case 10:
{
fontSize = [NSString stringWithFormat:@"56.0"];
}
break;
case 11:
{
fontSize = [NSString stringWithFormat:@"60.0"];
}
break;
}
NSInteger oldRow = (lastIndexPath2 != nil) ? [lastIndexPath2 row] : -1;
if(newRow != oldRow)
{
newCell.accessoryType = UITableViewCellAccessoryCheckmark;
UITableViewCell *oldCell = [tableView cellForRowAtIndexPath:lastIndexPath2];
oldCell.accessoryType = UITableViewCellAccessoryNone;
lastIndexPath2 = indexPath;
}
NSInteger lastRow2 = lastIndexPath2.row;
NSString *lastIndexPathString2 = [NSString stringWithFormat:@"%i", lastRow2];
[prefs setObject:lastIndexPathString2 forKey:@"lastIndexPath2"];
//NSString *lastIndexPathString = [NSString stringWithFormat:@"@%", lastIndexPath2];
//[prefs setObject:lastIndexPathString forKey:@"lastIndexPath2"];
[prefs setObject:fontSize forKey:@"fontSize"];
[prefs synchronize];
[tableView deselectRowAtIndexPath:indexPath animated:YES];
}
}回答 1
Stack Overflow用户
回答已采纳
发布于 2011-09-01 22:08:37
TSolved问题...我在iphonedevsdk.com上得到了答案...
我添加了
if([self.lastIndexPath1 isEqual:indexPath]) { cell.accessoryType = UITableViewCellAccessoryCheckmark; } else { cell.accessoryType = UITableViewCellAccessoryNone; }
到cellForRowAtIndexPath
并添加了
if(self.lastIndexPath1) { UITableViewCell* uncheckCell = [tableView cellForRowAtIndexPath:self.lastIndexPath1]; uncheckCell.accessoryType = UITableViewCellAccessoryNone; } UITableViewCell* cell = [tableView cellForRowAtIndexPath:indexPath]; cell.accessoryType = UITableViewCellAccessoryCheckmark; self.lastIndexPath1 = indexPath; }
致didSelectRowAtIndexPath..。
我删除了旧的`/*
NSInteger oldRow = (lastIndexPath1 != nil) ? [lastIndexPath1 row] : -1;
if(newRow != oldRow)
{
newCell.accessoryType = UITableViewCellAccessoryCheckmark;
UITableViewCell *oldCell = [tableView cellForRowAtIndexPath:lastIndexPath1];
oldCell.accessoryType = UITableViewCellAccessoryNone;
lastIndexPath1 = indexPath;
}
*/`来自didSelectRow，现在一切都完美地工作了。
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/7157491
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