我正在编写一个谷歌阅读器应用程序，并一直在尝试使用UISwitch创建设置表视图。下面是完整的代码序列：
@implementation Settings
@synthesize rowImage;
@synthesize ViewPushed;
@synthesize alreadySignedIn;
@synthesize syncStartupSwitch;
@synthesize confirmMarkSwitch;
@synthesize landscapeModeSwitch;
@synthesize appBadgeSwitch;
@synthesize fontSwitch;
@synthesize newItemsSwitch;
#pragma mark -
#pragma mark View lifecycle
static SEL syncStartup;
static SEL markAsReadConfirm;
static SEL landscapeMode;
static SEL appBadge;
static SEL fontSettings;
static SEL newItemsFirstSel;
+(void) initialize{
syncStartup = @selector(syncAtStartup:);
markAsReadConfirm = @selector (confirmMarkAsRead:);
landscapeMode = @selector (landscapeMode:);
appBadge = @selector (appBadgeSetting:);
fontSettings = @selector (largeFontSetting:);
newItemsFirstSel = @selector (newItemFirst:);
}
-(void) newItemFirst:(id)sender {
if ([sender isOn]) {
newItemsSwitch = YES;
}else {
newItemsSwitch = NO;
}
}
-(void) syncAtStartup:(id)sender {
if ([sender isOn]) {
syncStartupSwitch = YES;
}else {
syncStartupSwitch = NO;
}
}
-(void) confirmMarkAsRead:(id)sender{
if ([sender isOn]) {
confirmMarkSwitch = YES;
}else {
confirmMarkSwitch = NO;
[self.tableView reloadData];
}
}
-(void) landscapeMode:(id)sender{
if([sender isOn]) {
landscapeModeSwitch = YES;
}else {
landscapeModeSwitch = NO;
}
}
-(void) appBadgeSetting:(id)sender{
if([sender isOn]) {
appBadgeSwitch = YES;
}else {
appBadgeSwitch = NO;
}
}
-(void) largeFontSetting:(id)sender{
if ([sender isOn]) {
[UIFont systemFontOfSize:32];
fontSwitch = YES;
NSLog(@"YES");
}else {
fontSwitch = NO;
NSLog(@"YES");
}
}
/*
-(void) saveLastViewedItem{
[plistData setValue:[[[UIApplication sharedApplication]delegate]currentItemID]forKey:keyLastItemID];
[plistData setValue:[[[[[[[UIApplication sharedApplication]delegate]navController]navController]topViewController]delegate]tag]forKey:keyLastItemTag];
}
-(void) save {
[self saveLastViewedItem];
BOOL success = [plistData writeToFile:[docsPath stringByAppendingPathComponent:plistName] atomically:YES];
if (!success) {
NSLog(@"FAILED saving plist");
}else {
dbg_s(@"saved data:%@ to file: %@", plistData, [docsPath stringByAppendingPathComponent:plistName]);
}
}
-(void) load{
dbg(@"loading plist data from path: %@", [docsPath stringByAppendingPathComponent:plistName]);
plistData = [[NSMutableDictionary dictionaryWithContentsOfFile:[docsPath stringByAppendingPathComponent:plistName]]retain];
if(!plistData){
NSLog(@"FAILED loading plist");
plistData = [[NSMutableDictionary dictionary] retain];
}
dbg_s(@"Loaded plist data", plistData);
dbg_s("%@", plistData);
[self removeDeprecatedProperties];
[self loadFeedList];
}
-(void) removeDeprecatedProperties{
for (NSString * deprecatedProperty in deprecatedProperties){
[plistData removeObjectForKey:deprecatedProperty];
}
}
-(void) reloadFeedList{
[self loadFeedList];
[self setUIElements];
}
-(NSArray *) loadFeedList {
NSString *contents = [NSString stringWithContentsOfFile:[docsPath stringByAppendingPathComponent:@"tagList"]encoding:NSUTF8StringEncoding error:nil];
id result;
if(!contents) {
dbg(@"no feed list loaded");
result = nil;
}else {
NSArray *originalList = [contents componentsSeparatedByString:@"\n"];
NSMutableArray *feedList = [NSMutableArray arrayWithCapacity:[originalList count]];
for (NSString *feed in originalList) {
NSString *trimmedFeed = [feed stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
if([feed length] > 0){
[feedList addObject:trimmedFeed];
}
}
result = feedList;
}
[possibleTags release];
possibleTags = [result retain];
return result;
}
-(NSArray *)feedList {
return possibleTags;
}
-(NSArray *) activeTagList {
id tags = [self tagList];
NSArray *result = [NSMutableArray arrayWithCapacity:[tags count]];
for (NSString *tag in tags) {
if([possibleTags containsObject:tag]) {
[result arrayByAddingObject:tag];
}
}
return result;
}
-(id) init{
self =[super init];
plistName = @"config.plist";
if (openLinksInSegmentValues == nil)
openLinksInSegmentValues = [[NSArray alloc] initWithObjects:openLinksInAskMeValue, openLinksInSafariValue, openLinksIniReaderValue, nil];
if (deprecatedProperties == nil)
deprecatedProperties = [[NSArray alloc] initWithObjects:@"openInSafari", nil];
[self docsPath];
[self load];
return self;
}
*/
- (void)viewDidLoad {
syncSwitch=[[[UISwitch alloc] initWithFrame:CGRectZero]autorelease];
readSwitch=[[[UISwitch alloc] initWithFrame:CGRectZero]autorelease];
landscapeSwitch=[[[UISwitch alloc] initWithFrame:CGRectZero]autorelease];
badgeSwitch=[[[UISwitch alloc] initWithFrame:CGRectZero]autorelease];
largeFontSwitch=[[[UISwitch alloc] initWithFrame:CGRectZero]autorelease];
newItemsFirstSwitch =[[[UISwitch alloc] initWithFrame:CGRectZero]autorelease];
//switcher = [[[UISwitch alloc] initWithFrame:CGRectZero]autorelease];
NSString *loginData;
NSError *keychainError;
NSString *checkUsername= [SFHFKeychainUtils getPasswordForUsername:@"Username" andServiceName:@"iReader" error:&keychainError];
NSString *checkPassword = [SFHFKeychainUtils getPasswordForUsername:@"Password" andServiceName:@"iReader" error:&keychainError];
if (checkPassword == nil || checkUsername == nil) {
alreadySignedIn = NO;
loginData = @"Sync Settings";
} else {
alreadySignedIn = YES;
loginData = @"Logout";
}
if(ViewPushed == NO) {
self.navigationItem.leftBarButtonItem = [[[UIBarButtonItem alloc]
initWithBarButtonSystemItem:UIBarButtonSystemItemCancel
target:self action:@selector(cancel_Clicked:)] autorelease];
}
listOfItems = [[NSMutableArray alloc] init];
NSArray *syncSettingsToLoad = [NSArray arrayWithObjects:loginData, nil];
NSDictionary *syncSettingsToLoadDict = [NSDictionary dictionaryWithObject:syncSettingsToLoad forKey:@"Settings"];
NSArray *generalSetting = nil;
generalSetting = [NSArray arrayWithObjects:@"Sync at Startup",@"Confirm Mark as Read", @"Landscape Mode", @"Cache Settings",nil];
NSMutableDictionary *generalSettingsDict = [NSMutableDictionary dictionaryWithObject:generalSetting forKey:@"Settings"];
NSArray *appearanceSettings = [NSArray arrayWithObjects:@"New Items First", @"App Icon Badge", @"Large Font", nil];
NSDictionary *appearanceSettingsDict = [NSDictionary dictionaryWithObject:appearanceSettings forKey:@"Settings"];
NSArray *sharingSettings = [NSArray arrayWithObjects:@"Customize Sharing Options", nil];
NSDictionary *sharingSettingsDict = [NSDictionary dictionaryWithObject:sharingSettings forKey:@"Settings"];
NSArray *advancedSettings = [NSArray arrayWithObjects:@"Advanced Options", nil];
NSDictionary *advancedSettingsDict = [NSDictionary dictionaryWithObject:advancedSettings forKey:@"Settings"];
[listOfItems addObject:syncSettingsToLoadDict];
[listOfItems addObject:generalSettingsDict];
[listOfItems addObject:appearanceSettingsDict];
[listOfItems addObject:sharingSettingsDict];
[listOfItems addObject:advancedSettingsDict];
self.title =@"Settings";
// Uncomment the following line to preserve selection between presentations.
//self.clearsSelectionOnViewWillAppear = NO;
// Uncomment the following line to display an Edit button in the navigation bar for this view controller.
// self.navigationItem.rightBarButtonItem = self.editButtonItem;
[super viewDidLoad];
}
//defaultDatabase = [[userPrefs valueForKey:MAPref_DefaultDatabase] retain];
-(void) cancel_Clicked:(id)sender
{
[self.navigationController dismissModalViewControllerAnimated:YES];
}
- (void)viewWillAppear:(BOOL)animated {
//[self.navigationController setNavigationBarHidden:YES animated:animated];
[super viewWillAppear:animated];
}
/*
- (void)viewDidAppear:(BOOL)animated {
[super viewDidAppear:animated];
}
*/
/*
- (void)viewWillDisappear:(BOOL)animated {
[super viewWillDisappear:animated];
}
*/
/*
- (void)viewDidDisappear:(BOOL)animated {
[super viewDidDisappear:animated];
}
*/
/*
// Override to allow orientations other than the default portrait orientation.
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
// Return YES for supported orientations
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
*/
#pragma mark -
#pragma mark Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
// Return the number of sections.
return [listOfItems count];
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
// Return the number of rows in the section.
NSDictionary *dictionary = [listOfItems objectAtIndex:section];
NSArray *array = [dictionary objectForKey:@"Settings"];
return [array count];
}
-(NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:
(NSInteger) section {
if (section == 0) {
return @"Sync Settings";
}
if (section == 1) {
return @"General Options";
}
if (section == 2) {
return @"Appearance Options";
}
if (section == 3){
return @"Sharing Options";
}
if (section == 4){
return @"Advanced Options";
}
return nil;
}
// Customize the appearance of table view cells.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
//NSLog(@"This is what we are looking for %@ %@", checkUsername, checkPassword);
// Configure the cell...
NSDictionary *dictionary = [listOfItems objectAtIndex:indexPath.section];
NSArray *array =[dictionary objectForKey:@"Settings"];
NSString * cellValue = [array objectAtIndex:indexPath.row];
static NSString *CellIdentifier = @"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (indexPath.section == 0 && indexPath.row == 0) {
static NSString *SomeIdentifierA = @"SomeIdentifierA";
// This could be some custom table cell class if appropriate
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:SomeIdentifierA];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:SomeIdentifierA] autorelease];
cell.accessoryType = UITableViewCellSelectionStyleBlue;
}
cell.textLabel.text =cellValue;
return cell;
}
else if (indexPath.section ==1 && indexPath.row ==0) {
static NSString *SomeIdentifierB = @"SomeIdentifierB";
// This could be some custom table cell class if appropriate
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:SomeIdentifierB];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:SomeIdentifierB] autorelease];
[syncSwitch addTarget:self action:@selector(syncAtStartup:) forControlEvents:UIControlEventValueChanged];
//[cell.contentView addSubview:syncSwitch];
cell.accessoryView = syncSwitch;
cell.selectionStyle = UITableViewCellSelectionStyleNone;
//cell.reuseIdentifier = @"Cell1";
}
cell.textLabel.text =@"Sync at Startup";
return cell;
}
else if(indexPath.section == 1 && indexPath.row == 1){
static NSString *SomeIdentifierC = @"SomeIdentifierC";
// This could be some custom table cell class if appropriate
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:SomeIdentifierC];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:SomeIdentifierC] autorelease];
[readSwitch addTarget:self action:@selector(confirmMarkAsRead:) forControlEvents:UIControlEventValueChanged];
cell.accessoryView = readSwitch;
cell.selectionStyle = UITableViewCellSelectionStyleNone;
}
cell.textLabel.text =@"Confirm Mark as Read";
return cell;
}
else if(indexPath.section == 1 && indexPath.row == 2){
static NSString *SomeIdentifierD = @"SomeIdentifierD";
// This could be some custom table cell class if appropriate
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:SomeIdentifierD];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:SomeIdentifierD] autorelease];
[landscapeSwitch addTarget:self action:@selector(landscapeMode:) forControlEvents:UIControlEventValueChanged];
cell.accessoryView = landscapeSwitch;
cell.selectionStyle = UITableViewCellSelectionStyleNone;
}
cell.textLabel.text =@"Landscape Mode";
return cell;
}
else if (indexPath.section == 1 && indexPath.row == 3) {
static NSString *SomeIdentifierE = @"SomeIdentifierE";
// This could be some custom table cell class if appropriate
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:SomeIdentifierE];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:SomeIdentifierE] autorelease];
cell.accessoryType = UITableViewCellSelectionStyleBlue;
}
cell.textLabel.text =@"Cache Settings";
return cell;
}
else if (indexPath.section == 1 && indexPath.row == 4) {
static NSString *SomeIdentifierJ = @"SomeIdentifierJ";
// This could be some custom table cell class if appropriate
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:SomeIdentifierJ];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:SomeIdentifierJ] autorelease];
cell.accessoryType = UITableViewCellSelectionStyleBlue;
}
cell.textLabel.text =@"Caches";
return cell;
}
else if(indexPath.section == 2 && indexPath.row == 0){
static NSString *SomeIdentifierN = @"SomeIdentifierF";
// This could be some custom table cell class if appropriate
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:SomeIdentifierN];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:SomeIdentifierN] autorelease];
[newItemsFirstSwitch addTarget:self action:@selector(newItemFirst:) forControlEvents:UIControlEventValueChanged];
cell.accessoryView = newItemsFirstSwitch;
cell.selectionStyle = UITableViewCellSelectionStyleNone;
}
cell.textLabel.text =@"App Icon Badge";
return cell;
}
else if(indexPath.section == 2 && indexPath.row == 1){
static NSString *SomeIdentifierF = @"SomeIdentifierF";
// This could be some custom table cell class if appropriate
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:SomeIdentifierF];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:SomeIdentifierF] autorelease];
[badgeSwitch addTarget:self action:@selector(appBadgeSetting:) forControlEvents:UIControlEventValueChanged];
cell.accessoryView = badgeSwitch;
cell.selectionStyle = UITableViewCellSelectionStyleNone;
}
cell.textLabel.text =@"App Icon Badge";
return cell;
}
else if(indexPath.section == 2 && indexPath.row == 2){
static NSString *SomeIdentifierG = @"SomeIdentifierG";
// This could be some custom table cell class if appropriate
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:SomeIdentifierG];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:SomeIdentifierG] autorelease];
[largeFontSwitch addTarget:self action:@selector (largeFontSetting:) forControlEvents:UIControlEventValueChanged];
//[largeFontSwitch addTarget:self action:@selector(largeFontSetting:) forControlEvents:UIControlEventValueChanged];
cell.accessoryView = largeFontSwitch;
cell.selectionStyle = UITableViewCellSelectionStyleNone;
}
cell.textLabel.text =@"Large Font Size";
return cell;
}
else if (indexPath.section == 3 && indexPath.row == 0) {
static NSString *SomeIdentifierH = @"SomeIdentifierH";
// This could be some custom table cell class if appropriate
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:SomeIdentifierH];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:SomeIdentifierH] autorelease];
cell.accessoryType = UITableViewCellSelectionStyleBlue;
}
cell.textLabel.text =@"Customize Sharing Options";
return cell;
}
else if (indexPath.section == 4 && indexPath.row == 0) {
static NSString *SomeIdentifierI = @"SomeIdentifierI";
// This could be some custom table cell class if appropriate
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:SomeIdentifierI];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:SomeIdentifierI] autorelease];
cell.accessoryType = UITableViewCellSelectionStyleBlue;
}
cell.textLabel.text =@"Advanced Options";
return cell;
}
//switcher.on = [[NSUserDefaults standardUserDefaults]boolForKey:@"Settings"];
cell.textLabel.font = [UIFont boldSystemFontOfSize:13];
cell.textLabel.adjustsFontSizeToFitWidth = YES;
return cell;
}
/*
// Override to support conditional editing of the table view.
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath {
// Return NO if you do not want the specified item to be editable.
return YES;
}
*/
/*
// Override to support editing the table view.
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
if (editingStyle == UITableViewCellEditingStyleDelete) {
// Delete the row from the data source
[tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
}
else if (editingStyle == UITableViewCellEditingStyleInsert) {
// Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view
}
}
*/
/*
// Override to support rearranging the table view.
- (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)fromIndexPath toIndexPath:(NSIndexPath *)toIndexPath {
}
*/
/*
// Override to support conditional rearranging of the table view.
- (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath {
// Return NO if you do not want the item to be re-orderable.
return YES;
}
*/
#pragma mark -
#pragma mark Table view delegate
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
if(indexPath.section ==0){
if (alreadySignedIn == NO) {
if(indexPath.section == 0 && ivControllerCell == nil ){
[tableView reloadData];
ivControllerCell = [[GoogleClientLogin alloc] initWithNibName:@"GoogleClientLogin" bundle:[NSBundle mainBundle]];
ivControllerCell.ViewPushed = YES;
//Push the view controller to the top of the stack.
[self.navigationController pushViewController:ivControllerCell animated:YES];
[ivControllerCell release];
ivControllerCell = nil;
}
}
if (alreadySignedIn ==YES) {
NSError *keyChainEmpty;
[SFHFKeychainUtils deleteItemForUsername:@"Username" andServiceName:@"iReader" error:&keyChainEmpty];
[SFHFKeychainUtils deleteItemForUsername:@"Password" andServiceName:@"iReader" error:&keyChainEmpty];
ivControllerCell = [[GoogleClientLogin alloc] initWithNibName:@"GoogleClientLogin" bundle:[NSBundle mainBundle]];
ivControllerCell.ViewPushed = YES;
[self.navigationController pushViewController:ivControllerCell animated:YES];
}
}
}
-(void) removeSelfFromWindow
{/*
if(self.view.superview){
[UIView beginAnimations:@"curldown" context:nil];
[UIView setAnimationDelegate:self];
[UIView setAnimationDuration:0.5];
[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
[UIView setAnimationTransition:UIViewAnimationTransitionCurlDown forView:self.view cache:NO];
[self.view.superview removeFromSuperview];
}
[UIView commitAnimations];
*/}
#pragma mark -
#pragma mark Memory management
- (void)didReceiveMemoryWarning {
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
// Relinquish ownership any cached data, images, etc that aren't in use.
}
- (void)viewDidUnload {
// Relinquish ownership of anything that can be recreated in viewDidLoad or on demand.
// For example: self.myOutlet = nil;
}
/*static Settings * _standardSettings = nil;
+(Settings *)standardSettings
{
if (_standardSettings == nil)
_standardSettings = [[Settings alloc] init];
return _standardSettings;
}*/
-(void) setUIElements {
[landscapeSwitch setOn:[self landscapeModeSwitch]];
//[feedList setSelectedFeeds:[self taglist]];
}
- (void)dealloc {
[self save];
[plistData release];
[plistName release];
[super dealloc];
}
@end
当我开始滚动表格视图时，我收到以下错误。
Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFType addTarget:action:forControlEvents:]: unrecognized selector sent to instance 0x5f463e0'
有人可以帮我解决这个错误吗？
干杯
答案 0 :(得分：1)
分配时不要自动释放开关。在这些行之后，您不拥有任何这些对象。
syncSwitch=[[UISwitch alloc] initWithFrame:CGRectZero];
在dealloc方法中释放它们
[syncSwitch release];