I have an error when I run my code: It says undeclared identifier of 'alertView' for this line of code:
-(void)alertView:(UIAlertView* )alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
if(buttonIndex==0)
else if(butonIndex==1)
}
Thank you for your help.
It goes something like the following.
- (void)dismissPop2:(NSString *)projectname {
projectdelete = projectname;
NSString *msg = [NSString stringWithFormat:#"Are you sure you want to delete this project (%#)?",projectname];
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"- Project deletion -"
message:msg
delegate:self
cancelButtonTitle:#"Cancel"
otherButtonTitles:#"Delete", nil];
[alert setTag:100];
[alert show];
}
- (BOOL)alertViewShouldEnableFirstOtherButton:(UIAlertView *)alertView { // Validation
if ([alertView tag] == 100) {
return YES;
}
else {
return YES;
}
}
- (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex {
if ([alertView tag] == 100) {
// Deleting a project
if (buttonIndex == 1) {
// Do something since the user has tapped YES
}
}
If it doesn't help, then you should show more work.
You likely have a syntax error earlier in your code that is breaking the parser. Check to make sure the function above the one you posted is closed with a }, all [] are matched, and statements end with a ;
If you post a bit more, someone could probably point it out, but I'm sure you can find it by reading your code.
Related
This question already has answers here:
Two Alert Views in One View Controller - buttonIndex Response
(4 answers)
Closed 7 years ago.
EDIT:
Problem Solved ==> Simply giving a tag solved the problem.
I have the following problem:
On a view I have two UIalertviews:
NSString *message = [NSString stringWithFormat:#"Users must enter this code to join the meeting: %#", meetingCode];
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"Meeting code"
message:message
delegate:self
cancelButtonTitle:#"OK"
otherButtonTitles:#"Copy to clipboard", nil];
[alert show];
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
if(buttonIndex == [alertView cancelButtonIndex])
{
NSLog(#"Code not copied");
}
else
{
UIPasteboard *pasteboard = [UIPasteboard generalPasteboard];
pasteboard.string = meetingCode;
NSLog(#"Code copied");
}
}
and this one:
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
if (editingStyle == UITableViewCellEditingStyleDelete) {
AgendaModel* agenda = _meeting.agenda[indexPath.row] ;
NSDictionary *dict = [[NSDictionary alloc] initWithObjectsAndKeys:agenda.id,#"id",agenda.name,#"name", nil];
NSString *message = [NSString stringWithFormat:#"Are you sure that you want to delete : %#?", agenda.name];
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"Warning"
message:message
delegate:self
cancelButtonTitle:#"Close"
otherButtonTitles:#"Delete", nil];
[alert show];
NSString *delete_url = [NSString stringWithFormat:#"RestAgendas/delete.json"];
[_meeting.agenda removeObject:agenda];
[self.tableView deleteRowsAtIndexPaths:[NSMutableArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
[JSONAPI getWithPath:delete_url andParams:dict completion:^(id json, JSONModelError *err) {
NSLog(#"%#", json);
}];
}
}
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
if(buttonIndex == [alertView cancelButtonIndex])
{
NSLog(#"Agenda Won't Be Deleted");
}
else
{
NSLog(#"Agenda Will Be Deleted");
}
}
Now is the problem that I got the error: Duplicate declaration of method 'alertView:clickedButtonAtIndex'
How can I fix this? I tried some stuff I found here but I still can't make it work. Can someone help me?
Yep, like you said, giving a tag allows you to have multiple UIAlertView in one single view.
Same goes for UIActionSheet or UIAlertController
for future reference, even though this is probably a duplicate, simply create your alert like usual and add
myAlert.tag = 123; //any number of your choice
and in alertView:clickedButtonAtIndex
you can find it using a switch or some if's
if (alertview.tag = 123){
// this is my alert
}else if(alertview.tag = 333){
// this is my other alert
}
For what it's worth, I suggest using else if and not just if to avoid the whole method to be read everytime, and order your if's by decreasing likeliness of being called.
Note you can also give tags to buttons, views, cells, labels, and just pretty much every outlet you can find.
I'm kinda stuck with a stupid problem, in my app when a user press on a TableViewCell he can change some value in the server, before i am sending the information to server i want to show UIAlertView to the user to make sure he wants to do that.
so in didSelectRowAtIndexPath:
i wrote this
UIAlertView *alert = [[UIAlertView alloc]initWithTitle:#"Caution!" message:#"bla bla " delegate:self cancelButtonTitle:#"Cancel" otherButtonTitles:#"Ok", nil];
[alert show];
then its calls the UIAlertView method clickedButtonAtIndex:
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
if (buttonIndex == 0) {
NSString *url = #"some url";
NSDictionary *paramerter = #{#"parameter":parameter};
[self.jsonHandler startParseWithParameters:paramerter andUrlAdress:url withCompletion:^(int errValue) {
if (errValue == 1) {
NSLog(#"ERROR");
}else if (errValue == 0){
[self AlertViewWithTitle:#"success" andMessage:#"success"];
}
}];
}
}
the problem is that the if (buttonIndex == 0) called for every cell and change them all!
and i get UIAlertView message for every cell in the tableView.
how can i prevent it?
EDIT
Ok the problem caused because i use the same buttonIndex for both UIAlertViews
i solved it using this:
NSString *title = [alertView buttonTitleAtIndex:buttonIndex];
if([title isEqualToString:#"buttonString"]){
//Do what ever you need
}
hope someone find it helpful.
The selector 'go' with IBAction return type is not responding correctly. If the button is clicked with the text field being empty i.e its value being nil , the flow should return the 'if' part and not 'else'. But it works fine when I click the button second time. what can be the problem ?
Below is the code from implementation file i.e. ViewController.m where I have implemented the go selector.
#synthesize textField = _textField;
- (void)alertView:(UIAlertView *)alertView willDismissWithButtonIndex:(NSInteger)buttonIndex
{
//Clear the text field
self.textField.text =nil;
}
NSString *s;
-(IBAction)go:(id)sender
{
[self.textField resignFirstResponder];
if (self.textField.text == nil)
{
s = [NSString stringWithFormat:#" Enter Your Name First " ];
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"Blank Field : "
message:s
delegate:self
cancelButtonTitle:#"OKAY"
otherButtonTitles:nil];
[alert show];
}
else
{
s = [NSString stringWithFormat:#"Hello %# " , self.textField.text];
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"Hello "
message:s
delegate:self
cancelButtonTitle:#"Thanks"
otherButtonTitles:nil];
[alert show];
}
}
Please help.
Thanks in advance.
Instead of using nil as your comparator I would instead use something more concrete like
if ([self.textfield.text length] > 0)
{
}
else
{
}
I cannot figure out why I keep getting an EXC_BAD_ACCESS error on the line below in the action sheet method:
[[UIApplication sharedApplication]openURL:[NSURL URLWithString:numberFinal]];
I added my code, but I just don't see why its being over released.
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
number = [[results objectAtIndex:indexPath.row]objectForKey:#"phone"];
number = [number stringByReplacingOccurrencesOfString:#"-" withString:#""];
numberFinal = [NSString stringWithFormat:#"tel:%#",number];
//tel:1234567890
NSLog(#"NUMBER:%#",numberFinal);
[tableView deselectRowAtIndexPath:indexPath animated:YES];
UIAlertView *alert2 = [[[UIAlertView alloc]initWithTitle:#"Call" message:#"Call This Person?" delegate:self cancelButtonTitle:#"NO" otherButtonTitles:#"YES", nil]autorelease];
alert2.tag = kAlertViewTwo;
[alert2 show];
// [alert2 release];
}
- (void)alertView:(UIAlertView *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex {
// the user clicked one of the OK/Cancel buttons
if(actionSheet.tag == kAlertViewOne) {
if (buttonIndex == 0)
{
}else{
}
}
else if(actionSheet.tag == kAlertViewTwo) {
if (buttonIndex == 0)
{
//ok button clicked - close alert
}
else
{
[[UIApplication sharedApplication]openURL:[NSURL URLWithString:numberFinal]];
}
}
}
Try do an NSLog before the line and print numberFinal to see if it allocated ok.
Make sure your class is a UIAlertView Delegate
Try the same line of code in another function to see if it causes the same issue. It might be because you are accessing sharedApplication from within the UIAlertView click event.
Hope that helps :)
- (void)dismissWithClickedButtonIndex:(NSInteger)buttonIndex animated:(BOOL)animated{
if (0 == [alerts cancelButtonIndex]) {
NSLog(#"YES");
} else if (1 == [alerts cancelButtonIndex]) {
NSLog(#"NO");
}
}
I have a UIAlertView, here is the initialization of alerts:
alerts = [[UIAlertView alloc] initWithTitle:#"Trumpets" message:#"Are you sure you would like to use one trumpet, this will give you 10 random units" delegate:self cancelButtonTitle:#"No" otherButtonTitles:#"Yes", nil];
[alerts show];
The error is Expected ')' before '(' token
I don't understand, the NSLogs were to help remember which option was which.
Thanks in advance
You missed the ending bracket:
- (void)dismissWithClickedButtonIndex:(NSInteger)buttonIndex animated:(BOOL)animated{
if ([alerts cancelButtonIndex] == 0) {
NSLog(#"YES");
} else if ([alerts cancelButtonIndex] == 1) {
NSLog(#"NO");
}
}