I want to open the dialog box when the user clicks on a browse button in the nib. This would search for a picture he wants from his pc and upload it. How do I do this programmatically in iphone.
I'm not sure if I understand exactly what you want. But if you just want to show view on top of another view you should user the - (void)presentModalViewController:(UIViewController *)modalViewController animated:(BOOL)animated method of the UIViewController.
When pressing the button you init a new UIViewController subclass that does what you wan't to do in this 'popup'. Then you present it to your current view controller by calling the presentModal... method. When you're finished you can call - (void)dismissModalViewControllerAnimated:(BOOL)animated on your 'popup' view controller to dismiss it.
I think i understand ur problem,if u want to have something like dilogBox in iPhone, then i have something for U. the are two links for .h and .m file.
FileChooserAlert.h and FilechooserAlert.m.After clicking on these two links u'll get required files.Now to implement define ur class like this.
FileChooserAlert* fileChooserAlert = [[FileChooserAlert alloc] initWithTitle:#"Select" message:nil delegate:self cancelButtonTitle:#"Cancel" otherButtonTitles:#"Ok",nil];
[fileChooserAlert show];
[fileChooserAlert release];
The two source file has something that u need to change before u can actually run it.Like there are three images named "File_icon.png","Folder_icon.png","Folder_up.png", which u need to include into ur project.
Now when user selects any file by selecting the tableView Cell and tapping OK button, U can get the file location by calling.
-(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
if (alertView.tag == ALERT_TYPE_FILE_CHOOSER)
{
switch (buttonIndex)
{
case 0: //Cancel
break;
case 1:
{
myFileLocation = [(FileChooserAlert*)alertView getFileCompletePath]];
}break;
default:
break;
}
}
}
If U have any problem implementing this file email me.
Related
I am writing a Cocoa Mac app in Objective-C and using Storyboard for my UI.
I have a "Confirm" button in my sheetViewController.m which I want to perform some action (save some settings) as well as dismiss the sheetViewController at the same time. They both use the sheetViewController.m as outlets.
Unfortunately, with Storyboard, I can only pick one received action (IBAction) or dismissController.
I want to perform the IBAction FIRST, before dismissing the sheet. How can I accomplish this?
Happy to do this in code as well instead of Storyboard if necessary!
Thanks!
You can use codes to dismiss controller in your IBAction.
I found out how to reference Storyboard ID in code:
On MainViewController:
- (IBAction)didClickButton:(NSButton *)sender {
SheetViewController *sheetViewController = [self.storyboard instantiateControllerWithIdentifier:#"SheetViewController"];
// Must match Storyboard ID
[self presentViewControllerAsSheet:sheetViewController];
}
On SheetViewController:
- (IBAction)didClickButton:(NSButton *)button {
// Do something
[self dismissViewController:self];
}
I'm working on this tutorial, which shows how to create an app with storyboards. My viewController has two UIButtons and I have connected a segue to those UIButtons. These segues push a new viewController.
Now I am looking for a way to cancel this segue if a certain condition becomes true. When I used the old xib files to create my interface I was able to do something like this:
-(IBAction)sendButton:(id)sender {
if(TRUE) {
// STOP !!
}
}
This does not work anymore. How can I cancel the push of the new viewController?
Nope. You can't cancel segues that are directly linked to interface elements like your UIButton.
But there is a workaround.
Remove the segue that is linked to the button
Add a segue from the viewController (the one with the button) to the viewController that should be pushed. This must be a segue that is not connected to a interface element. To do this you can start the segue from the status bar. Or create the segue in the left sidebar.
Select this segue, open the attributes inspector and change the Identifier of the segue (e.g. PushRedViewController)
Select Xcodes assistant view, so you can see the .h file of the viewController with the button.
Connect the button to an action. To do this select the button and control-drag to the .h file. Select action in the menu and name your action (e.g. redButtonPressed:)
Open the implementation of your viewController
change the action from step 5 to something like this:
- (IBAction)redButtonPressed:(id)sender {
[self performSegueWithIdentifier:#"PushRedViewController" sender:sender];
}
You can actually do this by adding following method into your code
- (BOOL)shouldPerformSegueWithIdentifier:(NSString *)identifier sender:(id)sender {
if([identifier isEqualToString:#"btnSegue"])
{
return YES;
}
else{
return NO;
}
}
Lets assume your segue is btnSegue.And if you need the segue to be performed based on some condition you can have following code
if(check)
{
[self performSegueWithIdentifier:#"btnSegue" sender:self];
}
Where check is BOOL which you can set true or false based on your condition.
I have a working code from a tutorial but don't understand it completely.
Situation:
After a button was pressed in my iPhone App
an AlertView appears with three buttons.
Now I like to check what button the user pressed.
CODE FROM THE TUTORIAL:
- (IBAction)infoButtonPressed:(id)sender {
UIAlertView *myAlert1 = [[UIAlertView alloc]initWithTitle:#"My Alert View 1"
message:#"Here we go"
delegate:self
cancelButtonTitle:#"Cancel"
otherButtonTitles:#"Option1", #"Option2", nil];
[alert show];
}
- (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex
{
NSLog(#"Button: %i, was pressed.", buttonIndex);
}
Code works, I see the correct output in the console as a NSLog but how is it possible
that the method:
- (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex
{
NSLog(#"Button: %i, was pressed.", buttonIndex);
}
refers to the correct alert view. In this case: myAlert1.
What about with more than one alert view.
For example a second one calling myAlert2.
I know the following code is not correct but it would make more sense to me
if I'd write the method as follow:
- (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex
{
NSLog(#"Button: %i, was pressed.", buttonIndex_FROM_myAlert1);
}
Hope you can help, drives me nuts.
Regards,
Marc
how is it possible that the method refers to the correct alert view?
For exactly that reason, the delegate method alertView:didDismissWithButtonIndex: actually tells you which alert view it refers to. Note that the method has two arguments. The second one tells you the button index and the first one points to the alert view this button index refers to.
If you have more than one alert view that share the same delegate, you will have to check against the first argument which alert view this is about. To be able to do that, you would have to store the alert views in an ivar/property or other data structure in order to remember them in the delegate method. (Or, since UIAlertView is a subclass of UIView, you could use the tag property to distinguish between multiple views).
i want to show the alert and when somebody click on OK they need to be send to the page before. How can i make this?
I use the following code:
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"BOOYAH!"
message:#"Saved" delegate:self cancelButtonTitle:#"OK" otherButtonTitles:nil];
[alert show];
Considering you have 1 option on the alert view and the delegate is self. Use this method in the same .m file as the code above
- (void)alertView:(UIAlertView *)alertV didDismissWithButtonIndex:(NSInteger)buttonIndex
{
//go back a page
[alertV autorelease];
}
Don't forget to release the alert view. I added it in the delegate method, but you can choose to release it right after showing it (only 1 release though)
Assign the UIAlertViewDelegate to self and then implement the following method is called
- (void) alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex
{
if (buttonIndex == buttonIndexForOK) { // Where buttonIndexForOK is the index for your ok button, in this case, that would be zero, but if you want an OK and a Cancel button this would be different.
// go back to the last page
}
}
UIAlertView follows the delegation design pattern that is extremely common in iOS development. You provide a delegate object, and when the object wants to tell you about something, it sends that delegate object a message.
In your code, you've provided self as the delegate. This means that this object needs to conform to the UIAlertViewDelegate protocol.
You will see that there are several methods you can implement to react to various events relating to the alert view. You should use the alertView:clickedButtonAtIndex: method, which provides an index parameter indicating which button was tapped.
I’m creating a tab based application. One of the tabs is test, and another of these tabs is results.
When the user has completed all the questions a UIAlertView message box pops up saying “Test Finished” and displays a “Ok” button to dismiss this message.
I’m wanting to change the title of this button to “Go to results” and can do this without any issues. But is there a way that enables me to direct the user to the results tab after clicking this message box button?
Any help would be appreciated. Thanks.
you have to set the selectedIndex of your UITabBarController
and you have to call this in the UIAlertViewDelegate method. So your method could look like this.
- (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex {
if (buttonIndex == alertView.cancelButtonIndex) {
// cancel... do nothing
}
else {
AppDelegate_Shared *appDelegate = [[UIApplication sharedApplication] delegate];
UITabBarController *tabBarController = appDelegate.tabBarController;
[tabBarController setSelectedIndex:0];
}
}
although, if you only have one button you don't need the if/else thingy.