After the user clicks a button I want an action sheet to come up asking for them to choose between two options. Once they have selected an option, I want an AlertView to come up telling them they will leave the application and have them choose to cancel to operation or continue to the other application.
Code is as follows:
.h
#import <UIKit/UIKit.h>
#import <MapKit/MapKit.h>
#interface mapView : UIViewController <MKMapViewDelegate, UIActionSheetDelegate, UIAlertViewDelegate>
#property (nonatomic, weak)IBOutlet MKMapView *mapView;
#property (nonatomic, weak)IBOutlet UIBarButtonItem *getDirections;
- (IBAction)selectDestination:(id)sender;
- (void)checkLeave;
#end
.m
- (IBAction)selectDestination:(id)sender
{
UIActionSheet *selectDestinationAS = [[UIActionSheet alloc] initWithTitle:#"Select Destination: " delegate:self cancelButtonTitle:#"Cancel" destructiveButtonTitle:nil otherButtonTitles:#"Destination 1", #"Destination 2", nil];
[selectDestinationAS showInView:self.view];
}
- (void)checkLeave
{
UIAlertView *checkLeaveAlert = [[UIAlertView alloc] initWithTitle:#"Leave CDSI?" message:#"This will open the Maps application to continue directions. Are you sure you want to continue?" delegate:self cancelButtonTitle:#"Cancel" otherButtonTitles:#"Open", nil];
[checkLeaveAlert show];
}
- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex
{
[self checkLeave];
if ([[actionSheet buttonTitleAtIndex:buttonIndex] isEqualToString: #"Destination 1"]) {
NSURL *BOHMDirections = [NSURL URLWithString:#"http://maps.apple.com/?daddr=Destination1&saddr=Current+Location"];
[[UIApplication sharedApplication] openURL:BOHMDirections];
} else if ([[actionSheet buttonTitleAtIndex:buttonIndex] isEqualToString: #"Destination 2"]) {
NSURL *BOPDirections = [NSURL URLWithString:#"http://maps.apple.com/?daddr=Destination2&saddr=Current+Location"];
[[UIApplication sharedApplication] openURL:BOPDirections];
}
}
The ActionSheet shows up, when an option is selected the Maps app opens (as desired) but the AlertView shows up only after you reenter the original app. How do I get it to show up before I leave the app?
Navigate to the external app on UIAlertView delegate.
To pass the selected item index at UIActionSheet, pass the index as parameter in checkLeave method and set as tag to the UIAlertView
By this way, the UI execution will be, on ActionSheet Clicked, the alertview ask confirmation with user. Once the user confirms, the navigation will be performed based on the action sheet selection. To hold, the action sheet selection, we are passing that data as tag.
If you need, you can add a private property to hold the item data clicked and access it in UIAlertViewDelegate.
- (void)checkLeave :(NSInteger)index
{
UIAlertView *checkLeaveAlert = [[UIAlertView alloc] initWithTitle:#"Leave CDSI?" message:#"This will open the Maps application to continue directions. Are you sure you want to continue?" delegate:self cancelButtonTitle:#"Cancel" otherButtonTitles:#"Open", nil];
[checkLeaveAlert setTag:index];
[checkLeaveAlert show];
}
- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex
{
[self checkLeave : buttonIndex];
}
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
if(alertView.tag == 1){
//Destination 1 clicked
}
}
Similar to the action sheet, UIAlertView has a delegate protocol that you should implement/comply with. Especially the method alertView:didDismissWithButtonIndex: is of interest.
Call the Maps app there and not in clickedButtonAtIndex
Related
I have an Iphone application in which when i am pressing a button it shows an alertview to chose the background.whichever background user is chosing will be played as the background of the audio clips.But now i need to add another alert before i am showing this alert for giving some warning.after that only i need to pop the second one.but i was done that chosing alert in the didappear of that viewcontroller and set it as a Uialertview delegate.and on the button actions i was doing different actions.Can anybody help me on achieving this?
proAlertView *loginav1=[[proAlertView alloc] initWithTitle:#"title" message:#"Choose a Background to play with this program?" delegate:self cancelButtonTitle:#"Cancel" otherButtonTitles:#"Field",#"Beach", #"Stars",nil];
[loginav1 setBackgroundColor:[UIColor colorWithRed:0.129 green:0.129 blue:0.129 alpha:1.0] withStrokeColor:[UIColor colorWithHue:0.625 saturation:0.0 brightness:0.8 alpha:0.8]];
[loginav1 show];
- (void)alertView:(UIAlertView *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex {
// the user clicked one of the OK/Cancel buttons
if (buttonIndex == 0)
{
//[self play];
//moviePlayer.scalingMode=MPMovieScalingModeAspectFill;
if(actionSheet.tag==123)
{
[self backButtonPressed];
}
}
else if (buttonIndex == 1)
{
videoFile = [[NSBundle mainBundle] pathForResource:#"video-track" ofType:#"mp4"];
[self play];
moviePlayer.scalingMode=MPMovieScalingModeAspectFill;
}
how can i include another alert before this is my question?
Initialize first Alertview
UIAlertView *al1 = [[UIAlertView alloc] initWithTitle:#"Warning!" message:#"Warning Msg!!!" delegate:self cancelButtonTitle:#"Ok" otherButtonTitles: nil];
al1.tag=1;
al1.delegate=self;
[al1 show];
Implement Delegate method
-(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{
if(alertView.tag==1){
// implement button events for first Alertview
if(buttonIndex==1){
//First button clicked of first Alertview
UIAlertView *al2 = [[UIAlertView alloc] initWithTitle:#"Choose BG" message:#"Choose BG?" delegate:self cancelButtonTitle:#"Cancel" otherButtonTitles:#"1",#"2",#"3", nil];
al2.tag=2;
al2.delegate=self;
[al2 show];
}
}
if(alertView.tag==2){
// implement button events for second Alertview
if(buttonIndex==1){
// First button clicked second Alertview.
}
}
}
Controller Class header
#interface ViewController : UIViewController<UIAlertViewDelegate>{
}
Hope this will fulfill your need !
You can do like this, first display warning message in alertview and when user click OK in alertview then in alertview delegate method write code to display second alertview where user can choose background.
I'm sort of stuck on a UIAlertViewStylePlainTextInput. (My code is too long to post here, but this is the part where the problem exists.) It all sort of works, but the program doesn't wait until the user enters the information before continuing. The "editName" button doesn't change the display in the code below, but the updateDisplay button works fine (if you've pressed the "editName" button before you pressed "updateDisplay"). How can I get everything to sort of halt until the user enters the info (or cancels). Or is there some other lead that will take me where I need to go. (I've been toying with putting the rest of the code in the -(void) alertView, but that just doesn't seem to be the correct way of doing it).
Thanks in advance.
#import "HSTestViewController.h"
#implementation HSTestViewController
#synthesize display;
NSString *newName;
- (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex
{
if (buttonIndex == 1)
{
newName = [[alertView textFieldAtIndex:0] text];
}
}
- (void) getNewName;
{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"You made the High Score List"
message:#"Please enter your name"
delegate:self
cancelButtonTitle:#"Cancel"
otherButtonTitles:#"Ok", nil];
alert.alertViewStyle = UIAlertViewStylePlainTextInput;
[alert show];
}
- (IBAction)editName:(id)sender
{
[self getNewName];
newName = display.text;
}
- (IBAction)updateDisplay:(id)sender
{
display.text = newName;
}
#end
Add UIAlertViewDelegate to the class. And implement the below delegate method.
OK button index value will be 1 in your case.
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
if (buttonIndex)
{
// call the method or the stuff which you need to perform on click of "OK" button.
}
}
Hope this helps.
I'm having a terrible time getting a UIAlertView to work within my custom NSObject class. In the research I've done it appears it should be possible but here's what I've run into.
First, here's my code:
-(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex {
NSLog(#"clickedButtonAtIndex: %d", buttonIndex);
}
-(void)testAlertView {
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:#"List Contains Items"
message:#"List contains items. Remove all items & delete?"
delegate:self
cancelButtonTitle:#"No"
otherButtonTitles:#"Yes", nil];
[alertView show];
}
If I set the delegate to self this code crashes as soon as I tap a button. If I set it to nil clickedButtonAtIndex is never called. I've tried with and without using the <UIAlertViewDelegate>.
I know someone will ask 'why are you doing this in NSObject instead of in your UIViewController?'. Primarily because I want to separate this code out so I can use it from multiple places in my app. But also because this is a small piece of a larger block of logic that makes sense to be on it's own.
Any ideas what I'm doing wrong?
Thanks,
Rich
I had the same problem using ARC. The root of the problem was the same. I solved it by putting my custom NSObject into a "strong" property to make sure the object exists as long as the calling object (an UIVIewCOntroller in my case) exists, so when the delegate of my alert view is called I still have my custom object around and the delegate method works fine.
Add the NSObject as strong property:
#import "Logout.h" // is NSObject
.
.
.
#property (nonatomic, strong) Logout *logout;
Then you will get the delegatemethods called in your NSObject.
Don´t forget to register the delegate for the UIAlertView:
#interface Logout () <UIAlertViewDelegate>
and in your method:
UIAlertView *a = [[UIAlertView alloc] initWithTitle:#"title"
message:#"message" delegate:self cancelButtonTitle:#"cancel"
otherButtonTitles:#"ok", nil];
[a show];
How To Present An Alert View Using UIAlertController When You Don't Have A View Controller. Detail description.
Yes, you can only use UIAlertController only in UIViewController classes. So how can we do it in NSObject classes. If you see the description link given above you will get to the answer. To summarise in a line for the above description: Create a new window above the the current window. This new window will be our viewController where we display alert. So using this viewController you can call the method [presentViewController: animated: completion:].
Answer:
dispatch_async(dispatch_get_main_queue(), ^{
UIWindow* window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
window.rootViewController = [UIViewController new];
window.windowLevel = UIWindowLevelAlert + 1;
NSString *msg=#“Your mssg";
UIAlertController* alertCtrl = [UIAlertController alertControllerWithTitle:#“Title" message:msg preferredStyle:UIAlertControllerStyleAlert];
[alertCtrl addAction:[UIAlertAction actionWithTitle:NSLocalizedString(#"Yes",#"Generic confirm") style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {
// do your stuff
// very important to hide the window afterwards.
window.hidden = YES;
}]];
UIAlertAction *cancelAction= [UIAlertAction actionWithTitle:#"cancel" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
window.hidden = YES;
}];
[alertCtrl addAction:cancelAction];
//http://stackoverflow.com/questions/25260290/makekeywindow-vs-makekeyandvisible
[window makeKeyAndVisible]; //The makeKeyAndVisible message makes a window key, and moves it to be in front of any other windows on its level
[window.rootViewController presentViewController:alertCtrl animated:YES completion:nil];
});
I have multiple alert views in one view, and I use this code to detect which button was pressed:
-(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex {
NSString *title = [alertView buttonTitleAtIndex:buttonIndex];
if ([title isEqualToString:#"OK"]) {
//for one alert view
[passCode becomeFirstResponder];
} else if ([title isEqualToString:#" OK "]) {
//for another alert view, had to change "OK" to " OK "
[passCodeConfirm becomeFirstResponder];
}
}
Now since there are multiple alert views in one view that do different things, I have to trick the user into thinking "OK" and " OK " are the same thing. It works and looks fine, but it feels kind of messy. Surely there is another way to do this, such as making this specific to an alert view, and then making it specific to another. Do you know how I would do this? Thanks!
It would be more technical as well better that set unique tag for separate UIAlertView and identify it and access in its delegate method.
For example,
UIAlertView *alert=[[UIAlertView alloc]initWithTitle:#"Message" message:#"Are You Sure you want to Update?" delegate:self cancelButtonTitle:#"Cancel" otherButtonTitles:#"Ok",nil];
[alert setTag:1];
[alert show];
[alert release];
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
if(alertView.tag == 1)
{
// set your logic
}
}
Use tag property to uniquely identify each of the alertview u create.
Like this
myAlertView.tag = 1
Then in the clickedButtonAtIndex delegate method check which alertview's button was clicked using this tag property ,
if(alertView.tag==1)
I wouldn't use the titles to distinguish between the buttons. You'll run into problems when your app is localized or you decide to change the button titles, but forget to update them everywhere. Use the button indexes instead or if you only have one button in addition to a cancel button, use the cancelButtonIndex property of UIAlertView.
To distinguish between multiple alert views, you could use their tag property.
In your view, add a property for each alert view.
UIAlertView *myAlertType1;
UIAlertView *myAlertType2;
#property (nonatomic, retain) UIAlertView *myAlertType1;
#property (nonatomic, retain) UIAlertView *myAlertType2;
Create your alert using these properties
self.myAlertType1 = [[[UIAlertView alloc] initWithTitle: ... etc] autorelease];
[self.myAlertType1 show];
Then in your delegate method:
-(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex {
if (alertView == myAlertType1) {
// check the button types and add behaviour for this type of alert
} else if (alertView == myAlertType2 {
// check the button types and add behaviour for the second type of alert
}
}
Edit: Although the above works, iApple's suggestion of using the tag seems cleaner/simpler.
//in your .h file
UIAlertView* alert1;
UIAlertView* alert2;
//in your .m file
// when you are showing your alerts, use
[alert1 show]; //or
[alert2 show];
//and just check your alertview in the below method
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
if(alertView == alert1)
{
//check its buttons
}
else //check other alert's btns
}
I'm going to have a link to a website in my app. The user will click on a button that says Website and an Alert will appear with 2 buttons. One of the buttons is just going to be a cancel button and the other button is going to open the website.
Could you help me with this?
Thanks!
put this into your header file:
#interface YourViewController : UIViewController <UIAlertViewDelegate>
put this into the class with your alert:
- (void)alertOKCancelAction {
// open a alert with an OK and cancel button
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"Open?" message:#"Open Website?" delegate:self cancelButtonTitle:#"Cancel" otherButtonTitles:#"Open", nil];
alert.tag = 1;
[alert show];
[alert release];
}
add this method:
- (void)alertView:(UIAlertView *)alert clickedButtonAtIndex:(NSInteger)buttonIndex
{
// the user clicked one of the OK/Cancel buttons
if(alert.tag == 1)
{
if(buttonIndex == alert.cancelButtonIndex)
{
NSLog(#"cancel");
}
else
{
NSLog(#"ok");
[[UIApplication sharedApplication] openURL:[NSURL URLWithString: #"http://www.google.com"]];
}
}
}