xcode How to link UIAlertview action to another viewcontroller? - xcode

Im am trying to link one of my buttons from the UIAlertView that pops up so that It changes to another viewcontroller. Basically, the cancel already works, but when Next is clicked it doesnt, and i don't know how to link to another viewcontroller. Please help.
#import "ViewController.h"
#interface ViewController() <UIAlertViewDelegate>
#end
#implementation ViewController
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (IBAction)clickButton:(id)sender {
UIAlertView *alert = [[UIAlertView alloc] initWithTitle: #"Test" message: #"Message" delegate: self cancelButtonTitle:#"Cancel" otherButtonTitles:#"Redeem", nil];
[alert show];
}
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{
if(buttonIndex == 1){ //Next
UIViewController* newView = [[UIViewController alloc] init];
[self presentViewController:newView animated:YES completion:nil];
}
}
#end

It is working...Just create object of viewcontroller that you want to present instead of
UIViewController* newView = [[UIViewController alloc] init];
like
SecondViewController * newView = [[SecondViewController alloc] initWithNibName:#"SecondViewController" bundle:nil];
if you are using xib.
Or
SecondViewController * newView = [self.storyboard instantiateViewControllerWithIdentifier:#"SecondViewController"];
if you are using storyboard(if you want to go through coding).
and then write
[self presentViewController:newView animated:YES completion:nil];
line.

Related

UIAlertController Warning Message

I am using the below code for UIAlertController in my project.
if([[[UIDevice currentDevice] systemVersion]floatValue] >= 8.0){
UIAlertController * alert= [UIAlertController
alertControllerWithTitle:#"Input Error"
message:#"Please enter a valid email."
preferredStyle:UIAlertControllerStyleAlert];
UIAlertAction* okAction = [UIAlertAction
actionWithTitle:#"OK"
style:UIAlertActionStyleDefault
handler:^(UIAlertAction * action)
{
[alert dismissViewControllerAnimated:YES completion:nil];
}];
[alert addAction:okAction];
[self presentViewController:alert animated:YES completion:nil];
}
else
{
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:#"Input Error"
message:#"Please enter a valid email"
delegate:self
cancelButtonTitle:#"OK"
otherButtonTitles:nil, nil];
[alertView show];
}
I am getting the below waring message:
Warning: Attempt to present <UIAlertController: 0x7f8da58df1f0> on <MBComplaintsViewController: 0x7f8da36454d0> which is already presenting (null)
Kindly guide me how to properly use UIAlertController using Objective C.
Thanks,
Abin Koshy Cheriyan
Yes as per #Alexander you should not be dismissing the alert controller like this explicitly.
As per an apple engineer a new window gets added each time an UIAlertController is displayed so when we go for dismissing it the window is still there though the alert controller disappears.
So there are two ways to handle this -
Way 1 - No explicit dismiss
Do not explicitly dismiss the UIAlertController, let it be done by the user
Way 2 - Use your own window
Simply create a category on UIAertController
Here is the sample code -
.h
#import <UIKit/UIKit.h>
#interface UIAlertController (MyAdditions)
#property(nonatomic,strong) UIWindow *alertWindow;
-(void)show;
#end
In .m
#import "UIAlertController+MyAdditions.h"
#import <objc/runtime.h>
#implementation UIAlertController (MyAdditions)
#dynamic alertWindow;
- (void)setAlertWindow:(UIWindow *)alertWindow {
objc_setAssociatedObject(self, #selector(alertWindow), alertWindow, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
- (UIWindow *)alertWindow {
return objc_getAssociatedObject(self, #selector(alertWindow));
}
- (void)show {
self.alertWindow = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
self.alertWindow.rootViewController = [[UIViewController alloc] init];
// window level = topmost + 1
UIWindow *topWindow = [UIApplication sharedApplication].windows.lastObject;
self.alertWindow.windowLevel = topWindow.windowLevel + 1;
[self.alertWindow makeKeyAndVisible];
[self.alertWindow.rootViewController presentViewController:self animated:YES completion:nil];
}
-(void)hide {
self.alertWindow.hidden = YES;
self.alertWindow = nil;
}
- (void)viewDidDisappear:(BOOL)animated {
[super viewDidDisappear:animated];
// just to ensure the window gets desroyed
self.alertWindow.hidden = YES;
self.alertWindow = nil;
}
To show the alert controller
UIAlertCntroller *alert = ## initialisation##;
// will show the alert
[alert show];
//to dismiss
[alert hide];
[alert dismissViewControllerAnimated:YES completion:nil];
Even you can checkout one of my sample implementation here
I don't know about your problem, but you shouldn't do that
handler:^(UIAlertAction * action)
{
[alert dismissViewControllerAnimated:YES completion:nil];
}];
It will be anyway dismissed on any of your actions.

UIImagePickerController crashes on launch

I present a viewcontroller to the user with a view that shows a UIButton to record a video. When the user presses the button, my app crashes with the following error:
Terminating app due to uncaught exception 'UIApplicationInvalidInterfaceOrientation', reason: 'preferredInterfaceOrientationForPresentation must return a supported interface orientation!'
My app only supports portrait orientation and the info.plist file reflects properly. I use the same code in another app, found on Ray Wenderlich's site, and it works great. The code for the .h and .m files is below. Any help would be appreciated.
.h
#import <MediaPlayer/MediaPlayer.h>
#import <MobileCoreServices/UTCoreTypes.h>
#import <AssetsLibrary/AssetsLibrary.h>
#interface RecordSwingViewController: UIViewController
-(BOOL)startCameraControllerFromViewController:(UIViewController*)controller
usingDelegate:(id )delegate;
-(void)video:(NSString *)videoPath didFinishSavingWithError:(NSError *)error contextInfo:(void*)contextInfo;
#property (weak, nonatomic) IBOutlet UIButton *record;
- (IBAction)recordSwing:(id)sender;
#end
.m
#import "RecordSwingViewController.h"
#interface RecordSwingViewController ()
#end
#implementation RecordSwingViewController
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (IBAction)recordSwing:(id)sender {
[self startCameraControllerFromViewController:self usingDelegate:self];
}
-(BOOL)shouldAutorotate
{
return NO;
}
-(BOOL)startCameraControllerFromViewController:(UIViewController*)controller
usingDelegate:(id )delegate {
// 1 - Validattions
if (([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera] == NO)
|| (delegate == nil)
|| (controller == nil)) {
return NO;
}
// 2 - Get image picker
UIImagePickerController *cameraUI = [[UIImagePickerController alloc] init];
cameraUI.sourceType = UIImagePickerControllerSourceTypeCamera;
// Displays a control that allows the user to choose movie capture
cameraUI.mediaTypes = [[NSArray alloc] initWithObjects:(NSString *)kUTTypeMovie, nil];
// Hides the controls for moving & scaling pictures, or for
// trimming movies. To instead show the controls, use YES.
cameraUI.allowsEditing = NO;
cameraUI.delegate = delegate;
// 3 - Display image picker
[controller presentViewController: cameraUI animated: YES completion:nil];
return YES;
}
-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
NSString *mediaType = [info objectForKey: UIImagePickerControllerMediaType];
[self dismissViewControllerAnimated:NO completion:nil];
// Handle a movie capture
if (CFStringCompare ((__bridge_retained CFStringRef) mediaType, kUTTypeMovie, 0) == kCFCompareEqualTo) {
NSString *moviePath = [[info objectForKey:UIImagePickerControllerMediaURL] path];
if (UIVideoAtPathIsCompatibleWithSavedPhotosAlbum(moviePath)) {
UISaveVideoAtPathToSavedPhotosAlbum(moviePath, self,
#selector(video:didFinishSavingWithError:contextInfo:), nil);
}
}
}
-(void)video:(NSString*)videoPath didFinishSavingWithError:(NSError*)error contextInfo:(void*)contextInfo {
if (error) {
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"Error" message:#"Video Saving Failed"
delegate:nil cancelButtonTitle:#"OK" otherButtonTitles:nil];
[alert show];
} else {
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"Video Saved" message:#"Saved To Photo Album"
delegate:self cancelButtonTitle:#"OK" otherButtonTitles:nil];
[alert show];
}
}
#end
Ok, here is the answer, finally.
https://stackoverflow.com/a/12570501/2133494
Basically I needed to add a category to my UIImagePickerController. I tried a lot of other fixes but this worked.
You have implemented the bool for autorotation, but did not specify if it does not auto rotate what else it should do. Try the following after autorotate method.
-(NSUInteger)supportedInterfaceOrientations
{
return UIInterfaceOrientationMaskLandscapeRight | UIInterfaceOrientationMaskLandscapeLeft | UIInterfaceOrientationMaskPortrait | UIInterfaceOrientationMaskPortraitUpsideDown;
}
Please remove any of the masks you don't need from the method above and see if this works for you.

How to make actionsheet go to another view? Xcode, small issue,,,

I am trying to make an actionsheet for another button but I get two errors: "No visible #interface for 'UIstoryboard' declares the selector 'InitiateViewControll:' and, "No visible #interface for SWViewController' declares the selector 'presentViewController:animated:' I was giving this code so is there any names that I need to name in this to make this code costomized for my code? I am trying to learn i am a noob sorry :( here is the code I have so far:
- (IBAction)OpenActionSheetButton:(id)sender {
UIActionSheet *actionsheet = [[UIActionSheet alloc]initWithTitle:#"There is no going back, are you sure???" delegate:self cancelButtonTitle:#"Cancel" destructiveButtonTitle:#"Continue" otherButtonTitles:nil, nil];
[actionsheet showInView:self.view];
}
-(void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex
{
if (buttonIndex == 0) {
UIViewController *controller = [self.storyboard instantiateViewControll:#"storyboardViewName"];
//Push
[self.navigationController pushViewController:controller animated:YES];
//Modal
[self presentViewController:controller animated:YES];
}
}
Please help guys?
Try out this code..And SWViewController must have a Navigation Controller
-(void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex
{
if(buttonIndex == 0)
{
UIViewController *controller = [self.storyboard instantiateViewControllerWithIdentifier:#"storyboardViewIdentifier"];
//storyboardViewIdentifier is the ViewController identifier you specify in the storyboard
//PUSH
[self.navigationController pushViewController:controller animated:YES];
//Modal
[self presentViewController:controller animated:YES completion:Nil];
}
}
Try this. It works for me:
if(buttonIndex == 0)
{
NSString * storyboardName = #"Main";
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:storyboardName bundle: nil];
Paypal_ViewController * vc = [storyboard instantiateViewControllerWithIdentifier:#"Paypal_ViewController"];
[self presentViewController:vc animated:YES completion:nil];
}

Building Ipad app and once i added a modal view my bool errors out

I am erroring out with Bool and before I added a modal view and now it says bool is undefined. I dont understand why that is unless its because I'm using another nib for my modal view.
Do I need to call or change my boon now. Please advise.
//
// UrbanAgentViewController.m
// UrbanAgent
//
// Created by Dwayne Stephens on 4/2/12.
// Copyright 2012 __MyCompanyName__. All rights reserved.
//
#import "UrbanAgentViewController.h"
#import "NewContactController.h"
#implementation UrbanAgentViewController
// our own buttonTapped method
-(IBAction) buttonTapped: (id) sender {
NewContactController *ivc = [[NewContactController alloc] init];
ivc.delegate = self;
UINavigationController *nc = [[UINavigationController alloc]
initWithRootViewController:ivc];
[self presentModalViewController:nc animated:YES];
[ivc release];
[nc release];
}
-(void) doneButtonPressed: (NSArray *) values
{
[self dismissModalViewControllerAnimated:YES];
NSString *message =
[[NSString alloc]
initWithFormat:#"The values were %#, %#, %#, %#, %#, and %#",
[values objectAtIndex:0], [values objectAtIndex:1], [values objectAtIndex:2],
[values objectAtIndex:3], [values objectAtIndex:4], [values objectAtIndex:5]];
UIAlertView *alert =
[[UIAlertView alloc] initWithTitle:#"Values Passed"
message:message delegate:nil
cancelButtonTitle:#"Excellent!" otherButtonTitles:nil ];
[alert show];
[alert release];
[message release];
/*
// The designated initializer. Override to perform setup that is required before the view is loaded.
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
*/
/*
// Implement loadView to create a view hierarchy programmatically, without using a nib.
- (void)loadView {
}
*/
/*
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad {
[super viewDidLoad];
}
*/
// Override to allow orientations other than the default portrait orientation.
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
return YES;
}
- (void)didReceiveMemoryWarning {
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
// Release any cached data, images, etc that aren't in use.
}
- (void)viewDidUnload {
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}
- (void)dealloc {
[super dealloc];
}
#end
You need a closing curly brace on doneButtonPressed:.

Init a UInavigationbar

I am having trouble in making a tableview with navigation bar or controller on top.
I have this piece of code,
- (void)viewDidLoad {
[super viewDidLoad];
UINavigationController *addNavCon = [[UINavigationController alloc]initWithNibName:#"Welcome" bundle:nil];
self.navigationItem.rightBarButtonItem = self.addButtonItem;
self.navigationItem.leftBarButtonItem = self.editButtonItem;
[self createEditableCopyOfDatabaseIfNeeded];
[[NSNotificationCenter defaultCenter] addObserver:self selector:#selector(applicationWillTerminate:) name:UIApplicationWillTerminateNotification object:nil];
NSString *documentDirectory = [self applicationDocumentsDirectory];
NSString *path = [documentDirectory stringByAppendingPathComponent:#"notebook.plist"];
NSMutableArray *tmpArray = [[NSMutableArray alloc] initWithContentsOfFile:path];
self.Notes = tmpArray;
[tmpArray release];
}
However, the navigation bar never show up, while the table is doing fine. May i know what's the problem with the code?
Many thanks
You have created an instance of UINavigationController but never added it to anything. You need to add it to the current hierarchy or it will not appear.
If you wish to add the navController to the entire app, then you should do this in the App Delegate by
- (void)applicationDidFinishLaunching:(UIApplication *)application
{
UIViewController *rootController = [[MyRootViewController alloc] init];
UINavigationController *navigationController = [[UINavigationController alloc]
initWithRootViewController:rootController];
[rootController release];
window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
[window addSubview:navigationController.view];
[window makeKeyAndVisible];
}

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