可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):
问题:
I have tried several ways to use UIAlertController,instead of UIAlertView. I tried several ways but I cannot make the alert action work. Here is my code that works fine in IOS 8 and IOS 9 but is showing up with deprecated flags. I tried the elegant suggestion below but I can't make it function in this context. I need to submit my app and this is the last thing to address. Thank You for any further suggestions. I am a newbie.
#pragma mark - BUTTONS ================================ - (IBAction)showModesAction:(id)sender { NSLog(@"iapMade: %d", iapMade3); // IAP MADE ! =========================================== if (!iapMade3) { //start game here gamePlaysCount++; [[NSUserDefaults standardUserDefaults]setInteger:gamePlaysCount forKey:@"gamePlaysCount"]; NSLog(@"playsCount: %ld", (long)gamePlaysCount); if (gamePlaysCount >= 4) { UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"Basic" message: THREE_PLAYS_LIMIT_MESSAGE delegate:self cancelButtonTitle:@"Yes, please" otherButtonTitles:@"No, thanks", nil]; [alert show]; NSString *path = [[NSBundle mainBundle] pathForResource:@"cow" ofType:@"wav"]; _pop =[[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL]; [_pop play]; [self dismissViewControllerAnimated:true completion:nil]; } else { if (gamePlaysCount == 1) { // Create & store the next 5 mins when player gets 3 more lives nextDateToPlay = [[NSDate date] dateByAddingTimeInterval:60*60*0.1]; NSLog(@"CURRENT DATE: %@", [NSDate date]); NSLog(@"NEXT DAY: %@", nextDateToPlay); [[NSUserDefaults standardUserDefaults]setObject: nextDateToPlay forKey:@"nextDateToPlay"]; NSLog(@"nextDateToPlay: %@", nextDateToPlay); UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"Basic" message: THREE_PLAYS_LIMIT_MESSAGE2 delegate:self cancelButtonTitle:@"Got it!" otherButtonTitles:@"Start", nil]; [alert show]; } else { if (gamePlaysCount == 3) { UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"Basic" message: THREE_PLAYS_LIMIT_MESSAGE3 delegate:self cancelButtonTitle:@"Yep, I Know!" otherButtonTitles:@"Start", nil]; [alert show]; } } } } } // IAP NOT MADE ============================= #pragma mark - ALERTVIEW DELEGATE ============================ -(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex { if ([[alertView buttonTitleAtIndex:buttonIndex] isEqualToString:@"Yes, please"]) { UIStoryboard *storyboard = self.storyboard; MenuViewController *svc = [storyboard instantiateViewControllerWithIdentifier:@"Store"]; svc.modalTransitionStyle = UIModalTransitionStyleCrossDissolve; [self presentViewController:svc animated:YES completion:nil]; } }
回答1:
From iOS8 Apple provide new UIAlertController class which you can use instead of UIAlertView which is now deprecated, its is also stated in depreciation message
UIAlertView is deprecated. Use UIAlertController with a preferredStyle of UIAlertControllerStyleAlert instead
So you should use something like this
UIAlertController * alert = [UIAlertController alertControllerWithTitle:@"Title" message:@"Message" preferredStyle:UIAlertControllerStyleAlert]; UIAlertAction* yesButton = [UIAlertAction actionWithTitle:@"Yes, please" style:UIAlertActionStyleDefault handler:^(UIAlertAction * action) { //Handle your yes please button action here }]; UIAlertAction* noButton = [UIAlertAction actionWithTitle:@"No, thanks" style:UIAlertActionStyleDefault handler:^(UIAlertAction * action) { //Handle no, thanks button }]; [alert addAction:yesButton]; [alert addAction:noButton]; [self presentViewController:alert animated:YES completion:nil];
回答2:
//Calling [self showMessage:@"There is no internet connection for this device" withTitle:@"Error"]; //Method -(void)showMessage:(NSString*)message withTitle:(NSString *)title { UIAlertController * alert= [UIAlertController alertControllerWithTitle:title message:message preferredStyle:UIAlertControllerStyleAlert]; UIAlertAction *okAction = [UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action){ //do something when click button }]; [alert addAction:okAction]; UIViewController *vc = [[[[UIApplication sharedApplication] delegate] window] rootViewController]; [vc presentViewController:alert animated:YES completion:nil]; }
If you want to use this alert in NSObject class you should use like:
-(void)showMessage:(NSString*)message withTitle:(NSString *)title{ dispatch_async(dispatch_get_main_queue(), ^{ UIAlertController *alertController = [UIAlertController alertControllerWithTitle:title message:message preferredStyle:UIAlertControllerStyleAlert]; [alertController addAction:[UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) { }]]; [[[[UIApplication sharedApplication] keyWindow] rootViewController] presentViewController:alertController animated:YES completion:^{ }]; }); }
回答3:
Swift version of new implementation is :
let alert = UIAlertController(title: "Oops!", message:"your message", preferredStyle: .Alert) alert.addAction(UIAlertAction(title: "Okay.", style: .Default) { _ in }) self.presentViewController(alert, animated: true){}
回答4:
Xcode 8 + Swift
Assuming self is a UIViewController:
func displayAlert() { let alert = UIAlertController(title: "Test", message: "I am a modal alert", preferredStyle: .alert) let defaultButton = UIAlertAction(title: "OK", style: .default) {(_) in // your defaultButton action goes here } alert.addAction(defaultButton) present(alert, animated: true) { // completion goes here } }
回答5:
Use UIAlertController instead of UIAlertView
-(void)showMessage:(NSString*)message withTitle:(NSString *)title { UIAlertController * alert= [UIAlertController alertControllerWithTitle:title message:message preferredStyle:UIAlertControllerStyleAlert]; UIAlertAction *okAction = [UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action){ //do something when click button }]; [alert addAction:okAction]; UIViewController *vc = [[[[UIApplication sharedApplication] delegate] window] rootViewController]; [vc presentViewController:alert animated:YES completion:nil]; }
回答6:
Make UIAlertController+AlertController Category as:
UIAlertController+AlertController.h
typedef void (^UIAlertCompletionBlock) (UIAlertController *alertViewController, NSInteger buttonIndex); @interface UIAlertController (AlertController) + (instancetype)showAlertIn:(UIViewController *)controller WithTitle:(NSString *)title message:(NSString *)message cancelButtonTitle:(NSString *)cancelButtonTitle otherButtonTitles:(NSString *)otherButtonTitle tapBlock:(UIAlertCompletionBlock)tapBlock; @end
UIAlertController+AlertController.m
@implementation UIAlertController (NTAlertController) + (instancetype)showAlertIn:(UIViewController *)controller WithTitle:(NSString *)title message:(NSString *)message cancelButtonTitle:(NSString *)cancelButtonTitle otherButtonTitles:(NSString *)otherButtonTitle tapBlock:(UIAlertCompletionBlock)tapBlock { UIAlertController *alertController = [self alertControllerWithTitle:title message:message preferredStyle:UIAlertControllerStyleAlert]; if(cancelButtonTitle != nil) { UIAlertAction *cancelButton = [UIAlertAction actionWithTitle:cancelButtonTitle style:UIAlertActionStyleCancel handler:^(UIAlertAction *action) { tapBlock(alertController, ALERTACTION_CANCEL); // CANCEL BUTTON CALL BACK ACTION }]; [alertController addAction:cancelButton]; } if(otherButtonTitle != nil) { UIAlertAction *otherButton = [UIAlertAction actionWithTitle:otherButtonTitle style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) { tapBlock(alertController, ALERTACTION_OTHER); // OTHER BUTTON CALL BACK ACTION }]; [alertController addAction:otherButton]; } [controller presentViewController:alertController animated:YES completion:nil]; return alertController; } @end
in your ViewController.m
[UIAlertController showAlertIn:self WithTitle:@"" message:@"" cancelButtonTitle:@"Cancel" otherButtonTitles:@"Other" tapBlock:^(UIAlertController *alertController, NSInteger index){ if(index == ALERTACTION_CANCEL){ // CANCEL BUTTON ACTION }else if(index == ALERTACTION_OTHER){ // OTHER BUTTON ACTION } [alertController dismissViewControllerAnimated:YES completion:nil]; }];
NOTE: If you want to add more than two buttons then add another more UIAlertAction to the UIAlertController.
回答7:
I tried the above methods, and no one can show the alert view, only when I put the presentViewController: method in a dispatch_async sentence:
dispatch_async(dispatch_get_main_queue(), ^ { [self presentViewController:alert animated:YES completion:nil]; });
Refer to Alternative to UIAlertView for iOS 9?.
回答8:
Check this:
UIAlertController *alertctrl =[UIAlertController alertControllerWithTitle:@"choose Image" message:nil preferredStyle:UIAlertControllerStyleActionSheet]; UIAlertAction *camera =[UIAlertAction actionWithTitle:@"camera" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) { [self Action]; //call Action need to perform }]; [alertctrl addAction:camera]; -(void)Action { }
