我正在尝试通过parse.com文档中列出的app委托显示推送通知中包含的消息。
我遇到的问题是在我的第一个视图控制器的viewdidload方法中，我提出了一个警告，用户必须在使用该应用程序之前看到它。
在用户从viewdidload方法看到警报后，如何从我的app delegate调用该方法？
修改
所以，正如评论中所建议的那样，我添加了一个全局变量，一旦我从我的ViewDidload方法显示警报，我就设置为true，但是我的appDelegate的通知警告仍然没有出现。
这是我的app delegate.m文件：
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
// Override point for customization after application launch.
[Parse setApplicationId:@"xxxxxxxxxxxxxxxx"
clientKey:@"xxxxxxxxxxxx"];
// Register for Push Notitications, if running iOS 8
if ([application respondsToSelector:@selector(registerUserNotificationSettings:)]) {
UIUserNotificationType userNotificationTypes = (UIUserNotificationTypeAlert |
UIUserNotificationTypeBadge |
UIUserNotificationTypeSound);
UIUserNotificationSettings *settings = [UIUserNotificationSettings settingsForTypes:userNotificationTypes
categories:nil];
[application registerUserNotificationSettings:settings];
[application registerForRemoteNotifications];
} else {
// Register for Push Notifications before iOS 8
[application registerForRemoteNotificationTypes:(UIRemoteNotificationTypeBadge |
UIRemoteNotificationTypeAlert |
UIRemoteNotificationTypeSound)];
}
return YES;
NSDictionary *notificationPayload = launchOptions[UIApplicationLaunchOptionsRemoteNotificationKey];
if (Notification == true) {
if (![pushText isEqual: @""]) {
pushText = [[notificationPayload objectForKey:@"aps"] objectForKey:@"alert"];
UIAlertView *alert_news = [[UIAlertView alloc] initWithTitle:NSLocalizedString(@"News", "")
message:pushText
delegate:nil
cancelButtonTitle:@"Ok"
otherButtonTitles: nil];
[alert_news show];
}
}
}
这是我的viewdidload方法：
RoadSafetyAppAppDelegate *AppDelegate;
- (void)viewDidLoad
{
AppDelegate = (RoadSafetyAppAppDelegate *)[[UIApplication sharedApplication] delegate];
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
backgroundImage.alpha = 0.3;
toRecipients = [[NSArray alloc]initWithObjects:@"records@shellharbour.nsw.gov.au", nil];
static int appCounter;
if ( appCounter < 1 ) {
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:NSLocalizedString(@"Disclaimer", "")
message:NSLocalizedString(@"Using a mobile phone whilst driving is against the law. Ensure that you are not behind the wheel when using this app.", "")
delegate:nil
cancelButtonTitle:@"I agree to not use a mobile phone while driving"
otherButtonTitles: nil];
[alert show];
appCounter = appCounter+1;
AppDelegate.NotificationAlert = @"1";
AppDelegate.Notification = true;
}
}
答案 0 :(得分：4)
因为您希望在显示任何通知之前显示免责声明一次，并确保用户在同意按钮上看到并轻触。你可以使用简单的本地通知来做到这一点。
委托中的（... didFinishLaunchingWithOptions :)
-(BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions{
//......you code here
if ([[NSUserDefaults standardUserDefaults] boolForKey:@"disclaimerShown"]==nil)
[[NSUserDefaults standardUserDefaults] setBool:NO forKey:@"disclaimerShown"];
[[NSUserDefaults standardUserDefaults] synchronize];
}
//......you code here
if ([[NSUserDefaults standardUserDefaults] boolForKey:@"disclaimerShown"]){ //YES
if (![pushText isEqual: @""]) {
pushText = [[notificationPayload objectForKey:@"aps"] objectForKey:@"alert"];
UIAlertView *alert_news = [[UIAlertView alloc] initWithTitle:NSLocalizedString(@"News", "")
message:pushText
delegate:nil
cancelButtonTitle:@"Ok"
otherButtonTitles: nil];
[alert_news show];
}
}
}
-(void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification{
NSString *value=[NSString stringWithFormat:@"%@",[notification.userInfo valueForKey:@"key"]];
if ([value isEqualToString:@"disclaimerShown"]) {
[[NSUserDefaults standardUserDefaults] setBool:YES forKey:@"disclaimerShown"];
[[NSUserDefaults standardUserDefaults] synchronize];
///continue handle parse.com notification
}
}
：
-(void)viewDidLoad{
//...
if ([[NSUserDefaults standardUserDefaults] boolForKey:@"disclaimerShown"]==NO){
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:NSLocalizedString(@"Disclaimer", "")
message:NSLocalizedString(@"Using a mobile phone whilst driving is against the law. Ensure that you are not behind the wheel when using this app.", "")
delegate:nil
cancelButtonTitle:@"I agree to not use a mobile phone while driving"
otherButtonTitles: nil];
alert.tag = 1;
[alert show];
}
//...
}
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
if (alertView.tag == 1) {//the disclaimer alert
if (buttonIndex == 0) {
UILocalNotification *alarm = [[UILocalNotification alloc] init];
alarm.userInfo = @{@"key": @"disclaimerShown"};
alarm.fireDate = [NSDate date];
alarm.timeZone = [NSTimeZone defaultTimeZone];
[[UIApplication sharedApplication] scheduleLocalNotification:alarm];
}
}
}
答案 1 :(得分：2)
而不是AppDelegate bool flag属性使用 NSUserDefaults ;
在 AppDelegate 中更新此行：
if (Notification == true)
到
if ([[NSUserDefaults standardUserDefaults] boolForKey:@"Notification"] == YES)
在 ViewController - ＆gt;中viewDidLoad 方法更新行来自：
AppDelegate.Notification = true;
到
[[NSUserDefaults standardUserDefaults] setBool:YES forKey:@"Notification"];
[[NSUserDefaults standardUserDefaults] synchronize];
希望这有帮助。