uiapplicationdelegate

问题 I am calling UIAlert with 2 buttons "Cancel" and "OK" in MyapplicationAppDelegate.m file , the alert is called but on tap of "Cancel" or "OK" button -(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex method is not called. I have added UIAlertViewDelegate in the MyapplicationAppDelegate.h file as below #import UIKit/UIKit.h @interface MyapplicationAppDelegate: NSObject UIApplicationDelegate,UIAlertViewDelegate { .. } I want to know what else is required. 回答1:

问题 I am implementing an AdMob banner in my app for a single UIViewController , and it is working. But I have so many views and I want to show a banner on every screen. How would I implement a banner that would appear on every screen? I am trying this in my AppDelegate.swift : dispatch_async(dispatch_get_main_queue(), { print("Google Mobile Ads SDK version: \(GADRequest.sdkVersion())") // bannerView.frame = CGRectMake(0, 0, 320, 50) // self.bannerView.adSize = kGADAdSizeBanner self.bannerView

问题 I have an app with multiple UITableViews and am in the process of implementing iADs. Per the Apple documentation (http://developer.apple.com/library/ios/#technotes/tn2286/_index.html#//apple_ref/doc/uid/DTS40011212) I have created a shared banner that belongs to my app delegate and the application delegate is also the banner's delegate. This works well and the ads show nicely across the various view controllers AFTER the banner is loaded and the user switches screens. The problem is that

问题 I'm hoping to find a method to pass certain information in to my app when I launch it during testing, so that I can perform special debug tasks. Xcode has a section "Arguments Passed on Launch", and I assumed they would show up in my UIApplicationDelegate's application:didFinishLaunchingWithOptions: but the dictionary that's passed in is always nil. Am I going about this the wrong way? 回答1: You can access them using NSProcessInfo object like this, NSArray * arguments = [[NSProcessInfo

问题 I am using core location framework inside my application and I set the location string in UIBackgroundMode or Required background modes(in Xcode 4.2) for getting the updated location from didUpdateToLocation method when app is running in background and also sending this updated location to server by hitting the specific link inside didUpdateToLocation method of core location framework. My question is that will the app be terminated after some time when running in background or not? 回答1: No,

问题 Can a scenario happen where applicationWillResignActive: will be called before application:didFinishLaunchingWithOptions: ends ? Basically, can I count on application:didFinishLaunchingWithOptions: to always be done before applicationWillResignActive is triggered for the first time? 回答1: Apple's iOS App Programming Guide in the "App States and Multitasking" Section, indicates applicationWillResignActive: is called as part of your application's handling of events through processing the run

问题 My app has different behavior when becoming active from the lockscreen (locked while active), or becoming active from anything else. On iOS 6 and lower I could detect this UIApplicationState state = [[UIApplication sharedApplication] applicationState]; if (UIApplicationStateInactive == state) // Coming from locked screen (iOS 6) else // Coming from Springboard, another app, etc... But on iOS 7, the state value is UIApplicationStateBackground in both scenarios. Is this the intended behavior?

问题 Often times I initialize my model class variables in my AppDelegate so they can be used by different ViewControllers without passing their instance across class files. However, every time I import AppDelegate into a .m file to access these variable's data I feel like I'm doing some wrong. Is this the the correct way for accessing these variables or should I be doing something differently? EDIT: My problem isn't how to access the variables. I currently use this line of code to get my

问题 I am making an object of AppDelegate and using it throughout my program, and I have declared all setters and getters, and also insert, select, delete, update queries of database in it. I want to ask that is it a good practice to do so, if yes, then how, and if no then why it is not a good practice? I hope my question is clear, please ask relating questions if you have any. 回答1: It's not a good strategy to turn your AppDelegate into a "big ball of mud" that contains a million methods and

问题 I am building a utility-based application, the data is stored in the MainViewController , and now I know how to pass data to the FlipsideViewController (many regards to this thread BTW, Sending data from Mainview to Flipside?). But I am getting the data onto an subview (subclass of UIView ) that I have added to the flipside view. How can I pass data to this subview? I saw there is already a delegate and protocol set up in the FlipsideViewController.h , I am really new to the delegate sort of