ios7

问题 I'm using the new background fetch mode in iOS 7, In my users' crash logs I'm seeing a lot of: MyApp[11893] has active assertions beyond permitted time: {( <BKProcessAssertion: 0x176afef0> identifier: Background Content Fetching (3281) process: MyApp[11893] permittedBackgroundDuration: 30.000000 reason: backgroundContentFetching owner pid:33 preventSuspend preventThrottleDownUI preventIdleSleep preventSuspendOnSleep )} I assume I'm getting this because my update is taking longer than the

问题 I'm drawing some simple bezier paths, but I'm finding it impossible to remove the spikes created when the angle between line segments is small: (Note: The circle is from a separate drawing operation, but I'm trying to make sure the line does not spike past the circle...). I've tried all kinds of variations of lineCapStyle and lineJoinStyle but nothing seems to work. In addition to what is shown below I have tried using a Miter Join with 'setMiterLimit'. Here's my line drawing code snip:

问题 I want to disconnect a phone call programatically in iOS7 . I know we can programmatically handle the interruptions for Incoming calls, SMS etc. on iPhone (without Appstore). I have to create a launch daemon to get notifications as CTCallCenter doesn't deliver the notifications to UIApplications in the background as explained by Nate in his Answer. Nate 's comments shows there is some scope of disconnecting certain calls on an iPhone using the launch daemon (without Appstore). So, My first

问题 I am having some weird animation issues. I called presentViewController with animation set to YES but the animation is not present when the view controller is being presented. And the weirdest thing is all animations throughout the app are gone! So basically my setup is like this UINavigationController has child view controller - childVC I have childViewController to call presentViewController - presentVC and have a delegate callback method for childViewController to dismiss presentVC . One

问题 The below code will work fine with 500 records, we are batching the operation and commit the eventstore after adding 500 records. EKEventStore *eventStore = [[EKEventStore alloc] init]; for(int i=0 ; i< 500 ; i++){ EKCalendar *calendarDef = [eventStore defaultCalendarForNewEvents]; EKEvent *event = [EKEvent eventWithEventStore:eventStore]; [event setCalendar:calendarDef]; //set values to this event. like title, notes, startDate, endDate, location event.title = [NSString stringWithFormat:@

问题 App crashes at run under 7.1 simulator or device and runs fine on both with in 8.1 with StackTrace: appName[10676:607] *** -[NSKeyedUnarchiver initForReadingWithData:]: data is empty; did you forget to send -finishEncoding to the NSKeyedArchiver? appName[10676:607] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: '(null)' *** First throw call stack: ( 0 CoreFoundation 0x007a91e4 __exceptionPreprocess + 180 1 libobjc.A.dylib 0x005258e5 objc_exception

问题 I made a subclass of UITabBarController that adds a custom UIView on top of tabs to replace the default badging on a UITabBarItem. I add these custom badgeviews on viewDidLoad of my custom UITabBarController. [self.view addSubview:_tabBarItem1BadgeView]; The drawRect on my custom tabBarBadgeView looks like this: - (void)drawRect:(CGRect)rect{ CGContextRef ctx = UIGraphicsGetCurrentContext(); // Badge CGSize size = self.frame.size; CGSize badgeSize = [self sizeThatFits:size]; badgeSize.height

问题 I have two viewControllers ServiceProvider WorkLocation In ServiceProvider I have one text field and a pick button. When user click on pick button it will redirect to WorkLocation which has a list of location s. When user select any location and then click on pick button from WorkLocation it will redirect back to ServiceProvider page with locationName and Id . And in ServiceProvider page locationName will be displayed in the text field which is already there. To perform this I am using a

问题 Problem is once I am generating UUID its working for me. But if me/user delete the application than UUID is not same like i have generated before. There is no uniqueness here if we are using uuid as identifier. Please help me to solve this issue.How can i get same uuid or any string if application reinstalled. Thanks in advance.. I am using this approach: NSString *udid; if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"6.0")) udid = [UIDevice currentDevice].identifierForVendor.UUIDString; else

问题 How to Convert NSDictionary into JSON ? I have posted a dictionary into server using json. And in the time receiving the data from the server using GET method. the data cant be accessed using normal key calling method like _secretanswer.text=[[NSString alloc]initWithFormat:@"%@",[customfield objectForKey:@"secanswer"]]; the server returning a NCFString as the result. How to convert and post a NSDictionary in the JSON format? 回答1: NSError * error; NSData * jsonData = [NSJSONSerialization