nsdate

I have several date strings that I need to convert to NSDates. My parsing code is the following: NSString *s = [pair objectForKey:@"nodeContent"]; NSDateFormatter *f = [[NSDateFormatter alloc] init]; [f setDateFormat:@"yyyy-MM-dd'T'HH:mm:ssZZ"]; self.date = [f dateFromString:s]; The above code works fine in all the devices and simulators we've tested. The strange thing is that when the above code runs on any iPhone 5 running iOS 6.1 or 7.0.x , the line self.date = [f dateFromString:s]; returns nil every time. I have checked and the string s exists and contains the same characters when compared

I'm trying to print out the date in a certain format: NSDate *today = [[NSDate alloc] init]; NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; [dateFormatter setDateFormat:@"yyyyMMddHHmmss"]; NSString *dateStr = [dateFormatter stringFromDate:today]; If the iPhone is set to 24 hour time, this works fine, if on the other hand the user has set it to 24 hour time, then back to AM/PM (it works fine until you toggle this setting) then it appends the AM/PM on the end even though I didn't ask for it: 20080927030337 PM Am I doing something wrong or is this a bug with firmware 2.1? Edit 1

I am attempting to sort an NSArray that is populated with custom objects. Each object has a property startDateTime that is of type NSDate. The following code results in an array, sortedEventArray , populated but not sorted. Am I going about this the completely wrong way or am I just missing something small? NSSortDescriptor *dateDescriptor = [NSSortDescriptor sortDescriptorWithKey:@"startDateTime" ascending:YES]; NSArray *sortDescriptors = [NSArray arrayWithObject:dateDescriptor]; NSArray *sortedEventArray = [nodeEventArray sortedArrayUsingDescriptors:sortDescriptors]; Are you sure that the

How can you determine the hour, minute and second from NSDate class in Swift 3? In Swift 2: let date = NSDate() let calendar = NSCalendar.currentCalendar() let components = calendar.components(.Hour, fromDate: date) let hour = components.hour Swift 3? In Swift 3.0 Apple removed 'NS' prefix and made everything simple. Below is the way to get hour, minute and second from 'Date' class (NSDate alternate) let date = Date() let calendar = Calendar.current let hour = calendar.component(.hour, from: date) let minutes = calendar.component(.minute, from: date) let seconds = calendar.component(.second,