I am just trying to make a timer. I would like to use UIDatePickerModeCountDownTimer
mode of the UIDatePicker
, so that when the user simply selects say 15 mins in the picker, they are passed back to a screen that shows the value of 15 mins in a label that they can then count down from.
As I开发者_如何学Go have tried to get the value from the DatePicker, I realized that the picker passes back an NSTimeInterval
that gets the current time in seconds:
UIDatePicker *pickerView = [[UIDatePicker alloc] init];
NSTimeInterval new = (NSTimeInterval)pickerView.countDownDuration;
So all I want is to know the value that the user selected, not the current time in seconds.
I am trying to pass this data back from a DatePicker that is being presented in a UIActionSheet
...any thoughts about what is going on or what I am doing wrong?
I just want a timer!!!!!!!
Your code lacks a line, you have to set the mode for your UIDatePicker. The full code should be:
UIDatePicker *pickerView = [[UIDatePicker alloc] init];
pickerView.datePickerMode = UIDatePickerModeCountDownTimer;
// please DON'T use new because it is objc syntax
NSTimeInterval timeInterval = (NSTimeInterval)pickerView.countDownDuration;
and then if you don't know how to convert your NSTimeInterval (seconds) to minutes, you can use this question
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