Question

I am developing Alarm Clock.
I want to compare a time now and setTime. Is it possible to compare in minutes only.

My Problem is NSDate will compare in seconds, for example 9:38:50 is not equal to 9:38:00.
how can I compare in minutes?

Answer 1

First, convert them to UNIX timestamp ignoring milliseconds.

NSUInteger time1 = (NSUInteger)[date1 timeIntervalSince1970];
NSUInteger time2 = (NSUInteger)[date2 timeIntervalSince1970];

Ignore seconds.

time1 = time1 - (time1 % 60);
time2 = time2 - (time2 % 60);

Now, you can safely compare them.

if (time1 == time2) {
  NSLog(@"Bingo");
}