为什么80%的码农都做不了架构师?>>>
double diffTime = [nowDate timeIntervalSinceDate:preDate];
int diffHour = diffTime / (60*60);
int diffMin = ( diffTime - diffHour*(60*60) ) / (60);
int diffSeconds = diffTime - (diffHour * 60 * 60) - diffMin * 60;
NSLog(@"%d:%d:%d",diffHour,diffMin,diffSeconds);