前言

在开发IOS中常常需要用到这一功能，在限定一个月的时间间隔为第一天和最后一天，需要知道这个月有多少天，才能知道最后一天是多少号，而且还要知道是否是闰年，可能2月只有28天。

话不多说，附上代码：

- (void)viewDidLoad {  [super viewDidLoad];  // Do any additional setup after loading the view, typically from a nib.  NSLog(@"%ld",(long)[self howManyDaysInThisYear:2016 withMonth:1]);  NSLog(@"%ld",(long)[self howManyDaysInThisYear:2016 withMonth:2]);  NSLog(@"%ld",(long)[self howManyDaysInThisYear:2016 withMonth:3]);  NSLog(@"%ld",(long)[self howManyDaysInThisYear:2016 withMonth:4]);  NSLog(@"%ld",(long)[self howManyDaysInThisYear:2016 withMonth:5]);  NSLog(@"%ld",(long)[self howManyDaysInThisYear:2016 withMonth:6]);  NSLog(@"%ld",(long)[self howManyDaysInThisYear:2016 withMonth:7]);  NSLog(@"%ld",(long)[self howManyDaysInThisYear:2016 withMonth:8]);}#pragma mark - 获取某年某月的天数- (NSInteger)howManyDaysInThisYear:(NSInteger)year withMonth:(NSInteger)month{  if((month == 1) || (month == 3) || (month == 5) || (month == 7) || (month == 8) || (month == 10) || (month == 12))    return 31 ;   if((month == 4) || (month == 6) || (month == 9) || (month == 11))    return 30;   if((year % 4 == 1) || (year % 4 == 2) || (year % 4 == 3))  {    return 28;  }   if(year % 400 == 0)    return 29;   if(year % 100 == 0)    return 28;   return 29;}

总结

以上就是IOS获取指定年月的当月天数的全部内容，希望本文的内容对大家开发IOS能有所帮助。