//獲取某月的第一天字符串

-(NSString *)getMonthFirstDayWithDate:(NSDate *)date format:(NSString *)aformat{

? ? NSDate * newDate = date;

? ? double interval = 0;

? ? NSDate * firstDate = nil;

? ? NSCalendar * calendar = [NSCalendar currentCalendar];

? ? BOOL bl = [calendar rangeOfUnit:NSCalendarUnitMonth startDate:&firstDate interval:&interval forDate:newDate];

? ? if(bl) {

? ? ? ? NSDateFormatter * myDateFormatter = [[NSDateFormatter alloc]init];

? ? ? ? [myDateFormatter setDateFormat:aformat];

? ? ? ? NSString * firstString = [myDateFormatter stringFromDate: firstDate];

? ? ? ? return firstString;

? ? }

? ? return @"";

}

//獲取某月的最后一天字符串

-(NSString *)getMonthLastDayWithDate:(NSDate *)date format:(NSString *)aformat{

? ? NSDate * newDate = date;

? ? double interval = 0;

? ? NSDate * firstDate = nil;

? ? NSDate * lastDate = nil;

? ? NSCalendar * calendar = [NSCalendar currentCalendar];

? ? BOOL bl = [calendar rangeOfUnit:NSCalendarUnitMonth startDate:&firstDate interval:&interval forDate:newDate];

? ? if(bl) {

? ? ? ? lastDate = [firstDate dateByAddingTimeInterval:interval -1];

? ? ? ? NSDateFormatter * myDateFormatter = [[NSDateFormatter alloc]init];

? ? ? ? [myDateFormatter setDateFormat:aformat];

? ? ? ? NSString * lastString = [myDateFormatter stringFromDate:lastDate];

? ? ? ? return lastString;

? ? }

? ? return @"";

}

//調(diào)用某月第一天方法

[self getMonthFirstDayWithDate:[NSDate date] format:@"yyyy-MM-dd"];

//調(diào)用某月最后一天方法

[self getMonthLastDayWithDate:[NSDate date] format:@"yyyy-MM-dd"];