dateFromComponents返回錯誤值

Question

我試圖[NSDate的日期]，但功能dateFromComponents返回錯誤值的月和年設置，這是我的代碼：

NSCalendar *gregorianCalendar = [[NSCalendar alloc] initWithCalendarIdentifier: NSCalendarIdentifierGregorian]; // Setup an NSCalendar 
NSDateComponents *components = [gregorianCalendar components: NSUIntegerMax fromDate: [NSDate date]]; // Setup NSDateComponents 
[components setTimeZone:[NSTimeZone defaultTimeZone]]; 
[components setMonth:monthInt]; 
[components setYear:yearInt]; 

// Setup the new date 
NSDate *dateToCompare = [gregorianCalendar dateFromComponents: components]; 

yearInt是2014年和monthInt是12 ，但它報告12-2015而不是2014年，這是爲什麼？

謝謝！

Answer 1

只需把你所需要的位操作，試試這個：

NSCalendar *gregorianCalendar = [[NSCalendar alloc] initWithCalendarIdentifier: NSCalendarIdentifierGregorian]; // Setup an NSCalendar 
NSDateComponents *components = [gregorianCalendar components: NSCalendarUnitDay | NSCalendarUnitMonth | NSCalendarUnitYear |NSCalendarUnitSecond | NSCalendarUnitMinute | NSCalendarUnitHour | NSCalendarUnitTimeZone fromDate: [NSDate date]]; // Setup NSDateComponents 
[components setTimeZone:[NSTimeZone defaultTimeZone]]; 
[components setMonth:12]; 
[components setYear:2014]; 

// Setup the new date 
NSDate *dateToCompare = [gregorianCalendar dateFromComponents: components]; 

NSLog(@"Ver %@",dateToCompare); 

NSUIntegerMax = 18446744073709551615 在比特表示：10000000000000000000000000000000000000000000000000000000000000000 要多關閉。