如何獲得一個月的週數

這裏是問題，我正在尋找一種方法來獲得一個月的週數。我已經找到了一個似乎適用於ios 5的解決方案，但它不在io6上（返回的數字不一樣，在ios 6上又多一個）。如何獲得一個月的週數

- (int)weeksOfMonth:(int)month inYear:(int)year 
{ 
    NSCalendar *cCalendar = [NSCalendar currentCalendar]; 

    NSDateComponents *components = [[NSDateComponents alloc] init]; 
    [components setMonth:month]; 
    [components setYear:year]; 

    NSRange range = [cCalendar rangeOfUnit:NSDayCalendarUnit 
           inUnit:NSMonthCalendarUnit 
           forDate:[cCalendar dateFromComponents:components]]; 

    cCalendar = [NSCalendar currentCalendar]; 
    [cCalendar setMinimumDaysInFirstWeek:4]; 

    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc]init]; 
    [dateFormatter setLocale: [[NSLocale alloc] initWithLocaleIdentifier:@"fr"]]; 
    [dateFormatter setDateFormat:@"yyyy-MM-dd"]; 
    NSMutableSet *weeks = [[NSMutableSet alloc] init ]; 

    for(int i = 0; i < range.length; i++) 
    { 
     NSString *temp = [NSString stringWithFormat:@"%4d-%2d- %2d",year,month,range.location+i]; 
     NSDate *date = [dateFormatter dateFromString:temp ]; 
     int week = [[cCalendar components: NSWeekOfYearCalendarUnit fromDate:date] weekOfYear]; 
     [weeks addObject:[NSNumber numberWithInt:week]]; 
    } 

    return [weeks count]; 
}

io6返回值爲6，io5返回值爲5。

你有什麼想法嗎？

編輯：另一件事，我的設備（ios5）是在法語和模擬器（ios6）是英文。也許它可以改變一些東西（比如每週的第一天？）？

來源

2013-03-06 R.Lambert

即使在osx中它說6.這是正確的計數。 – 2013-03-06 09:35:40

你正在試圖顯示問題的月份和年份是多少？ – occulus 2013-03-06 09:41:14

檢查我的updatd代碼，我檢查它在osx和ios6中，它工作正常。 – 2013-03-06 10:40:35

試試這個：

NSDate *date = [NSDate date];//since you are forming date, put it here 
NSCalendar *calender = [NSCalendar currentCalendar]; 
NSRange weekRange = [calender rangeOfUnit:NSWeekCalendarUnit inUnit:NSMonthCalendarUnit forDate:date]; 
NSInteger weeksCount=weekRange.length; 
NSLog(@"%d",weeksCount);

雨燕4.0：

let date = Date() 
let calendar = Calendar.current 
let weekRange = calendar.range(of: .weekOfMonth, 
           in: .month, 
           for: date) 
let weeksCount = weekRange.count ?? 0 
print(weeksCount)

或更改方法：

- (NSInteger)weeksOfMonth:(int)month inYear:(int)year{ 
    NSString *dateString=[NSString stringWithFormat:@"%4d/%d/1",year,month]; 

    NSDateFormatter *dfMMddyyyy=[NSDateFormatter new]; 
    [dfMMddyyyy setDateFormat:@"yyyy/MM/dd"]; 
    NSDate *date=[dfMMddyyyy dateFromString:dateString]; 

    NSCalendar *calender = [NSCalendar currentCalendar]; 
    NSRange weekRange = [calender rangeOfUnit:NSWeekCalendarUnit inUnit:NSMonthCalendarUnit forDate:date]; 
    NSInteger weeksCount=weekRange.length; 

    return weeksCount; 
}

編輯：在上述方法中

//NSCalendar *calender = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar]; 
[calender setFirstWeekday:2]; //sunday=1, monday=2 etc

來源

2013-03-06 09:40:35

謝謝你的代碼，但結果不會改變，我仍然有5在我的設備上（ios5）和6在模擬器上（ios6）。我忘了一件事，也許這是一個本地化問題，也許在法國（像我的設備一樣）星期一開始星期一（我想要的），但不是英文？ – 2013-03-06 18:04:35

你走了，這是問題所在，不過你上面有一個較短的解決方案。 – 2013-03-06 18:06:23

檢查我編輯的答案; – 2013-03-06 18:09:57

檢查這種方法

使用本。

-(NSArray*)getWeekDaysForDate { 


int dayOfWeek = [self weekDay]; 

NSMutableArray *array = [NSMutableArray array]; 

NSDate *weekStartDate = [self offsetDay:1-dayOfWeek]; 

NSCalendar *calendar = [NSCalendar defaultCalendar]; 
NSInteger monthValue = [self month]; 
unsigned int weekNum = [[calendar components: NSWeekCalendarUnit 
           fromDate: weekStartDate] week]; 
NSDate * nextDate = weekStartDate, *curDate; 
NSDateComponents *oneDay = [[NSDateComponents alloc] init]; 
[oneDay setDay:1]; 
unsigned int newWeekNum; 
do { 
    curDate = nextDate; 
    nextDate = [calendar dateByAddingComponents:oneDay toDate: curDate 
            options:0]; 

    newWeekNum = [[calendar components: NSWeekCalendarUnit fromDate: 
        nextDate] week]; 
    int monthValueForNextDate = [[calendar components: NSMonthCalendarUnit fromDate: 
         nextDate] month]; 

    if(monthValue == monthValueForNextDate) 
     [array addObject:nextDate]]; 

} while (newWeekNum == weekNum); 

[array sortUsingSelector:@selector(compare:)]; 

return array; 
} 

-(int)month { 
    NSCalendar *gregorian = [NSCalendar defaultCalendar]; 
    NSDateComponents *components = [gregorian components:NSMonthCalendarUnit fromDate:self]; 
    return [components month]; 
} 

-(int)weekDay { 
    NSCalendar *gregorian = [NSCalendar defaultCalendar]; 
    NSDateComponents *components = [gregorian components:NSWeekdayCalendarUnit fromDate:self]; 
    return [components weekday]; 
} 

-(NSDate *)offsetDay:(int)numDays { 
    NSCalendar *gregorian = [NSCalendar defaultCalendar]; 
    NSDateComponents *offsetComponents = [[NSDateComponents alloc] init]; 
    [offsetComponents setDay:numDays]; 
    return [gregorian dateByAddingComponents:offsetComponents 
            toDate:self options:0]; 
}

PS：NSCalendar defaultCalendar = [[NSCalendar alloc]initWithCalendarIdentifier:NSGregorianCalendar];

添加此方法則NSDate類將返回位於同一周的任何日期的工作日。

最好的問候。

來源

2013-03-06 10:20:03 Arun

如何獲得一個月的週數

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