ios7에서 요일을 차단하여 UIPIckerView를 작성하는 방법

Question

내 픽커에서 모든 월요일을 삭제하여 선택기보기를 만들고 싶습니다. 아무도 도와 줄 수 있습니까?

방법 iOS7에 강력한 텍스트 당신은 UIDatePicker이 작업을 수행 할 수

Answer 1

에 일주일에 몇 가지 일을 차단하여 uipickerview 구축, 당신은 UIPickerView하고 자신의 논리의 사용을 확인해야합니다. 아래는이를 달성하기위한 코드입니다. 그러나 그것이 효율적인지 확실하지 않습니다.

#import "ViewController.h" 

@interface ViewController() { 
    IBOutlet UIPickerView *_pickerView; 
    NSDate *_startDate; 
    NSDate *_endDate; 
    NSMutableDictionary *_dates; 
} 

@end 

@implementation ViewController 

- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 

    NSCalendar *calendar = [NSCalendar currentCalendar];//[[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar]; 
    NSDateComponents *comp = [calendar components:(NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit) fromDate:[NSDate date]]; 
    [comp setHour:00]; 
    [comp setMinute:00]; 
    [comp setSecond:00]; 
    [comp setMonth:1]; 
    [comp setDay:1]; 
    //From this year 
    _startDate = [calendar dateFromComponents:comp]; 
    [comp setYear:++comp.year]; 
    //Till next year 
    _endDate = [calendar dateFromComponents:comp]; 
    _dates = [[NSMutableDictionary alloc] initWithObjectsAndKeys:_startDate,@(0), nil]; 
} 

- (void)didReceiveMemoryWarning 
{ 
    [super didReceiveMemoryWarning]; 
} 

#pragma mark - UIPickerViewDataSource 
- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView 
{ 
    return 1; 
} 

- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component 
{ 
    NSCalendar *calendar = [NSCalendar currentCalendar]; 
    NSDateComponents *difference = [calendar components:NSDayCalendarUnit 
               fromDate:_startDate toDate:_endDate options:0]; 
    return [difference day]; 
} 

- (NSDate *)nextDate:(NSDate *)date 
{ 
    NSCalendar *calendar = [NSCalendar currentCalendar]; 
    NSDateComponents *comp = [calendar components:(NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit) fromDate:date]; 
    [comp setDay:++comp.day]; 
    return [calendar dateFromComponents:comp]; 
} 

#pragma mark - UIPickerViewDelegate 

- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component 
{ 
    NSDate *currentDate = [_dates objectForKey:@(row)]; 

    if (![_dates objectForKey:@(row+1)]) { 
     NSDate *nextDate = [self nextDate:currentDate]; 
     NSCalendar *calendar = [NSCalendar currentCalendar]; 
     NSDateComponents *weekdayComponents =[calendar components:NSWeekdayCalendarUnit fromDate:nextDate]; 
     NSInteger weekday = [weekdayComponents weekday]; 
     if (weekday == 2) { 
      NSDate *nextDateAfterMonday = [self nextDate:nextDate]; 
      [_dates setObject:nextDateAfterMonday forKey:@(row+1)]; 
     } 
     else{ 
      [_dates setObject:nextDate forKey:@(row+1)]; 
     } 
    } 
    NSDateFormatter *formatter = [[NSDateFormatter alloc] init]; 
    [formatter setDateFormat:@"EEE, MMM d, ''yy"]; 
    [formatter stringFromDate:currentDate]; 
    return [formatter stringFromDate:currentDate]; 
} 
@end