puis-je changer la couleur de la police de la datePicker dans iOS7?

- (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view{

UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, pickerView.frame.size.width, 44)];
label.backgroundColor = [UIColor grayColor];
label.textColor = [UIColor whiteColor];
label.font = [UIFont fontWithName:@"HelveticaNeue-Bold" size:18];
label.text = [NSString stringWithFormat:@" %d", row+1];
return label;    
}

//number Of Components
- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView{
return 1;
}

//number Of Rows In Component
- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:   (NSInteger)component{
return 6;
}

C'est la façon la plus simple et ça marche!!! Je Le Promets. Créer le UIDatePicker dans la vue, ou de le connecter via un storyboard, puis mettez le code suivant dans la méthode ViewDidLoad. Remplacer "datepicker" dans la première ligne avec ce que vous avez nommé votre sélecteur de date.

Objective-C:

//Set Color of Date Picker
self.datePicker.datePickerMode = UIDatePickerModeDate;
[self.datePicker setValue:[UIColor colorWithRed:70/255.0f green:161/255.0f blue:174/255.0f alpha:1.0f] forKeyPath:@"textColor"];
SEL selector = NSSelectorFromString(@"setHighlightsToday:");
NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:[UIDatePicker instanceMethodSignatureForSelector:selector]];
BOOL no = NO;
[invocation setSelector:selector];
[invocation setArgument:&no atIndex:2];
[invocation invokeWithTarget:self.datePicker];

Je suis allé de l'avant et mis en œuvre un UIDatePicker de remplacement à l'aide de UIControl et UIPicker pour iOS 7. Qui vous permet de modifier tout ce que vous voulez, y compris le texte, les polices et les couleurs.
La seule chose que je ne pouvais pas changer la couleur des lignes autour de la ligne sélectionnée.

Il y a des choses qui pourraient être encore simplifiée et il affiche uniquement la date, le pas de temps. Ceci pourrait servir de point de départ pour tous ceux qui veulent faire quelque chose de similaire.

@interface SBDatePicker : UIControl

@property (nonatomic, strong, readwrite) NSDate *minimumDate;
@property (nonatomic, strong, readwrite) NSDate *maximumDate;
@property (nonatomic, strong, readwrite) NSDate *date;

- (void)setDate:(NSDate *)date animated:(BOOL)animated;

@end

#import "SBDatePicker.h"
const NSUInteger NUM_COMPONENTS = 3;
typedef enum {
kSBDatePickerInvalid = 0,
kSBDatePickerYear,
kSBDatePickerMonth,
kSBDatePickerDay
} SBDatePickerComponent;
@interface SBDatePicker () <UIPickerViewDataSource, UIPickerViewDelegate> {
SBDatePickerComponent _components[NUM_COMPONENTS];
}
@property (nonatomic, strong, readwrite) NSCalendar *calendar;
@property (nonatomic, weak, readwrite) UIPickerView *picker;
@property (nonatomic, strong, readwrite) NSDateFormatter *dateFormatter;
@property (nonatomic, strong, readwrite) NSDateComponents *currentDateComponents;
@property (nonatomic, strong, readwrite) UIFont *font;
@end
@implementation SBDatePicker
#pragma mark - Life cycle
- (id)initWithFrame:(CGRect)frame {
self = [super initWithFrame:frame];
if (!self) {
return nil;
}
[self commonInit];
return self;
}
- (id)initWithCoder:(NSCoder *)coder {
self = [super initWithCoder:coder];
if (!self) {
return nil;
}
[self commonInit];
return self;
}
- (void)commonInit {
self.tintColor = [UIColor whiteColor];
self.font = [UIFont systemFontOfSize:23.0f];
self.calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
[self setLocale:[NSLocale currentLocale]];
UIPickerView *picker = [[UIPickerView alloc] initWithFrame:self.bounds];
picker.autoresizingMask = (UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight);
picker.dataSource = self;
picker.delegate = self;
picker.tintColor = [UIColor whiteColor];
self.date = [NSDate date];
[self addSubview:picker];
self.picker = picker;
}
- (CGSize)intrinsicContentSize {
return CGSizeMake(320.0f, 216.0f);
}
#pragma mark - Setup
- (void)setMinimumDate:(NSDate *)minimumDate {
_minimumDate = minimumDate;
[self updateComponents];
}
- (void)setMaximumDate:(NSDate *)maximumDate {
_maximumDate = maximumDate;
[self updateComponents];
}
- (void)setDate:(NSDate *)date {
[self setDate:date animated:NO];
}
- (void)setDate:(NSDate *)date animated:(BOOL)animated {
self.currentDateComponents = [self.calendar components:(NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit)
fromDate:date];
[self.picker reloadAllComponents];
[self setIndicesAnimated:YES];
}
- (NSDate *)date {
return [self.calendar dateFromComponents:self.currentDateComponents];
}
- (void)setLocale:(NSLocale *)locale {
self.calendar.locale = locale;
[self updateComponents];
}
- (SBDatePickerComponent)componentFromLetter:(NSString *)letter {
if ([letter isEqualToString:@"y"]) {
return kSBDatePickerYear;
}
else if ([letter isEqualToString:@"m"]) {
return kSBDatePickerMonth;
}
else if ([letter isEqualToString:@"d"]) {
return kSBDatePickerDay;
}
else {
return kSBDatePickerInvalid;
}
}
- (SBDatePickerComponent)thirdComponentFromFirstComponent:(SBDatePickerComponent)component1
andSecondComponent:(SBDatePickerComponent)component2 {
NSMutableIndexSet *set = [NSMutableIndexSet indexSetWithIndexesInRange:NSMakeRange(kSBDatePickerInvalid + 1, NUM_COMPONENTS)];
[set removeIndex:component1];
[set removeIndex:component2];
return (SBDatePickerComponent) [set firstIndex];
}
- (void)updateComponents {
NSString *componentsOrdering = [NSDateFormatter dateFormatFromTemplate:@"yMMMMd" options:0 locale:self.calendar.locale];
componentsOrdering = [componentsOrdering lowercaseString];
NSString *firstLetter = [componentsOrdering substringToIndex:1];
NSString *lastLetter = [componentsOrdering substringFromIndex:(componentsOrdering.length - 1)];
_components[0] = [self componentFromLetter:firstLetter];
_components[2] = [self componentFromLetter:lastLetter];
_components[1] = [self thirdComponentFromFirstComponent:_components[0] andSecondComponent:_components[2]];
self.dateFormatter = [[NSDateFormatter alloc] init];
self.dateFormatter.calendar = self.calendar;
self.dateFormatter.locale = self.calendar.locale;
[self.picker reloadAllComponents];
[self setIndicesAnimated:NO];
}
- (void)setIndexForComponentIndex:(NSUInteger)componentIndex animated:(BOOL)animated {
SBDatePickerComponent component = [self componentForIndex:componentIndex];
NSRange unitRange = [self rangeForComponent:component];
NSInteger value;
if (component == kSBDatePickerYear) {
value = self.currentDateComponents.year;
}
else if (component == kSBDatePickerMonth) {
value = self.currentDateComponents.month;
}
else if (component == kSBDatePickerDay) {
value = self.currentDateComponents.day;
}
else {
assert(NO);
}
NSInteger index = (value - unitRange.location);
NSInteger middleIndex = (INT16_MAX /2) - (INT16_MAX /2) % unitRange.length + index;
[self.picker selectRow:middleIndex inComponent:componentIndex animated:animated];
}
- (void)setIndicesAnimated:(BOOL)animated {
for (NSUInteger componentIndex = 0; componentIndex < NUM_COMPONENTS; componentIndex++) {
[self setIndexForComponentIndex:componentIndex animated:animated];
}
}
- (SBDatePickerComponent)componentForIndex:(NSInteger)componentIndex {
return _components[componentIndex];
}
- (NSCalendarUnit)unitForComponent:(SBDatePickerComponent)component {
if (component == kSBDatePickerYear) {
return NSYearCalendarUnit;
}
else if (component == kSBDatePickerMonth) {
return NSMonthCalendarUnit;
}
else if (component == kSBDatePickerDay) {
return NSDayCalendarUnit;
}
else {
assert(NO);
}
}
- (NSRange)rangeForComponent:(SBDatePickerComponent)component {
NSCalendarUnit unit = [self unitForComponent:component];
return [self.calendar maximumRangeOfUnit:unit];
}
#pragma mark - Data source
- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView {
return 3;
}
- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)componentIndex {
return INT16_MAX;
}
#pragma mark - Delegate
- (CGFloat)pickerView:(UIPickerView *)pickerView widthForComponent:(NSInteger)componentIndex {
SBDatePickerComponent component = [self componentForIndex:componentIndex];
if (component == kSBDatePickerYear) {
CGSize size = [@"0000" sizeWithAttributes:@{NSFontAttributeName : self.font}];
return size.width + 25.0f;
}
else if (component == kSBDatePickerMonth) {
CGFloat maxWidth = 0.0f;
for (NSString *monthName in self.dateFormatter.monthSymbols) {
CGFloat monthWidth = [monthName sizeWithAttributes:@{NSFontAttributeName : self.font}].width;
maxWidth = MAX(monthWidth, maxWidth);
}
return maxWidth + 25.0f;
}
else if (component == kSBDatePickerDay) {
CGSize size = [@"00" sizeWithAttributes:@{NSFontAttributeName : self.font}];
return size.width + 25.0f;
}
else {
return 0.01f;
}
}
- (NSString *)titleForRow:(NSInteger)row forComponent:(SBDatePickerComponent)component {
NSRange unitRange = [self rangeForComponent:component];
NSInteger value = unitRange.location + (row % unitRange.length);
if (component == kSBDatePickerYear) {
return [NSString stringWithFormat:@"%li", (long) value];
}
else if (component == kSBDatePickerMonth) {
return [self.dateFormatter.monthSymbols objectAtIndex:(value - 1)];
}
else if (component == kSBDatePickerDay) {
return [NSString stringWithFormat:@"%li", (long) value];
}
else {
return @"";
}
}
- (NSInteger)valueForRow:(NSInteger)row andComponent:(SBDatePickerComponent)component {
NSRange unitRange = [self rangeForComponent:component];
return (row % unitRange.length) + unitRange.location;
}
- (BOOL)isEnabledRow:(NSInteger)row forComponent:(NSInteger)componentIndex {
NSDateComponents *dateComponents = [[NSDateComponents alloc] init];
dateComponents.year = self.currentDateComponents.year;
dateComponents.month = self.currentDateComponents.month;
dateComponents.day = self.currentDateComponents.day;
SBDatePickerComponent component = [self componentForIndex:componentIndex];
NSInteger value = [self valueForRow:row andComponent:component];
if (component == kSBDatePickerYear) {
dateComponents.year = value;
}
else if (component == kSBDatePickerMonth) {
dateComponents.month = value;
}
else if (component == kSBDatePickerDay) {
dateComponents.day = value;
}
NSDate *rowDate = [self.calendar dateFromComponents:dateComponents];
if (self.minimumDate != nil && [self.minimumDate compare:rowDate] == NSOrderedDescending) {
return NO;
}
else if (self.maximumDate != nil && [rowDate compare:self.maximumDate] == NSOrderedDescending) {
return NO;
}
return YES;
}
- (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)componentIndex reusingView:(UIView *)view {
UILabel *label;
if ([view isKindOfClass:[UILabel class]]) {
label = (UILabel *) view;
}
else {
label = [[UILabel alloc] init];
label.font = self.font;
}
SBDatePickerComponent component = [self componentForIndex:componentIndex];
NSString *title = [self titleForRow:row forComponent:component];
UIColor *color;
BOOL enabled = [self isEnabledRow:row forComponent:componentIndex];
if (enabled) {
color = [UIColor whiteColor];
}
else {
color = [UIColor colorWithWhite:0.0f alpha:0.5f];
}
NSAttributedString *attributedTitle = [[NSAttributedString alloc] initWithString:title
attributes:@{NSForegroundColorAttributeName: color}];
label.attributedText = attributedTitle;
if (component == kSBDatePickerMonth) {
label.textAlignment = NSTextAlignmentLeft;
}
else {
label.textAlignment = NSTextAlignmentRight;
}
return label;
}
- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)componentIndex {
SBDatePickerComponent component = [self componentForIndex:componentIndex];
NSInteger value = [self valueForRow:row andComponent:component];
if (component == kSBDatePickerYear) {
self.currentDateComponents.year = value;
}
else if (component == kSBDatePickerMonth) {
self.currentDateComponents.month = value;
}
else if (component == kSBDatePickerDay) {
self.currentDateComponents.day = value;
}
else {
assert(NO);
}
[self setIndexForComponentIndex:componentIndex animated:NO];
NSDate *datePicked = self.date;
if (self.minimumDate != nil && [datePicked compare:self.minimumDate] == NSOrderedAscending) {
[self setDate:self.minimumDate animated:YES];
}
else if (self.maximumDate != nil && [datePicked compare:self.maximumDate] == NSOrderedDescending) {
[self setDate:self.maximumDate animated:YES];
}
else {
[self.picker reloadAllComponents];
}
[self sendActionsForControlEvents:UIControlEventValueChanged];
}
@end

Dans le viewDidLoad,

datePicker.setValue(UIColor.yellowColor(), forKey: "textColor")
datePicker.performSelector("setHighlightsToday:", withObject:UIColor.yellowColor())

De travail pour iOS 9

J'ai répondu à une question similaire ici: UIPickerView des Polices Personnalisées iOS7 Fondamentalement, vous avez à pirater le viewForRow: méthode et pour l'instant j'ai seulement eu à travailler pour UIPickerView n'est pas UIDatePickers. (travail sur elle...)

-(UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view

Et voici comment vous pour un UIPickerView pour afficher attribué texte (polices personnalisées, couleurs etc...)

-(UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view
{
//create attributed string
NSString *yourString;  //can also use array[row] to get string
NSDictionary *attributeDict = @{NSForegroundColorAttributeName : [UIColor whiteColor]};
NSAttributedString *attributedString = [[NSAttributedString alloc] initWithString:yourString attributes:attributeDict];
//add the string to a label's attributedText property
UILabel *labelView = [[UILabel alloc] init];
labelView.attributedText = attributedString;
//return the label
return labelView;

}

Espère que ça aide... je vais modifier ma réponse dès que je figure sur le Sélecteur de Date!

Cela fonctionne sous iOS 9

[datePicker setValue:[UIColor whiteColor] forKey:@"textColor"];