iOS7でdatePickerのフォントの色を変更できますか？
xcode 5のコピーをダウンロードしたばかりで、日付選択ツールでフォントの色やサイズを変更する方法を誰かが知っているのではないかと思っていましたか？
私は自分のアプリにも同様のものが必要で、長い道のりを歩んでしまいました。 UIDatePickerの白いテキストバージョンに簡単に切り替える簡単な方法がないのは本当に残念です。
以下のコードでは、UILabelのカテゴリを使用して、setTextColor：メッセージがラベルに送信されるときに、ラベルのテキストの色を強制的に白にします。アプリのすべてのラベルに対してこれを行わないために、UIDatePickerクラスのサブビューである場合にのみ適用するようにフィルターを適用しました。最後に、一部のラベルは、スーパービューに追加される前に色が設定されています。これらをキャッチするために、コードはwillMoveToSuperview：メソッドをオーバーライドします。
以下を複数のカテゴリに分割した方が良いと思われますが、投稿を簡単にするためにここにすべて追加しました。
#import "UILabel+WhiteUIDatePickerLabels.h"
#import <objc/runtime.h>
@implementation UILabel (WhiteUIDatePickerLabels)
+ (void)load {
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
[self swizzleInstanceSelector:@selector(setTextColor:)
withNewSelector:@selector(swizzledSetTextColor:)];
[self swizzleInstanceSelector:@selector(willMoveToSuperview:)
withNewSelector:@selector(swizzledWillMoveToSuperview:)];
});
}
// Forces the text colour of the label to be white only for UIDatePicker and its components
-(void) swizzledSetTextColor:(UIColor *)textColor {
if([self view:self hasSuperviewOfClass:[UIDatePicker class]] ||
[self view:self hasSuperviewOfClass:NSClassFromString(@"UIDatePickerWeekMonthDayView")] ||
[self view:self hasSuperviewOfClass:NSClassFromString(@"UIDatePickerContentView")]){
[self swizzledSetTextColor:[UIColor whiteColor]];
} else {
//Carry on with the default
[self swizzledSetTextColor:textColor];
}
}
// Some of the UILabels haven't been added to a superview yet so listen for when they do.
- (void) swizzledWillMoveToSuperview:(UIView *)newSuperview {
[self swizzledSetTextColor:self.textColor];
[self swizzledWillMoveToSuperview:newSuperview];
}
// -- helpers --
- (BOOL) view:(UIView *) view hasSuperviewOfClass:(Class) class {
if(view.superview){
if ([view.superview isKindOfClass:class]){
return true;
}
return [self view:view.superview hasSuperviewOfClass:class];
}
return false;
}
+ (void) swizzleInstanceSelector:(SEL)originalSelector
withNewSelector:(SEL)newSelector
{
Method originalMethod = class_getInstanceMethod(self, originalSelector);
Method newMethod = class_getInstanceMethod(self, newSelector);
BOOL methodAdded = class_addMethod([self class],
originalSelector,
method_getImplementation(newMethod),
method_getTypeEncoding(newMethod));
if (methodAdded) {
class_replaceMethod([self class],
newSelector,
method_getImplementation(originalMethod),
method_getTypeEncoding(originalMethod));
} else {
method_exchangeImplementations(originalMethod, newMethod);
}
}
@end
これが最も簡単な方法であり、機能します！約束します。ビューでUIDatePickerを作成するか、ストーリーボードを介して接続し、次のコードをViewDidLoadメソッドに追加します。最初の行の「datepicker」を、日付ピッカーの名前に置き換えます。
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];
「日付ピッカーの外観をカスタマイズすることはできません」。
IOS 7の設計リソース/ UIKitユーザーインターフェイスカタログ/日付ピッカーをご覧ください
先に進み、UIDatePickerとUIControlを使用したiOS 7のUIPicker置換を実装しました。これにより、テキストのフォントや色など、必要なものをすべて編集できます。変更できなかったのは、選択した行の周りの線の色だけです。
さらに簡略化できるものがあり、時間ではなく日付のみが表示されます。これは、似たようなことをしたい人のための出発点として役立ちます。
@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
ViewDidLoadでは、
datePicker.setValue(UIColor.yellowColor(), forKey: "textColor")
datePicker.performSelector("setHighlightsToday:", withObject:UIColor.yellowColor())
IOS 9での作業
私もこれに苦労しています、黒い背景に黒いテキスト。 :)テキストの色を変更する方法をまだ見つけていません。ただし、背景色で遊ぶことができます：
picker.backgroundColor = [UIColor whiteColor];
私が働いたことがわかった別のハックは、日付ピッカーのすべてのUIViewを与えることです（すべての番号に独自のUIViewがあります（私は知っています）
[UIView appearanceWhenContainedIn:[UITableView class], [UIDatePicker class], nil].backgroundColor = [UIColor colorWithWhite:1 alpha:0.5]
（このオプションを使用すると、回転中に迷惑なちらつき効果が発生するため、お勧めしません。）
お役に立てれば。 :)
少しハッキーですが、それでもまた、他のすべてのソリューションもそうです。これは私のために働きました：UIDatePickerをサブクラス化し、ビューを追加する前にtextColor属性の値を変更します。
色だけを変更するには：
class ColoredDatePicker: UIDatePicker {
var changed = false
override func addSubview(view: UIView) {
if !changed {
changed = true
self.setValue(yourColor, forKey: "textColor")
}
super.addSubview(view)
}
}
色およびその他の属性を変更するには：
これを見つけたら更新します。
色は、色オブジェクトが指示するとおりに正確に表現されていないことに気づきますが、それで遊んで、それをあなたが望む色にします。
私はここで同様の質問に答えました： IPickerView Custom Fonts iOS7 基本的に、viewForRow：メソッドをハックする必要があり、今のところUIDatePickersではなくUIPickerViewでのみ機能しています。 （それに取り組んで...）
-(UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view
UIPickerViewで属性付きテキスト（カスタムフォント、色など）を表示する方法は次のとおりです。
-(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;
}
これがお役に立てば幸いです...日付ピッカーがわかり次第、回答を編集します！
Swift=これらの2行をviewDidLoadに追加できます。
datePicker.setValue(DesignHelper.getOffWhiteColor(), forKey: "textColor")
datePicker.performSelector("setHighlightsToday:", withObject: UIColor.whiteColor())
これはiOS 9で動作します
[datePicker setValue:[UIColor whiteColor] forKey:@"textColor"];
私はUIAppearanceを使用して驚くほどきれいなソリューションを見つけました。 textColor内のUIAppearanceに対してUILabelを介してUIPickerViewを設定しようとしても効果はありませんが、単に通常のtextColor setterは問題なく機能しました。
// Implement a custom appearance property via a UILabel category
@interface UILabel (PickerLabelTextColor)
@property (nonatomic, strong) UIColor * textColorWorkaround UI_APPEARANCE_SELECTOR;
@end
@implementation UILabel (PickerLabelTextColor)
- (UIColor *)textColorWorkaround {
return self.textColor;
}
- (void)setTextColorWorkaround:(UIColor *)textColor {
self.textColor = textColor;
}
@end
そして、次のように使用します。
UILabel *pickerLabelProxy = [UILabel appearanceWhenContainedInInstancesOfClasses:@[UIPickerView.class]];
pickerLabelProxy.textColorWorkaround = UIColor.lightGrayColor;