#import "QLDatePicker.h"
@interface QLDatePicker (){
NSInteger nDays;
}
@property (nonatomic, strong) UIPickerView *picker;
@property (nonatomic, strong) NSCalendar *calendar;
@property (nonatomic, strong) NSDate *minDate;
@property (nonatomic, strong) NSDate *maxDate;
@property (readonly, strong) NSDate *earliestPresentedDate;
@property (nonatomic) BOOL showOnlyValidDates;
@end
@implementation QLDatePicker
- (id)initWithFrame:(CGRect)frame {
self = [super initWithFrame:frame];
if (!self) {
return nil;
}
self.minDate = [NSDate dateWithTimeIntervalSince1970:0];
[self commonInit];
return self;
}
- (id)initWithFrame:(CGRect)frame maxDate:(NSDate *)maxDate minDate:(NSDate *)minDate showValidDatesOnly:(BOOL)showValidDatesOnly
{
self = [super initWithFrame:frame];
if (!self) {
return nil;
}
assert((((minDate) && (maxDate)) && ([minDate compare:maxDate] != NSOrderedDescending)));
self.minDate = minDate;
self.maxDate = maxDate;
self.showOnlyValidDates = showValidDatesOnly;
[self commonInit];
return self;
}
- (id)initWithCoder:(NSCoder *)coder {
self = [super initWithCoder:coder];
if (!self) {
return nil;
}
[self commonInit];
return self;
}
-(NSDate *)earliestPresentedDate
{
return self.showOnlyValidDates ? self.minDate : [NSDate dateWithTimeIntervalSince1970:0];
}
- (void)commonInit {
[self setBackgroundColor:[UIColor blackColor]];
if ([[UIDevice currentDevice].systemVersion floatValue] >= 8.0)
{
self.calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSCalendarIdentifierGregorian];
}
else
{
self.calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
}
self.picker = [[UIPickerView alloc] initWithFrame:self.bounds];
self.picker.dataSource = self;
self.picker.delegate = self;
[self initDate];
[self showDateOnPicker:self.date];
[self addSubview:self.picker];
}
-(void)showDateOnPicker:(NSDate *)date
{
self.date = date;
NSDateComponents *components = [self.calendar
components:NSYearCalendarUnit|NSMonthCalendarUnit|NSDayCalendarUnit
fromDate:self.earliestPresentedDate];
NSDate *fromDate = [self.calendar dateFromComponents:components];
components = [self.calendar components:(NSDayCalendarUnit | NSHourCalendarUnit | NSMinuteCalendarUnit)
fromDate:fromDate
toDate:date
options:0];
NSInteger hour = [components hour] + 24 * (INT16_MAX / 120);
NSInteger minute = [components minute] + 60 * (INT16_MAX / 120);
NSInteger day = [components day];
[self.picker selectRow:day inComponent:0 animated:YES];
[self.picker selectRow:hour inComponent:1 animated:YES];
[self.picker selectRow:minute inComponent:2 animated:YES];
}
-(void)initDate
{
NSInteger startDayIndex = 0;
NSInteger startHourIndex = 0;
NSInteger startMinuteIndex = 0;
if ((self.minDate) && (self.maxDate) && self.showOnlyValidDates) {
NSDateComponents *components = [self.calendar components:NSDayCalendarUnit
fromDate:self.minDate
toDate:self.maxDate
options:0];
nDays = components.day + 1;
} else {
nDays = INT16_MAX;
}
NSDate *dateToPresent;
if ([self.minDate compare:[NSDate date]] == NSOrderedDescending) {
dateToPresent = self.minDate;
} else if ([self.maxDate compare:[NSDate date]] == NSOrderedAscending) {
dateToPresent = self.maxDate;
} else {
dateToPresent = [NSDate date];
}
NSDateComponents *todaysComponents = [self.calendar components:NSDayCalendarUnit | NSHourCalendarUnit | NSMinuteCalendarUnit
fromDate:self.earliestPresentedDate
toDate:dateToPresent
options:0];
startDayIndex = todaysComponents.day;
startHourIndex = todaysComponents.hour;
startMinuteIndex = todaysComponents.minute;
self.date = [NSDate dateWithTimeInterval:startDayIndex*24*60*60+startHourIndex*60*60+startMinuteIndex*60 sinceDate:self.earliestPresentedDate];
}
- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView
{
return 3;
}
- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component
{
if (component == 0)
{
return nDays;
}
else if (component == 1)
{
return INT16_MAX;
}
else
{
return INT16_MAX;
}
}
-(CGFloat)pickerView:(UIPickerView *)pickerView widthForComponent:(NSInteger)component
{
switch (component) {
case 0:
return 170;
break;
case 1:
return 60;
break;
case 2:
return 60;
break;
default:
return 0;
break;
}
}
-(CGFloat)pickerView:(UIPickerView *)pickerView rowHeightForComponent:(NSInteger)component
{
return 35;
}
-(UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view
{
UILabel *lblDate = [[UILabel alloc] init];
[lblDate setFont:[UIFont systemFontOfSize:25.0]];
[lblDate setTextColor:[UIColor whiteColor]];
[lblDate setBackgroundColor:[UIColor clearColor]];
if (component == 0) // Date
{
NSDate *aDate = [NSDate dateWithTimeInterval:row*24*60*60 sinceDate:self.earliestPresentedDate];
NSDateComponents *components = [self.calendar components:(NSEraCalendarUnit|NSYearCalendarUnit|NSMonthCalendarUnit|NSDayCalendarUnit) fromDate:[NSDate date]];
NSDate *today = [self.calendar dateFromComponents:components];
components = [self.calendar components:(NSEraCalendarUnit|NSYearCalendarUnit|NSMonthCalendarUnit|NSDayCalendarUnit) fromDate:aDate];
NSDate *otherDate = [self.calendar dateFromComponents:components];
if ([today isEqualToDate:otherDate]) {
[lblDate setText:@"今天"];
} else {
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
formatter.locale = [NSLocale currentLocale];
formatter.dateFormat = @"MMMd日 E";
[lblDate setText:[formatter stringFromDate:aDate]];
}
lblDate.textAlignment = NSTextAlignmentRight;
}
else if (component == 1) // Hour
{
int max = (int)[self.calendar maximumRangeOfUnit:NSHourCalendarUnit].length;
[lblDate setText:[NSString stringWithFormat:@"%02ld",(row % max)]]; // 02d = pad with leading zeros to 2 digits
lblDate.textAlignment = NSTextAlignmentCenter;
}
else if (component == 2) // Minutes
{
int max = (int)[self.calendar maximumRangeOfUnit:NSMinuteCalendarUnit].length;
[lblDate setText:[NSString stringWithFormat:@"%02ld",(row % max)]];
lblDate.textAlignment = NSTextAlignmentLeft;
}
return lblDate;
}
-(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
{
NSInteger daysFromStart;
NSDate *chosenDate;
daysFromStart = [pickerView selectedRowInComponent:0];
chosenDate = [NSDate dateWithTimeInterval:daysFromStart*24*60*60 sinceDate:self.earliestPresentedDate];
NSInteger hour = [pickerView selectedRowInComponent:1];
NSInteger minute = [pickerView selectedRowInComponent:2];
// Build date out of the components we got
NSDateComponents *components = [self.calendar components:(NSDayCalendarUnit | NSMonthCalendarUnit | NSYearCalendarUnit) fromDate:chosenDate];
components.hour = hour % 24;
components.minute = minute % 60;
self.date = [self.calendar dateFromComponents:components];
if ([self.date compare:self.minDate] == NSOrderedAscending) {
[self showDateOnPicker:self.minDate];
} else if ([self.date compare:self.maxDate] == NSOrderedDescending) {
[self showDateOnPicker:self.maxDate];
}
if ((self.delegate) && ([self.delegate respondsToSelector:@selector(dateChanged:)])) {
[self.delegate dateChanged:self];
}
}
@end
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