概述
自定義時(shí)間選擇器，難點(diǎn)在于時(shí)間數(shù)據(jù)的獲取，主要是在時(shí)間進(jìn)位的時(shí)候，數(shù)據(jù)可能會(huì)大范圍的改變，列如：
在59分時(shí)，進(jìn)位后下一分鐘是0分，此時(shí)小時(shí)值會(huì)加1，如果上一分鐘小時(shí)數(shù)為23，則小時(shí)數(shù)據(jù)進(jìn)位后變成第二天的0點(diǎn)，如果上一分鐘天數(shù)是月底最后一天，則進(jìn)位后月份也會(huì)跟著進(jìn)位加1，如果上一分鐘月份數(shù)為12，則進(jìn)位后月份數(shù)會(huì)變成1月，此時(shí)年份數(shù)加1。
另外一個(gè)注意事項(xiàng)是，時(shí)間是時(shí)時(shí)刻變化的，所以要保證時(shí)間選擇器上的數(shù)據(jù)正確有效，需要讓它過(guò)一段時(shí)間間隔就刷新重新獲取數(shù)據(jù)，然后刷新控件
界面效果圖
代碼
數(shù)據(jù)獲取的關(guān)鍵代碼
-(void)getData{
/*
獲取時(shí)間數(shù)據(jù)分為兩種情況，一種是常規(guī)數(shù)據(jù)，如一個(gè)月28/29/30/31天，一天24小時(shí),一小時(shí)60分鐘等，這個(gè)數(shù)據(jù)很好獲取
另一種情況是當(dāng)前的數(shù)據(jù)，當(dāng)前時(shí)間數(shù)據(jù)比較復(fù)雜，前提條件：分鐘只需要取10鐘一間隔得數(shù)據(jù)即：0、10、20、30、40、50，這樣獲取數(shù)據(jù)的時(shí)候需要在當(dāng)前時(shí)間加10分鐘，這樣的話(huà) 在50~59分，小時(shí)數(shù)據(jù)是沒(méi)有當(dāng)前的小時(shí)值可選的；在23時(shí)50~59分，當(dāng)前天數(shù)是不可選的；在每月的最后一天和每年的最后一天都有類(lèi)似的特殊情況，同時(shí)需要每個(gè)一分鐘更新一次當(dāng)前的時(shí)間的數(shù)據(jù)
*/
//在當(dāng)前時(shí)間加10分鐘，然后獲取年月日時(shí)分的值
NSDate * date = [NSDate dateWithTimeIntervalSinceNow:60*10];//提前10分鐘
NSCalendar * canlendar = [NSCalendar currentCalendar];
NSInteger unitFlags = NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay | NSCalendarUnitHour | NSCalendarUnitMinute | NSCalendarUnitSecond;
NSDateComponents * components = [canlendar components:unitFlags fromDate:date];
NSInteger nowY = [components year];
NSInteger nowM = [components month];
NSInteger nowD = [components day];
NSInteger nowH = [components hour];
NSInteger nowF = [components minute];
//給當(dāng)前值賦值--這些值主要是用于時(shí)間選擇器的第一次打開(kāi)時(shí)顯示當(dāng)前時(shí)間
self.defaultYear = [components year];
self.defaultMonth = [components month];
self.defaultDay = [components day];
self.defaultHour = [components hour];
NSLog(@"%ld",[components minute]);
self.defaultMinute = ([components minute]/10)*10 ;
//獲取當(dāng)前月的天數(shù)
NSRange range = [canlendar rangeOfUnit:NSCalendarUnitDay inUnit:NSCalendarUnitMonth forDate:date];
NSUInteger numberOfDaysInMonth = range.length;
NSMutableArray * nowPickerViewDataArr0 = [[NSMutableArray alloc] init];
NSMutableArray * nowPickerViewDataArr1 = [[NSMutableArray alloc] init];
NSMutableArray * nowPickerViewDataArr2 = [[NSMutableArray alloc] init];
NSMutableArray * nowPickerViewDataArr3 = [[NSMutableArray alloc] init];
NSMutableArray * nowPickerViewDataArr4 = [[NSMutableArray alloc] init];
//獲取當(dāng)前分鐘數(shù)
if (nowF >= 50) {//大于50分到59之間分鐘數(shù)需要特殊處理
self.defaultMinute = 0;
self.defaultHour+=1;
if (self.defaultHour == 24) {
self.defaultHour = 0;
}
for (int i = 0; i < 6; i++) {
[nowPickerViewDataArr4 addObject:[NSNumber numberWithInteger:i*10]];
}
}else{//小于50分，則只獲取當(dāng)前可選的分鐘值
for (NSInteger i = self.defaultMinute/10; i < 6; i++) {
[nowPickerViewDataArr4 addObject:[NSNumber numberWithInteger:i*10]];
}
}
//獲取當(dāng)前小時(shí)數(shù)
if (nowH >= 23&&nowH>=50) {//23點(diǎn)50分到59之間，當(dāng)前小時(shí)數(shù)需要特殊處理
self.defaultHour+=1;
self.defaultDay+=1;
if (self.defaultDay >numberOfDaysInMonth) {
self.defaultDay = 1;
}
for (int i = 0; i < 24; i++) {
[nowPickerViewDataArr3 addObject:[NSNumber numberWithInteger:i]];
}
}else{//
for (NSInteger i = self.defaultHour; i < 24; i++) {
[nowPickerViewDataArr3 addObject:[NSNumber numberWithInteger:i]];
}
}
//獲取當(dāng)前日數(shù)
if (nowD >= numberOfDaysInMonth&&nowH >= 23&&nowH>=50) {//每月最后一天23點(diǎn)50分到59之間，當(dāng)前小時(shí)數(shù)需要特殊處理
self.defaultDay+=1;
self.defaultMonth+=1;
if (self.defaultMonth >12) {
self.defaultMonth = 1;
}
for (int i = 1; i <= numberOfDaysInMonth; i++) {
[nowPickerViewDataArr2 addObject:[NSNumber numberWithInteger:i]];
}
}else{//
for (NSInteger i = self.defaultDay; i <= numberOfDaysInMonth; i++) {
[nowPickerViewDataArr2 addObject:[NSNumber numberWithInteger:i]];
}
}
//獲取當(dāng)前月份數(shù)
if (nowM >= 12&&nowD >= numberOfDaysInMonth&&nowH >= 23&&nowH>=50) {//每年12月最后一天23點(diǎn)50分到59之間，當(dāng)前小時(shí)數(shù)需要特殊處理
self.defaultMonth+=1;
self.defaultYear+=1;
if (self.defaultYear >nowY) {
self.defaultYear = nowY+1;
}
for (int i = 1; i <= 12; i++) {
[nowPickerViewDataArr1 addObject:[NSNumber numberWithInteger:i]];
}
}else{//
for (NSInteger i = self.defaultMonth; i <= 12; i++) {
[nowPickerViewDataArr1 addObject:[NSNumber numberWithInteger:i]];
}
}
//獲取年份
for (int i = 0; i < 3; i++) {
[nowPickerViewDataArr0 addObject:[NSNumber numberWithInteger:i+self.defaultYear]];
}
//將當(dāng)前時(shí)間的數(shù)據(jù)存到數(shù)組
[self.nowPickerViewDataArr addObject:nowPickerViewDataArr0];
[self.nowPickerViewDataArr addObject:nowPickerViewDataArr1];
[self.nowPickerViewDataArr addObject:nowPickerViewDataArr2];
[self.nowPickerViewDataArr addObject:nowPickerViewDataArr3];
[self.nowPickerViewDataArr addObject:nowPickerViewDataArr4];
//獲取常規(guī)數(shù)值
NSMutableArray * pickerViewDataArr1 = [[NSMutableArray alloc] init];
NSMutableArray * pickerViewDataArr2 = [[NSMutableArray alloc] init];
NSMutableArray * pickerViewDataArr3 = [[NSMutableArray alloc] init];
NSMutableArray * pickerViewDataArr4 = [[NSMutableArray alloc] init];
//分鐘
for (int i = 0; i < 6; i++) {
[pickerViewDataArr4 addObject:[NSNumber numberWithInteger:i*10]];
}
//小時(shí)
for (NSInteger i = 0; i < 24; i++) {
[pickerViewDataArr3 addObject:[NSNumber numberWithInteger:i]];
}
//天數(shù)
for (NSInteger i = 1; i <= numberOfDaysInMonth; i++) {
[pickerViewDataArr2 addObject:[NSNumber numberWithInteger:i]];
}
//月數(shù)
for (NSInteger i = 1; i <= 12; i++) {
[pickerViewDataArr1 addObject:[NSNumber numberWithInteger:i]];
}
[self.pickerViewDataArr addObject:nowPickerViewDataArr0];
[self.pickerViewDataArr addObject:pickerViewDataArr1];
[self.pickerViewDataArr addObject:pickerViewDataArr2];
[self.pickerViewDataArr addObject:pickerViewDataArr3];
[self.pickerViewDataArr addObject:pickerViewDataArr4];
}
pickerView返回行數(shù)的代理方法關(guān)鍵代碼
-(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component{
if (component == 0) {
return [self.nowPickerViewDataArr[0] count];
} else if(component == 1){
if (self.selectRow0 == 0) {
return [self.nowPickerViewDataArr[1] count];
} else {
return [self.pickerViewDataArr[1] count];
}
}else if (component ==2){
if (self.selectRow0 == 0&&self.selectRow1 == 0) {
return [self.nowPickerViewDataArr[2] count];
} else {
return [self.pickerViewDataArr[2] count];
}
}else if (component == 3){
if (self.selectRow2 == 0&&self.selectRow1 == 0&&self.selectRow0 == 0) {
return [self.nowPickerViewDataArr[3] count];
} else {
return [self.pickerViewDataArr[3] count];
}
}else{
if (self.selectRow3 ==0&&self.selectRow2 == 0&&self.selectRow1 == 0&&self.selectRow0 == 0) {
return [self.nowPickerViewDataArr[4] count];
} else {
return [self.pickerViewDataArr[4] count];
}
}
}
pickerView返回顯示值的代理方法關(guān)鍵代碼
-(UIView*)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view{
//添加一個(gè)label
UILabel * label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, kScreenWidth/5, 30)];
label.textColor = [UIColor grayColor];
label.font = [UIFont systemFontOfSize:15];
label.textAlignment = NSTextAlignmentLeft;
//對(duì)每一列都需要做特殊和非特殊的判斷，一遍給到正確的值
if (component == 0) {
label.text = [NSString stringWithFormat:@"%@",self.nowPickerViewDataArr[0][row]];
} else if(component == 1){
if (self.selectRow0 == 0) {
label.text = [NSString stringWithFormat:@"%@",self.nowPickerViewDataArr[1][row]];
} else {
label.text = [NSString stringWithFormat:@"%@",self.pickerViewDataArr[1][row]];
}
}else if (component ==2){
if (self.selectRow0 == 0&&self.selectRow1 == 0) {
label.text = [NSString stringWithFormat:@"%@",self.nowPickerViewDataArr[2][row]];
} else {
label.text = [NSString stringWithFormat:@"%@",self.pickerViewDataArr[2][row]];
}
}else if (component == 3){
if (self.selectRow2 == 0&&self.selectRow1 == 0&&self.selectRow0 == 0) {
label.text = [NSString stringWithFormat:@"%@",self.nowPickerViewDataArr[3][row]];
} else {
label.text = [NSString stringWithFormat:@"%@",self.pickerViewDataArr[3][row]];
}
}else{
if (self.selectRow3 ==0&&self.selectRow2 == 0&&self.selectRow1 == 0&&self.selectRow0 == 0) {
label.text = [NSString stringWithFormat:@"%@",self.nowPickerViewDataArr[4][row]];
} else {
label.text = [NSString stringWithFormat:@"%@",self.pickerViewDataArr[4][row]];
}
}
return label;
}
pickerView選擇行的代理方法關(guān)鍵代碼
-(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component{
//獲取選中的列數(shù)
self.selectRow0 = [pickerView selectedRowInComponent:0];
self.selectRow1 = [pickerView selectedRowInComponent:1];
self.selectRow2 = [pickerView selectedRowInComponent:2];
self.selectRow3 = [pickerView selectedRowInComponent:3];
self.selectRow4 = [pickerView selectedRowInComponent:4];
//先清空之前的數(shù)據(jù)，在重新獲取數(shù)據(jù)
self.pickerViewDataArr = nil;
self.nowPickerViewDataArr = nil;
[self getData];
//刷新后面的列
if (component == 0) {//選擇完成后加載后面的列的數(shù)據(jù)但是不刷新當(dāng)前列
[pickerView reloadComponent:1];
[pickerView reloadComponent:2];
[pickerView reloadComponent:3];
[pickerView reloadComponent:4];
} else if(component == 1){
[pickerView reloadComponent:2];
[pickerView reloadComponent:3];
[pickerView reloadComponent:4];
}else if(component == 2){
[pickerView reloadComponent:3];
[pickerView reloadComponent:4];
}else if(component == 3){
[pickerView reloadComponent:4];
}
}
詳細(xì)代碼看Demo
