我有一个JSON对象有几个日期,例如:15/12/2005或14/12/2012。
我需要对今天的月和日进行比较;这一年并不重要。我这样做:
-(void)setSingle:(NSDictionary*)object name:(NSString*)name {
NSMutableDictionary * content = [[NSMutableDictionary alloc] initWithDictionary:[[NSUserDefaults standardUserDefaults] objectForKey:name]];
NSLog(@"%@", name);
if(name == @"teste") {
NSDate *dateReturn = [[NSDate alloc] init];
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"dd-MM"];
NSString * tempDate;
NSDictionary *dateObjectTemp = nil;
NSDictionary * dateObject = [object objectForKey:name];
for (NSDictionary*g in dateObject) {
tempDate = [g objectForKey:@"dia"];
dateObjectTemp = g;
NSLog(@"Data: %@", tempDate);
dateReturn = [dateFormatter dateFromString:tempDate];
NSLog(@"Data: %@", dateReturn);
[content setObject:dateObjectTemp forKey:tempDate];
}
} else {
NSDate *dateReturn = [[NSDate alloc] init];
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"dd-MM-yyyy"];
NSString * tempDate;
NSDictionary *dateObjectTemp = nil;
NSDictionary * dateObject = [object objectForKey:name];
for (NSDictionary*g in dateObject) {
tempDate = [g objectForKey:@"dia"];
dateObjectTemp = g;
dateReturn = [dateFormatter dateFromString:tempDate];
[content setObject:dateObjectTemp forKey:tempDate];
}
}
NSDictionary* cont =content;
[[NSUserDefaults standardUserDefaults] removeObjectForKey:name];
[[NSUserDefaults standardUserDefaults] setObject:cont forKey:name];
}
这会选择日期,但dataReturn
会返回2000-12-15。我只想要日和月。
什么时候会比较下一个方法
-(void)showContent{
if ( [self daysBetweenDate:currentDate andDate:self.dateLimit]>=0 ) {
NSDictionary *santododia = [super compareDate:currentDate name:@"santos"];
[self defineContent:[santododia objectForKey:@"texto"]];
self.urlShare = [santododia objectForKey:@"url"];
self.tituloShare = [santododia objectForKey:@"titulo"];
}else{
[self.webView loadHTMLString: @"<font color='black' style='font-family:sans-serif;'>Conteúdo indisponível, escolha a data de hoje ou anterior</font>" baseURL:nil];
}
}
虽然当前日期匹配,但测试未通过。
-(void) defineContent:(NSString *)string{
string = [parentClass checkStringContent:string];
NSLog(@"Teste: %@", string);
if(string.length == 0){
string = @"<font color='black' style='font-family:sans-serif;'>nothing</font>";
} else {
string = [NSString stringWithFormat: @"%@ %@", string , @"<style>body {color:#000 !important} .day{margin-top:5px} .month{margin-top:5px} </style>" ];
}
[self.webView loadHTMLString: string baseURL:nil];
}
答案 0 :(得分:0)
要仅比较日期的某些部分,您应使用NSDateComponents
。使用NSDate
将您的字符串解析为NSDateFormatter
:
NSString * jsonDateString = @"15/12/2005";
NSDateFormatter * dF = [NSDateFormatter new];
// Format string must match date string!
dF.dateFormat = @"dd/MM/yyy";
NSDate * testDate = [dF dateFromString:jsonDateString];
NSDate * today = [NSDate date];
从那里开始,您使用NSCalendar
到decompose that date,今天就可以了解您感兴趣的内容:
NSCalendar * cal = [NSCalendar currentCalendar];
NSDateComponents * todayComps = [cal components:NSCalendarUnitMonth|NSCalendarUnitDay
fromDate:today];
NSDateComponents * testComps = [cal components:NSCalendarUnitMonth|NSCalendarUnitDay
fromDate:testDate];
然后您可以比较这些日期组件对象:
[testComps isEqual:todayComps]
如果结果为YES
,则两个日期具有相同的日期和月份,忽略日期的所有其他部分,包括年份。
答案 1 :(得分:-1)
尝试此比较日期 -
NSDate *minDate ;
NSDate *maxDate ;
NSComparisonResult compareStart = [minDate compare: self.selectedDate]; // date1 is 6/6/2011 00:00
NSComparisonResult compareEnd = [maxDate compare: self.selectedDate]; // date2 is 9/6/2011 00:00
if ( ( (compareStart == NSOrderedAscending) || (compareStart == NSOrderedSame) ) && (compareEnd == NSOrderedDescending))
{
NSLog(@"date is in the right range");
}
else {
NSLog(@"Range is not valid .");
}