第一次写博客,把自己做的一些笔记分享给大家,有简单的有复杂的,不喜请喷。
相信大家经常遇到列表时间上显示刚刚、几分钟前、几小时前、几天前、正常日期这样的展示方式。一般这种数据如果不是实时刷新都会由后台算好给返回,但是大多数这样显示的都是前台实时刷新哒,所以我们就写一个小小的算法咯,上代码步入正题。相信一切尽在不言中各为看官均能理解。
.h文件定义一个类方法
@interface CBGetTimeState : NSObject
+(NSString*)needChangeStringToTime:(NSString*)timeStr;
@end
.m文件实现代码
#import "CBGetTimeState.h"
@implementation CBGetTimeState
+(NSString*)needChangeStringToTime:(NSString*)timeStr
{
if (timeStr!=nil) {
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:@"YYYY-MM-dd HH:mm:ss"];
// NSTimeZone* timeZone = [NSTimeZone timeZoneWithName:@"Asia/Beijing"];
// [formatter setTimeZone:timeZone];
NSDate *dateModel = [formatter dateFromString:timeStr];
NSDate *dateNow = [formatter dateFromString:[self getNowTime]];
NSString *timeModel = [NSString stringWithFormat:@"%ld", (long)[dateModel timeIntervalSince1970]];
NSString *timeNow = [NSString stringWithFormat:@"%ld", (long)[dateNow timeIntervalSince1970]];
NSInteger time = ([timeNow integerValue] - [timeModel integerValue]);
NSString*resultStr=[[NSString alloc] init];
if (time<3*60) {
resultStr=@"刚刚";
}
else if (time>=3*60&&time<60*60)
{
resultStr=[NSString stringWithFormat:@"%ld分钟前",time/60];
}
else if (time>=60*60&&time<60*60*24)
{
resultStr=[NSString stringWithFormat:@"%ld小时前",time/(60*60)];
}
else if (time>=60*60*24&&time<60*60*24*3)
{
resultStr=[NSString stringWithFormat:@"%ld天前",time/(60*60*24)];
}
else
{
resultStr=[self timeState:timeStr];
}
return resultStr;
}
return nil;
}
+ (NSString *)getNowTime {
NSDate *senddate=[NSDate date];
NSDateFormatter *dateformatter=[[NSDateFormatter alloc] init];
[dateformatter setDateFormat:@"YYYY-MM-dd HH:mm:ss"];
NSString *locationString=[dateformatter stringFromDate:senddate];
return locationString;
}
//2015-11-03T09:52:59Z
+(NSString*)timeState:(NSString*)time
{
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:@"YYYY-MM-dd HH:mm:ss"];
NSDate *mydate=[formatter dateFromString:time];
[formatter setDateFormat:@"YYYY"];
NSInteger currentYear=[[formatter stringFromDate:mydate] integerValue];
[formatter setDateFormat:@"MM"];
NSInteger currentMonth=[[formatter stringFromDate:mydate]integerValue];
[formatter setDateFormat:@"dd"];
NSInteger currentDay=[[formatter stringFromDate:mydate] integerValue];
return [NSString stringWithFormat:@"%ld-%02ld-%02ld",(long)currentYear,(long)currentMonth,(long)currentDay];
}
@end
以上代码只需复制粘贴到您的项目中就可以使用啦。直接调用类方法传参,赋值。