方式一 后台给的格式为yyyy-MM-dd HH:mm:ss.SSS
+ (NSString *) compareCurrentTime:(NSString *)str
{
//把字符串转为NSdate
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss.SSS"];
NSDate *timeDate = [dateFormatter dateFromString:str];
//得到与当前时间差
NSTimeInterval timeInterval = [timeDate timeIntervalSinceNow];
timeInterval = -timeInterval;
//标准时间和北京时间差8个小时
timeInterval = timeInterval - 8*60*60;
long temp = 0;
NSString *result;
if (timeInterval < 60) {
result = [NSString stringWithFormat:@"刚刚"];
}
else if((temp = timeInterval/60) <60){
result = [NSString stringWithFormat:@"%d分钟前",temp];
}
else if((temp = temp/60) <24){
result = [NSString stringWithFormat:@"%d小时前",temp];
}
else if((temp = temp/24) <30){
result = [NSString stringWithFormat:@"%d天前",temp];
}
else if((temp = temp/30) <12){
result = [NSString stringWithFormat:@"%d月前",temp];
}
else{
temp = temp/12;
result = [NSString stringWithFormat:@"%d年前",temp];
}
return result;
}
方式二 后台给的格式为 纯数字1352170595000
(13位)
/** 通过行数, 返回更新时间 */
- (NSString *)updateTimeForRow:(NSInteger)row {
// 获取当前时时间戳 1466386762.345715 十位整数 6位小数
NSTimeInterval currentTime = [[NSDate date] timeIntervalSince1970];
// 创建歌曲时间戳(后台返回的时间 一般是13位数字)
NSTimeInterval createTime = self.model.tracks.list[row].createdAt/1000;
// 时间差
NSTimeInterval time = currentTime - createTime;
// 秒转小时
NSInteger hours = time/3600;
if (hours<24) {
return [NSString stringWithFormat:@"%ld小时前",hours];
}
//秒转天数
NSInteger days = time/3600/24;
if (days < 30) {
return [NSString stringWithFormat:@"%ld天前",days];
}
//秒转月
NSInteger months = time/3600/24/30;
if (months < 12) {
return [NSString stringWithFormat:@"%ld月前",months];
}
//秒转年
NSInteger years = time/3600/24/30/12;
return [NSString stringWithFormat:@"%ld年前",years];
}
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修改如下:
+ (NSString *)compareCurrentTime:(NSString *)str
{
//把字符串转为NSdate
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
NSDate *timeDate = [dateFormatter dateFromString:str];
//得到与当前时间差
NSTimeInterval time = fabs([[NSDate date] timeIntervalSinceDate:timeDate]);
NSString *returnString = @"";
if(time < 60)
returnString = @"刚刚";
else if(time >=60 && time < 3600)
returnString = [NSString stringWithFormat:@"%.0f分钟前",time/60];
else if(time >= 3600 && time < 3600 * 24)
returnString = [NSString stringWithFormat:@"%.0f小时前",time/(60 * 60)];
else if(time >= 3600 * 24 && time < 3600 * 24 * 30)
returnString = [NSString stringWithFormat:@"%.0f天前",time/(60 * 60 * 24)];
else if(time >= 3600 * 24 * 30 && time < 3600 * 24 * 30 * 12)
returnString = [NSString stringWithFormat:@"%.0f月前",time/(60 * 60 * 24 * 30)];
else if(time >= 3600 * 24 * 30 * 12)
returnString = [NSString stringWithFormat:@"%.0f年前",time/(60 * 60 * 24 * 30 * 12)];
return returnString;
}
NSTimeInterval timeInterval = [timeDate timeIntervalSinceNow];
timeInterval = -timeInterval;
//标准时间和北京时间差8个小时
timeInterval = timeInterval - 8*60*60;
Xcode 8.3.3版本上加上这几行会出现很严重的偏差
并且,我在 NSTimeInterval 后面的一句代码修改了,就是这句
[date2 timeIntervalSinceDate:timeDate];
用当前时间去对比过去时间
这样下来才能得到正确的时间
希望书友能接受!
方法需要改变一下,整个如下:
+ (NSString *)compareCurrentTime:(NSString *)str
{
//把字符串转为NSdate
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
NSDate *timeDate = [dateFormatter dateFromString:str];
//得到与当前时间差
NSTimeInterval time = fabs([[NSDate date] timeIntervalSinceDate:timeDate]);
NSString *returnString = @"";
if(time < 60)
returnString = @"刚刚";
else if(time >=60 && time < 3600)
returnString = [NSString stringWithFormat:@"%.0f分钟前",time/60];
else if(time >= 3600 && time < 3600 * 24)
returnString = [NSString stringWithFormat:@"%.0f小时前",time/(60 * 60)];
else if(time >= 3600 * 24 && time < 3600 * 24 * 30)
returnString = [NSString stringWithFormat:@"%.0f天前",time/(60 * 60 * 24)];
else if(time >= 3600 * 24 * 30 && time < 3600 * 24 * 30 * 12)
returnString = [NSString stringWithFormat:@"%.0f月前",time/(60 * 60 * 24 * 30)];
else if(time >= 3600 * 24 * 30 * 12)
returnString = [NSString stringWithFormat:@"%.0f年前",time/(60 * 60 * 24 * 30 * 12)];
return returnString;
}
手机打字,不是很方便,还是不懂得话我回去用电脑回你!
我们的任务就是把时间戳转换成时分秒!