时间跨度的智能格式化

问题描述

我需要一个方法将 NSTimeInterval （时间跨度以秒为单位）格式化为一个字符串，以便在大约10分钟前产生类似于 ，1h，20min或少于1分钟。

   - （NSString *）formattedTimeSpan：（NSTimeInterval）interval; 
  

目标平台是iOS。示例代码是受欢迎的。

解决方案

这是NSDate的一个类别。它不是完全使用NSTimeInterval，内部很好:)我假设你正在使用时间戳。
$ b 头文件NSDate + PrettyDate.h

  @interface NSDate（PrettyDate）
 
  - （NSString *）prettyDate; 
 
 $ end 
 
 
 
 
 $ b 
 实现NSDate + PrettyDate.m   
 
 
  @implementation NSDate（PrettyDate）
 
  - （NSString *）prettyDate 
 {
 NSString * prettyTimestamp; 
 
 float delta = [self timeIntervalSinceNow] * -1; 
 
 if（delta  prettyTimestamp = @just now; 
} else if（delta  prettyTimestamp = @一分钟前; 
} else if（delta  prettyTimestamp = [NSString stringWithFormat：@％d分钟前，（int）floor（delta / 60.0）]; 
} else if（delta  prettyTimestamp = @1小时前; 
} else if（delta  prettyTimestamp = [NSString stringWithFormat：@％d hours ago，（int）floor（delta / 3600.0）]; 
} else if（delta  prettyTimestamp = @一天前; 
} else if（delta  prettyTimestamp = [NSString stringWithFormat：@％d days ago，（int）floor（delta / 86400.0）]; 
} else {
 NSDateFormatter * formatter = [[NSDateFormatter alloc] init]; 
 [formatter setDateStyle：NSDateFormatterMediumStyle]; 
 
 prettyTimestamp = [NSString stringWithFormat：@on％@，[formatter stringFromDate：self]]; 
 [formatter release]; 
} 
 
 return prettyTimestamp; 
} 
  
 
I need a method to format a NSTimeInterval (time span in seconds) into a string to produce something like "about 10 minutes ago", "1h, 20min", or "less than 1 minute".
-(NSString*) formattedTimeSpan:(NSTimeInterval)interval;
Target platform is iOS. Sample code is welcome.
 解决方案 
This is a category for NSDate. It's not exactly using an NSTimeInterval, well internally :) I assume you are working with timestamps.
Header file NSDate+PrettyDate.h
@interface NSDate (PrettyDate)

- (NSString *)prettyDate;

@end
Implementation NSDate+PrettyDate.m
@implementation NSDate (PrettyDate)

- (NSString *)prettyDate
{
    NSString * prettyTimestamp;

    float delta = [self timeIntervalSinceNow] * -1;

    if (delta < 60) {
        prettyTimestamp = @"just now";
    } else if (delta < 120) {
        prettyTimestamp = @"one minute ago";
    } else if (delta < 3600) {
        prettyTimestamp = [NSString stringWithFormat:@"%d minutes ago", (int) floor(delta/60.0) ];
    } else if (delta < 7200) {
        prettyTimestamp = @"one hour ago";      
    } else if (delta < 86400) {
        prettyTimestamp = [NSString stringWithFormat:@"%d hours ago", (int) floor(delta/3600.0) ];
    } else if (delta < ( 86400 * 2 ) ) {
        prettyTimestamp = @"one day ago";       
    } else if (delta < ( 86400 * 7 ) ) {
        prettyTimestamp = [NSString stringWithFormat:@"%d days ago", (int) floor(delta/86400.0) ];
    } else {
        NSDateFormatter * formatter = [[NSDateFormatter alloc] init];
        [formatter setDateStyle:NSDateFormatterMediumStyle];

        prettyTimestamp = [NSString stringWithFormat:@"on %@", [formatter stringFromDate:self]];
        [formatter release];
    }

    return prettyTimestamp;
}
                        
这篇关于时间跨度的智能格式化的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！