v1.3.1新增DiffForHumans()方法，并且支持多语言

README.en.md

@@ -390,13 +390,15 @@ carbon.Parse("2020-08-05 13:14:15").DiffInSeconds(carbon.Parse("2020-08-05 13:14
 carbon.Parse("2020-08-05 13:14:15").DiffInSecondsWithAbs(carbon.Parse("2020-08-05 13:14:14")) // 1
 
 // Difference for humans in English
-carbon.Parse("2019-08-05 13:14:15").DiffForHumans()) // 1 years before
-carbon.Parse("2018-08-05 13:14:15").DiffForHumans()) // 2 year before
-carbon.Parse("2021-08-05 13:14:15").DiffForHumans()) // 1 year after
-carbon.Parse("2022-08-05 13:14:15").DiffForHumans()) // 2 years after
+carbon.Now().DiffForHumans()) // just now
+carbon.Now().SubYears(1).DiffForHumans()) // 1 years ago
+carbon.Now().SubYears(2).DiffForHumans()) // 2 year ago
+carbon.Now().AddYears(1).DiffForHumans()) // in 1 year
+carbon.Now().AddYears(2).DiffForHumans()) // in 2 years
 // Difference for humans in Chinese
-carbon.Parse("2020-07-05 13:14:15").SetLocale("zh-CN").DiffForHumans()) // 1 月前
-carbon.Parse("2020-09-05 13:14:15").SetLocale("zh-CN").DiffForHumans()) // 2 月后
+carbon.Now().SetLocale("zh-CN").DiffForHumans()) // 刚刚
+carbon.Now().SubMonths(1).SetLocale("zh-CN").DiffForHumans()) // 1 月前
+carbon.Now().AddMonths(2).SetLocale("zh-CN").DiffForHumans()) // 2 月后
 ```
 
 ##### Time compare

README.md

@@ -391,14 +391,15 @@ carbon.Parse("2020-08-05 13:14:15").DiffInSecondsWithAbs(carbon.Parse("2020-08-0
 
 // 对人类友好的可读格式时间差(默认英文)
 carbon.Now().DiffForHumans()) // just now
-carbon.Parse("2019-08-05 13:14:15").DiffForHumans()) // 1 years before
-carbon.Parse("2018-08-05 13:14:15").DiffForHumans()) // 2 year before
-carbon.Parse("2021-08-05 13:14:15").DiffForHumans()) // 1 year after
-carbon.Parse("2022-08-05 13:14:15").DiffForHumans()) // 2 years after
+carbon.Now().SubYears(1).DiffForHumans()) // 1 years ago
+carbon.Now().SubYears(2).DiffForHumans()) // 2 year ago
+carbon.Now().AddYears(1).DiffForHumans()) // in 1 year
+carbon.Now().AddYears(2).DiffForHumans()) // in 2 years
 // 对人类友好的可读格式时间差(指定语言)
 carbon.Now().SetLocale("zh-CN").DiffForHumans()) // 刚刚
-carbon.Parse("2020-07-05 13:14:15").SetLocale("zh-CN").DiffForHumans()) // 1 月前
-carbon.Parse("2020-09-05 13:14:15").SetLocale("zh-CN").DiffForHumans()) // 2 月后
+carbon.Now().SubMonths(1).SetLocale("zh-CN").DiffForHumans()) // 1 月前
+carbon.Now().AddMonths(2).SetLocale("zh-CN").DiffForHumans()) // 2 月后
+
 ```
 
 ##### 时间比较

final.go

@@ -393,10 +393,10 @@ func (c Carbon) DiffForHumans() string {
 	c = c.SetLocale(locale)
 	translation := c.Lang.translate(unit, count)
 	if c.IsFuture() {
-		return strings.Replace(c.Lang.resources["after"], "{time}", translation, 1)
+		return strings.Replace(c.Lang.resources["future"], "{time}", translation, 1)
 	}
 	if c.IsPast() {
-		return strings.Replace(c.Lang.resources["before"], "{time}", translation, 1)
+		return strings.Replace(c.Lang.resources["past"], "{time}", translation, 1)
 	}
 	return c.Lang.resources["now"]
 }

final_test.go

@@ -976,15 +976,15 @@ func TestCarbon_DiffForHumans1(t *testing.T) {
 		output string // 期望输出值
 	}{
 		{Now().ToDateTimeString(), "just now"},
-		{Now().AddYears(1).ToDateTimeString(), "1 year after"},
-		{Now().SubYears(1).ToDateTimeString(), "1 year before"},
-		{Now().AddYears(10).ToDateTimeString(), "10 years after"},
-		{Now().SubYears(10).ToDateTimeString(), "10 years before"},
-
-		{Now().AddMonths(1).ToDateTimeString(), "1 month after"},
-		{Now().SubMonths(1).ToDateTimeString(), "1 month before"},
-		{Now().AddMonths(10).ToDateTimeString(), "10 months after"},
-		{Now().SubMonths(10).ToDateTimeString(), "10 months before"},
+		{Now().AddYears(1).ToDateTimeString(), "in 1 year"},
+		{Now().SubYears(1).ToDateTimeString(), "1 year ago"},
+		{Now().AddYears(10).ToDateTimeString(), "in 10 years"},
+		{Now().SubYears(10).ToDateTimeString(), "10 years ago"},
+
+		{Now().AddMonths(1).ToDateTimeString(), "in 1 month"},
+		{Now().SubMonths(1).ToDateTimeString(), "1 month ago"},
+		{Now().AddMonths(10).ToDateTimeString(), "in 10 months"},
+		{Now().SubMonths(10).ToDateTimeString(), "10 months ago"},
 	}
 
 	for _, v := range Tests {

lang/en.json

@@ -7,6 +7,6 @@
 	"minute":"1 minute|{count} minutes",
 	"second":"1 second|{count} seconds",
 	"now": "just now",
-	"after":"{time} after",
-	"before":"{time} before"
+	"past":"{time} ago",
+	"future":"in {time}"
 }

lang/zh-CN.json

@@ -7,6 +7,6 @@
 	"minute":"{count} 分钟",
 	"second":"{count} 秒",
 	"now": "刚刚",
-	"after":"{time}后",
-	"before":"{time}前"
+	"past":"{time}前",
+	"future":"{time}后"
 }

lang/zh-TW.json

@@ -7,6 +7,6 @@
 	"minute":"{count} 分鐘",
 	"second":"{count} 秒",
 	"now": "剛剛",
-	"after":"{time}後",
-	"before":"{time}前"
+	"past":"{time}前",
+	"future":"{time}後"
 }