Objective c NSDateFormatter setDateFormat参数

在php中，有一个可以传递给date函数以格式化日期的所有参数的列表

目标c也有类似的东西吗？

这里有一个：

有没有想过可以在NSDateFormatter中放入什么？足够实际地倾卸说明符和结果的麻烦了吗？不，我们也是。但有人发现了，他们发现了：

a: AM/PM
A: 0~86399999 (Millisecond of Day)

c/cc: 1~7 (Day of Week)
ccc: Sun/Mon/Tue/Wed/Thu/Fri/Sat
cccc: Sunday/Monday/Tuesday/Wednesday/Thursday/Friday/Saturday

d: 1~31 (0 padded Day of Month)
D: 1~366 (0 padded Day of Year)

e: 1~7 (0 padded Day of Week)
E~EEE: Sun/Mon/Tue/Wed/Thu/Fri/Sat
EEEE: Sunday/Monday/Tuesday/Wednesday/Thursday/Friday/Saturday

F: 1~5 (0 padded Week of Month, first day of week = Monday)

g: Julian Day Number (number of days since 4713 BC January 1)
G~GGG: BC/AD (Era Designator Abbreviated)
GGGG: Before Christ/Anno Domini

h: 1~12 (0 padded Hour (12hr))
H: 0~23 (0 padded Hour (24hr))

k: 1~24 (0 padded Hour (24hr)
K: 0~11 (0 padded Hour (12hr))

L/LL: 1~12 (0 padded Month)
LLL: Jan/Feb/Mar/Apr/May/Jun/Jul/Aug/Sep/Oct/Nov/Dec
LLLL: January/February/March/April/May/June/July/August/September/October/November/December

m: 0~59 (0 padded Minute)
M/MM: 1~12 (0 padded Month)
MMM: Jan/Feb/Mar/Apr/May/Jun/Jul/Aug/Sep/Oct/Nov/Dec
MMMM: January/February/March/April/May/June/July/August/September/October/November/December

q/qq: 1~4 (0 padded Quarter)
qqq: Q1/Q2/Q3/Q4
qqqq: 1st quarter/2nd quarter/3rd quarter/4th quarter
Q/QQ: 1~4 (0 padded Quarter)
QQQ: Q1/Q2/Q3/Q4
QQQQ: 1st quarter/2nd quarter/3rd quarter/4th quarter

s: 0~59 (0 padded Second)
S: (rounded Sub-Second)

u: (0 padded Year)

v~vvv: (General GMT Timezone Abbreviation)
vvvv: (General GMT Timezone Name)

w: 1~53 (0 padded Week of Year, 1st day of week = Sunday, NB: 1st week of year starts from the last Sunday of last year)
W: 1~5 (0 padded Week of Month, 1st day of week = Sunday)

y/yyyy: (Full Year)
yy/yyy: (2 Digits Year)
Y/YYYY: (Full Year, starting from the Sunday of the 1st week of year)
YY/YYY: (2 Digits Year, starting from the Sunday of the 1st week of year)

z~zzz: (Specific GMT Timezone Abbreviation)
zzzz: (Specific GMT Timezone Name)
Z: +0000 (RFC 822 Timezone)

这将一次性解决您的日期和时间格式化需求

更新：

---

unicode.org上的最终列表位于

@IuliusCæsar，但苹果文档中是否有格式说明符？我从来没有在那里找到过它们。@yuji:The包含指向unicode格式设置程序的链接。orgI已经看过这些文档，但没有一个列表像我发布链接的php列表。@IuliusCæsar啊，真的很好，谢谢，这正是我想要的。除此之外，是否有日期后缀的参数，例如th，st，rd，我在列表中看不到。该网站很难理解。这个答案并不准确。如果需要零填充，则必须始终重复特定字符。例如，要输入分钟数，必须输入“mm”，而不仅仅是“m”（05和5之间的差值）。接下来是d，d，h，h，k，k，m，s，大概是w。