iOS下的日期时间字符串格式化.
Ever wonder just what you could put in NSDateFormatter format strings? Enough to actually go to the trouble of actually dumping specifiers and results? Nah, us neither. But somebody did, and here’s what they found:
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)
