ios - Know when to use short or full month names -

ios - Know when to use short or full month names -

under ios 7 or 8, stock calendar app have been unable figure out.

under locales, such en_us, calendar app shows short (3-letter) month names.

under other locales, such de_de, calendar app shows total month names. interestingly, locale en_de shows short month names seems tied language more part format.

what can't figure out how know month format use.

regardless of device's locale, nsdateformatter standaloneshortmonthsymbols gives me 3-letter month names , nsdateformatter standalonemonthsymbols gives me total month names.

is tried:

nsstring *monthformat = [nsdateformatter dateformatfromtemplate:@"lll" options:0 locale:[nslocale currentlocale]];

and gives same lll both en_us , de_de.

looking @ nslocale there doesn't appear value determines whether utilize short or total month names.

there doesn't appear in nscalendar, nsdateformatter, or nslocale help determine month format use.

does have thought how create determination?

update:

i thought found solution doesn't work locales tried. ran next code various locales see if find in mutual between locales show short , long months names in calendar app:

nslocale *locale = [nslocale currentlocale]; nsstring *locid = [locale localeidentifier]; nslog(@"locale = %@", locid); nsdateformatter *formatter = [[nsdateformatter alloc] init]; nslog(@"monthsymbols = %@", [formatter monthsymbols]); nslog(@"shortmonthsymbols = %@", [formatter shortmonthsymbols]); nslog(@"veryshortmonthsymbols = %@", [formatter veryshortmonthsymbols]); nslog(@"monthstandalonesymbols = %@", [formatter standalonemonthsymbols]); nslog(@"shortstandalonemonthsymbols = %@", [formatter shortstandalonemonthsymbols]); nslog(@"veryshortstandalonemonthsymbols = %@", [formatter veryshortstandalonemonthsymbols]); nsdate *date = [nsdate date]; [formatter setdatestyle:nsdateformattershortstyle]; nslog(@"short date style: %@", [formatter stringfromdate:date]); [formatter setdatestyle:nsdateformattermediumstyle]; nslog(@"medium date style: %@", [formatter stringfromdate:date]); [formatter setdatestyle:nsdateformatterlongstyle]; nslog(@"long date style: %@", [formatter stringfromdate:date]); [formatter setdatestyle:nsdateformatterfullstyle]; nslog(@"full date style: %@", [formatter stringfromdate:date]); [formatter setdatestyle:nsdateformatternostyle]; [formatter setdateformat:@"m"]; nslog(@"m date format: %@", [formatter stringfromdate:date]); [formatter setdateformat:@"mm"]; nslog(@"mm date format: %@", [formatter stringfromdate:date]); [formatter setdateformat:@"mmm"]; nslog(@"mmm date format: %@", [formatter stringfromdate:date]); [formatter setdateformat:@"mmmm"]; nslog(@"mmmm date format: %@", [formatter stringfromdate:date]); [formatter setdateformat:@"mmmmm"]; nslog(@"mmmmm date format: %@", [formatter stringfromdate:date]); [formatter setdateformat:@"l"]; nslog(@"l date format: %@", [formatter stringfromdate:date]); [formatter setdateformat:@"ll"]; nslog(@"ll date format: %@", [formatter stringfromdate:date]); [formatter setdateformat:@"lll"]; nslog(@"lll date format: %@", [formatter stringfromdate:date]); [formatter setdateformat:@"llll"]; nslog(@"llll date format: %@", [formatter stringfromdate:date]); [formatter setdateformat:@"lllll"]; nslog(@"lllll date format: %@", [formatter stringfromdate:date]);

i had tested en_us, en_gb, es_es, de_de, fr_fr, , it_it. french , high german locales show total month name in calendar app while rest show short name.

the 1 thing looked promising test code french , high german locales have period @ end of shortmonthsymbols.

so ran next code find locales utilize punctuation in short month symbols , don't:

nsmutablearray *hasdot = [[nsmutablearray alloc] init]; nsmutablearray *nodot = [[nsmutablearray alloc] init]; nscharacterset *letters = [nscharacterset lettercharacterset]; nsarray *locales = [nslocale availablelocaleidentifiers]; (nsstring *locid in locales) { nslocale *locale = [nslocale localewithlocaleidentifier:locid]; nsdateformatter *formatter = [[nsdateformatter alloc] init]; [formatter setlocale:locale]; nsarray *shortnames = [formatter shortmonthsymbols]; //nslog(@"locale: %@, short names: %@", locid, shortnames[10]); nsstring *nov = shortnames[10]; unichar char1 = [nov characteratindex:0]; unichar charn = [nov characteratindex:nov.length - 1]; if ([letters characterismember:char1] && [letters characterismember:charn]) { [nodot addobject:locid]; } else { [hasdot addobject:locid]; } } nslog(@"no dot: %@", [nodot sortedarrayusingselector:@selector(compare:)]); nslog(@"has dot: %@", [hasdot sortedarrayusingselector:@selector(compare:)]);

scanning through results saw dutch locales used period in short month symbols. quick test of calendar app revealed calendar app showed short month names when device set dutch (nl_nl). ugh.

update 2:

i've tested few more locales. next show long month names:

fr_fr, de_de, ru_ru, sv_se (actually locales each of these languages)

the next (and i'm sure many more) show short month:

en_us, en_gb, es_es, it_it, nl_nl, ca_es, uk_ua, ro_ro (actually locales each of these languages)

once every often, there comes question worth looking into. rick, debugged calendar app (can done using attaching mobilecal process). comes downwards eventkitui`currentlocalerequiresunabbrevatedmonthnames answers desired question.

let's @ disassembly:

eventkitui`currentlocalerequiresunabbrevatedmonthnames: 0x102c6bec7: pushq %rbp 0x102c6bec8: movq %rsp, %rbp 0x102c6becb: pushq %r15 0x102c6becd: pushq %r14 0x102c6becf: pushq %rbx 0x102c6bed0: subq $0xb8, %rsp 0x102c6bed7: movq 0x14a3aa(%rip), %r15 ; (void *)0x0000000104e93070: __stack_chk_guard 0x102c6bede: movq (%r15), %rax 0x102c6bee1: movq %rax, -0x20(%rbp) 0x102c6bee5: cmpq $0x0, 0x1c01fb(%rip) ; currentlocalerequiresunabbrevatedmonthnames.usesfulllengthmonthnames + 6 0x102c6beed: je 0x102c6beff ; currentlocalerequiresunabbrevatedmonthnames + 56 0x102c6beef: movb 0x1c01eb(%rip), %al ; currentlocalerequiresunabbrevatedmonthnames.haschecked 0x102c6bef5: xorb $0x1, %al 0x102c6bef7: testb $0x1, %al 0x102c6bef9: je 0x102c6c0d6 ; currentlocalerequiresunabbrevatedmonthnames + 527 0x102c6beff: movq 0x1b583a(%rip), %rdi ; (void *)0x00000001025dae58: nslocale 0x102c6bf06: movq 0x1aef23(%rip), %rsi ; "currentlocale" 0x102c6bf0d: movq 0x14a524(%rip), %r14 ; (void *)0x0000000104945000: objc_msgsend 0x102c6bf14: callq *%r14 0x102c6bf17: movq %rax, %rdi 0x102c6bf1a: callq 0x102d29920 ; symbol stub for: objc_retainautoreleasedreturnvalue 0x102c6bf1f: movq %rax, %rbx 0x102c6bf22: movq 0x14a227(%rip), %rax ; (void *)0x00000001025a3cd8: nslocalelanguagecode 0x102c6bf29: movq (%rax), %rdx 0x102c6bf2c: movq 0x1ae12d(%rip), %rsi ; "objectforkey:" 0x102c6bf33: movq %rbx, %rdi 0x102c6bf36: callq *%r14 0x102c6bf39: movq %rax, %rdi 0x102c6bf3c: callq 0x102d29920 ; symbol stub for: objc_retainautoreleasedreturnvalue 0x102c6bf41: movq %rax, %r14 0x102c6bf44: movq %rbx, %rdi 0x102c6bf47: callq *0x14a4f3(%rip) ; (void *)0x00000001049429b0: objc_release 0x102c6bf4d: movq 0x1c0194(%rip), %rdi ; __languagesrequiringunabbreviatedmonthnames 0x102c6bf54: testq %rdi, %rdi 0x102c6bf57: jne 0x102c6c0b0 ; currentlocalerequiresunabbrevatedmonthnames + 489 0x102c6bf5d: leaq 0x15425c(%rip), %rax ; @"ru" 0x102c6bf64: movq %rax, -0xd0(%rbp) 0x102c6bf6b: leaq 0x1524ce(%rip), %rax ; @"de" 0x102c6bf72: movq %rax, -0xc8(%rbp) 0x102c6bf79: leaq 0x154260(%rip), %rax ; @"fr" 0x102c6bf80: movq %rax, -0xc0(%rbp) 0x102c6bf87: leaq 0x154272(%rip), %rax ; @"fi" 0x102c6bf8e: movq %rax, -0xb8(%rbp) 0x102c6bf95: leaq 0x154284(%rip), %rax ; @"pt" 0x102c6bf9c: movq %rax, -0xb0(%rbp) 0x102c6bfa3: leaq 0x154296(%rip), %rax ; @"no" 0x102c6bfaa: movq %rax, -0xa8(%rbp) 0x102c6bfb1: leaq 0x1542a8(%rip), %rax ; @"nb" 0x102c6bfb8: movq %rax, -0xa0(%rbp) 0x102c6bfbf: leaq 0x1542ba(%rip), %rax ; @"nn" 0x102c6bfc6: movq %rax, -0x98(%rbp) 0x102c6bfcd: leaq 0x1542cc(%rip), %rax ; @"sv" 0x102c6bfd4: movq %rax, -0x90(%rbp) 0x102c6bfdb: leaq 0x1542de(%rip), %rax ; @"he" 0x102c6bfe2: movq %rax, -0x88(%rbp) 0x102c6bfe9: leaq 0x1542f0(%rip), %rax ; @"th" 0x102c6bff0: movq %rax, -0x80(%rbp) 0x102c6bff4: leaq 0x154305(%rip), %rax ; @"hi" 0x102c6bffb: movq %rax, -0x78(%rbp) 0x102c6bfff: leaq 0x15431a(%rip), %rax ; @"bn" 0x102c6c006: movq %rax, -0x70(%rbp) 0x102c6c00a: leaq 0x15432f(%rip), %rax ; @"mr" 0x102c6c011: movq %rax, -0x68(%rbp) 0x102c6c015: leaq 0x154344(%rip), %rax ; @"ur" 0x102c6c01c: movq %rax, -0x60(%rbp) 0x102c6c020: leaq 0x154359(%rip), %rax ; @"te" 0x102c6c027: movq %rax, -0x58(%rbp) 0x102c6c02b: leaq 0x15436e(%rip), %rax ; @"ta" 0x102c6c032: movq %rax, -0x50(%rbp) 0x102c6c036: leaq 0x154383(%rip), %rax ; @"gu" 0x102c6c03d: movq %rax, -0x48(%rbp) 0x102c6c041: leaq 0x154398(%rip), %rax ; @"kn" 0x102c6c048: movq %rax, -0x40(%rbp) 0x102c6c04c: leaq 0x1543ad(%rip), %rax ; @"ml" 0x102c6c053: movq %rax, -0x38(%rbp) 0x102c6c057: leaq 0x1543c2(%rip), %rax ; @"ne" 0x102c6c05e: movq %rax, -0x30(%rbp) 0x102c6c062: leaq 0x1543d7(%rip), %rax ; @"pa" 0x102c6c069: movq %rax, -0x28(%rbp) 0x102c6c06d: movq 0x1b55ec(%rip), %rdi ; (void *)0x00000001025d9cd8: nsarray 0x102c6c074: movq 0x1ae5cd(%rip), %rsi ; "arraywithobjects:count:" 0x102c6c07b: leaq -0xd0(%rbp), %rdx 0x102c6c082: movl $0x16, %ecx 0x102c6c087: callq *0x14a3ab(%rip) ; (void *)0x0000000104945000: objc_msgsend 0x102c6c08d: movq %rax, %rdi 0x102c6c090: callq 0x102d29920 ; symbol stub for: objc_retainautoreleasedreturnvalue 0x102c6c095: movq 0x1c004c(%rip), %rdi ; __languagesrequiringunabbreviatedmonthnames 0x102c6c09c: movq %rax, 0x1c0045(%rip) ; __languagesrequiringunabbreviatedmonthnames 0x102c6c0a3: callq *0x14a397(%rip) ; (void *)0x00000001049429b0: objc_release 0x102c6c0a9: movq 0x1c0038(%rip), %rdi ; __languagesrequiringunabbreviatedmonthnames 0x102c6c0b0: movq 0x1ae6c1(%rip), %rsi ; "containsobject:" 0x102c6c0b7: movq %r14, %rdx 0x102c6c0ba: callq *0x14a378(%rip) ; (void *)0x0000000104945000: objc_msgsend 0x102c6c0c0: movb %al, 0x1c001b(%rip) ; currentlocalerequiresunabbrevatedmonthnames.usesfulllengthmonthnames 0x102c6c0c6: movb $0x1, 0x1c0013(%rip) ; __overlaycalendargeneration + 7 0x102c6c0cd: movq %r14, %rdi 0x102c6c0d0: callq *0x14a36a(%rip) ; (void *)0x00000001049429b0: objc_release 0x102c6c0d6: movb 0x1c0005(%rip), %al ; currentlocalerequiresunabbrevatedmonthnames.usesfulllengthmonthnames 0x102c6c0dc: movq (%r15), %rcx 0x102c6c0df: cmpq -0x20(%rbp), %rcx 0x102c6c0e3: jne 0x102c6c0f3 ; currentlocalerequiresunabbrevatedmonthnames + 556 0x102c6c0e5: addq $0xb8, %rsp 0x102c6c0ec: popq %rbx 0x102c6c0ed: popq %r14 0x102c6c0ef: popq %r15 0x102c6c0f1: popq %rbp 0x102c6c0f2: retq 0x102c6c0f3: callq 0x102d29a1c ; symbol stub for: __stack_chk_fail

as can see, creates array of locales require unabbreviated month names. compares if current locale 1 of these locales.

hardcoded in code.

for abbreviated months, uses lll format (as seen in eventkitui`calstringformonth), , unabbreviated months, uses llll format (as seen in eventkitui`callongstringformonth).

cheers

ios objective-c nsdateformatter nslocale