// [NSDate date],輸出是GMT時(shí)間(GMT(Greenwich Mean Time)代表格林尼治標(biāo)準(zhǔn)時(shí)間),如果想獲取當(dāng)前時(shí)間需要通過(guò)時(shí)間戳進(jìn)行轉(zhuǎn)換
NSDate *date = [NSDate date]; // 獲得時(shí)間對(duì)象
NSTimeZone *zone = [NSTimeZone systemTimeZone]; // 獲得系統(tǒng)的時(shí)區(qū)
NSTimeInterval time = [zone secondsFromGMTForDate:date];// 以秒為單位返回當(dāng)前時(shí)間與系統(tǒng)格林尼治時(shí)間的差
NSDate *nowDate = [date dateByAddingTimeInterval:time];// 然后把差的時(shí)間加上,就是當(dāng)前系統(tǒng)準(zhǔn)確的時(shí)間