iOS时间类型转换和各种数据类型进行转换
这次分享一些数据类型还有时间类型的各种转换方法，有详细注释，话不多说，直接上代码
/** * 时间转换部分 * //从1970年开始到现在经过了多少秒 -(NSString *)getTimeSp { NSString *time; NSDate *fromdate=[NSDate date]; time = [NSString stringWithFormat:@"%f",[fromdate timeIntervalSince1970]]; return time; } //将时间戳转换成NSDate,转换的时间我也不知道是哪国时间,应该是格林尼治时间 -(NSDate *)changeSpToTime:(NSString*)spString { NSDate *confromTimesp = [NSDate dateWithTimeIntervalSince1970:[spString intValue]]; NSLog(@"%@",confromTimesp); return confromTimesp; } //将时间戳转换成NSDate,加上时区偏移。这个转换之后是北京时间 -(NSDate*)zoneChange:(NSString*)spString { NSDate *confromTimesp = [NSDate dateWithTimeIntervalSince1970:[spString intValue]]; NSTimeZone *zone = [NSTimeZone systemTimeZone]; NSInteger interval = [zone secondsFromGMTForDate:confromTimesp]; NSDate *localeDate = [confromTimesp dateByAddingTimeInterval: interval]; NSLog(@"%@",localeDate); return localeDate; } //比较给定NSDate与当前时间的时间差，返回相差的秒数 -(long)timeDifference:(NSDate *)date { NSDate *localeDate = [NSDate date]; long difference =fabs([localeDate timeIntervalSinceDate:date]); return difference; } //将NSDate按yyyy-MM-dd HH:mm:ss格式时间输出 -(NSString*)nsdateToString:(NSDate *)date { NSDateFormatter *dateFormat=[[NSDateFormatter alloc]init]; [dateFormat setDateFormat:@"yyyy-MM-dd HH:mm:ss"]; NSString* string=[dateFormat stringFromDate:date]; NSLog(@"%@",string); return string; } //将yyyy-MM-dd HH:mm:ss格式时间转换成时间戳 -(long)changeTimeToTimeSp:(NSString *)timeStr { long time; NSDateFormatter *format=[[NSDateFormatter alloc] init]; [format setDateFormat:@"yyyy-MM-dd HH:mm:ss"]; NSDate *fromdate=[format dateFromString:timeStr]; time= (long)[fromdate timeIntervalSince1970]; NSLog(@"%ld",time); return time; } //获取当前系统的yyyy-MM-dd HH:mm:ss格式时间 -(NSString *)getTime { NSDate *fromdate=[NSDate date]; NSDateFormatter *dateFormat=[[NSDateFormatter alloc]init]; [dateFormat setDateFormat:@"yyyy-MM-dd HH:mm:ss"]; NSString* string=[dateFormat stringFromDate:fromdate]; return string; } //将当前时间转化为年月日格式 -(NSString *)changeDate { NSDate *date = [NSDate date]; NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar]; NSInteger unitFlags = NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit | NSWeekdayCalendarUnit | NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit; NSDateComponents *comps = [calendar components:unitFlags fromDate:date]; NSInteger year = [comps year]; NSInteger month = [comps month]; NSInteger day = [comps day]; NSInteger hour = [comps hour]; NSInteger min = [comps minute]; NSInteger sec = [comps second]; NSString *string = [NSString stringWithFormat:@"%d年%d月%d日%d时%d分%d秒",year,month,day,hour,min,sec]; NSLog(@"%@",string); return string; } */ //发送数据时,16进制数－>Byte数组->NSData,加上校验码部分 -(NSData *)hexToByteToNSData:(NSString *)str { int j=0; Byte bytes[[str length]/2]; ////Byte数组即字节数组,类似于C语言的char[],每个汉字占两个字节，每个数字或者标点、字母占一个字节 for(int i=0;i<[str length];i++) { /** * 在iphone/mac开发中，unichar是两字节长的char，代表unicode的一个字符。 * 两个单引号只能用于char。可以采用直接写文字编码的方式来初始化。采用下面方法可以解决多字符问题 */ int int_ch; ///两位16进制数转化后的10进制数 unichar hex_char1 = [str characterAtIndex:i]; ////两位16进制数中的第一位(高位*16) int int_ch1; if(hex_char1 >= '0' && hex_char1 <='9') { int_ch1 = (hex_char1-48)*16; //// 0 的Ascll - 48 } else if(hex_char1 >= 'A' && hex_char1 <='F') { int_ch1 = (hex_char1-55)*16; //// A 的Ascll - 65 } else { int_ch1 = (hex_char1-87)*16; //// a 的Ascll - 97 } i++; unichar hex_char2 = [str characterAtIndex:i]; ///两位16进制数中的第二位(低位) int int_ch2; if(hex_char2 >= '0' && hex_char2 <='9') { int_ch2 = (hex_char2-48); //// 0 的Ascll - 48 } else if(hex_char2 >= 'A' && hex_char2 <='F') { int_ch2 = hex_char2-55; //// A 的Ascll - 65 } else { int_ch2 = hex_char2-87; //// a 的Ascll - 97 } int_ch = int_ch1+int_ch2; bytes[j] = int_ch; ///将转化后的数放入Byte数组里 // if (j==[str length]/2-2) { // int k=2; // int_ch=bytes[0]^bytes[1]; // while (k // int_ch=int_ch^bytes[k]; // k++; // } // bytes[j] = int_ch; // } j++; } NSData *newData = [[NSData alloc] initWithBytes:bytes length:[str length]/2 ]; NSLog(@"%@",newData); return newData; } //接收数据时,NSData－>Byte数组->16进制数 -(NSString *)NSDataToByteTohex:(NSData *)data { Byte *bytes = (Byte *)[data bytes]; NSString *hexStr=@""; for(int i=0;i<[data length];i++) { NSString *newHexStr = [NSString stringWithFormat:@"%x",bytes[i]&0xff];///16进制数,与 0xff 做 & 运算会将 byte 值变成 int 类型的值，也将 -128～0 间的负值都转成正值了。 if([newHexStr length]==1) { hexStr = [NSString stringWithFormat:@"%@0%@",hexStr,newHexStr]; } else { hexStr = [NSString stringWithFormat:@"%@%@",hexStr,newHexStr]; } } NSLog(@"hexStr:%@",hexStr); return hexStr; } //将汉字字符串转换成16进制字符串 -(NSString *)chineseToHex:(NSString*)chineseStr { NSStringEncoding encodingGB18030= CFStringConvertEncodingToNSStringEncoding(kCFStringEncodingGB_18030_2000); NSData *responseData =[chineseStr dataUsingEncoding:encodingGB18030 ]; NSString *string=[self NSDataToByteTohex:responseData]; NSLog(@"%@",string); return string; } //将汉字字符串转换成UTF8字符串 -(NSString *)chineseToUTf8Str:(NSString*)chineseStr { NSStringEncoding encodingUTF8 = NSUTF8StringEncoding; NSData *responseData2 =[chineseStr dataUsingEncoding:encodingUTF8 ]; NSString *string=[self NSDataToByteTohex:responseData2]; return string; } //将十六进制字符串转换成汉字 -(NSString*)changeLanguage:(NSString*)chinese { NSString *strResult; NSLog(@"chinese:%@",chinese); if (chinese.length%2==0) { //第二次转换 NSData *newData = [self hexToByteToNSData:chinese]; unsigned long encode = CFStringConvertEncodingToNSStringEncoding(kCFStringEncodingGB_18030_2000); strResult = [[NSString alloc] initWithData:newData encoding:encode]; NSLog(@"strResult:%@",strResult); } else { NSString *strResult = @"已假定是汉字的转换，所传字符串的长度必须是4的倍数!"; NSLog(@"%@",strResult); return NULL; } return strResult; } /////////////GBK,汉字，GB2312,ASCII码，UTF8,UTF16 //UTF8字符串转换成汉字 -(NSString*)changeLanguageUTF8:(NSString*)chinese { NSString *strResult; NSData *data=[self hexToByteToNSData:chinese]; strResult=[[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding]; return strResult; } //将十进制数转换成十六进制 -(NSString *)ToHex:(int)tmpid { NSString *nLetterValue; NSString *str =@""; long long int ttmpig; for (int i = 0; i<9; i++) { ttmpig=tmpid%16; tmpid=tmpid/16; switch (ttmpig) { case 10: nLetterValue =@"A";break; case 11: nLetterValue =@"B";break; case 12: nLetterValue =@"C";break; case 13: nLetterValue =@"D";break; case 14: nLetterValue =@"E";break; case 15: nLetterValue =@"F";break; default:nLetterValue=[[NSString alloc]initWithFormat:@"%lli",ttmpig]; } str = [nLetterValue stringByAppendingString:str]; if (tmpid == 0) { break; } } return str; } //Unicode转化为汉字 - (NSString *)replaceUnicode1:(NSString *)unicodeStr { NSString *tempStr1 = [unicodeStr stringByReplacingOccurrencesOfString:@"\\u" withString:@"\\U"]; NSString *tempStr2 = [tempStr1 stringByReplacingOccurrencesOfString:@"\"" withString:@"\\\""]; NSString *tempStr3 = [[@"\"" stringByAppendingString:tempStr2] stringByAppendingString:@"\""]; NSData *tempData = [tempStr3 dataUsingEncoding:NSUTF8StringEncoding]; NSString* returnStr = [NSPropertyListSerialization propertyListFromData:tempData mutabilityOption:NSPropertyListImmutable format:NULL errorDescription:NULL]; NSLog(@"%@",[returnStr stringByReplacingOccurrencesOfString:@"\\r\\n" withString:@"\n"]); return [returnStr stringByReplacingOccurrencesOfString:@"\\r\\n" withString:@"\n"]; } //iso8859－1 到 unicode编码转换 iso8859-1字符编码的一种 /* - (NSString *)changeISO88591StringToUnicodeString:(NSString *)iso88591String { NSMutableString *srcString = [[NSMutableString alloc]initWithString:iso88591String]; [srcString replaceOccurrencesOfString:@"&" withString:@"&" options:NSLiteralSearch range:NSMakeRange(0, [srcString length])]; [srcString replaceOccurrencesOfString:@"&#x" withString:@"" options:NSLiteralSearch range:NSMakeRange(0, [srcString length])]; NSMutableString *desString = [[NSMutableString alloc]init]; NSArray *arr = [srcString componentsSeparatedByString:@";"]; //将字符串切割成数组 for(int i=0;i<[arr count]-1;i++) { NSString *v = [arr objectAtIndex:i]; char *c = malloc(3); int value = [StringUtil changeHexStringToDecimal:v];//将二进制转化为十进制 c[1] = value &0x00FF; c[0] = value >>8 &0x00FF; c[2] = '\0'; [desString appendString:[NSString stringWithCString:c encoding:NSUnicodeStringEncoding]]; free(c); } return desString; } */