NSString的常用分类
2016-10-10 本文已影响577人
minjing_lin
工作中，为了方便，我们经常会对一些类进行扩展，新建一些分类。。。
以下是我在工作中整理的一套自己的NSString的Category，分享给大家，如喜欢，请留言支持以下。
也欢迎大家持续补充，我会整理一下，让更多的人看到。。。
- 正则匹配电话号码
-(BOOL)isVAlidPhoneNumber
{
NSString *regex = @"^(13|15|17|18|14)\\d{9}$";
NSPredicate * pred = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex];
BOOL isMatch =[pred evaluateWithObject:self];
return isMatch;
}
- 正则匹配邮箱
-(BOOL)isValidEmail
{
NSString *regex = @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}";
NSPredicate *emailTestPredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", regex];
return [emailTestPredicate evaluateWithObject:self];
}
- 正则匹配URL地址
-(BOOL)isValidUrl
{
NSString *regex =@"[a-zA-z]+://[^\\s]*";
NSPredicate *urlTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex];
return [urlTest evaluateWithObject:self];
}
- 判断字符串是否以某个字符串开头
-(BOOL)isBeginsWith:(NSString *)string
{
return ([self hasPrefix:string]) ? YES : NO;
}
- 判断字符串是否以某个字符串结尾
-(BOOL)isEndssWith:(NSString *)string
{
return ([self hasSuffix:string]) ? YES : NO;
}
- 判断字符串是否包含某个字符串
-(BOOL)containsString:(NSString *)subString
{
return ([self rangeOfString:subString].location == NSNotFound) ? NO : YES;
}
- 新字符串替换老字符串
-(NSString *)replaceCharcter:(NSString *)olderChar withCharcter:(NSString *)newerChar
{
return [self stringByReplacingOccurrencesOfString:olderChar withString:newerChar];
}
- 截取字符串（字符串都是从第0个字符开始数的哦~）
-(NSString*)getSubstringFrom:(NSInteger)begin to:(NSInteger)end
{
NSRange r;
r.location = begin;
r.length = end - begin;
return [self substringWithRange:r];
}
- 添加字符串
-(NSString *)addString:(NSString *)string
{
if(!string || string.length == 0)
return self;
return [self stringByAppendingString:string];
}
- 从主字符串中移除某个字符串
-(NSString *)removeSubString:(NSString *)subString
{
if ([self containsString:subString])
{
NSRange range = [self rangeOfString:subString];
return [self stringByReplacingCharactersInRange:range withString:@""];
}
return self;
}
- 去掉字符串中的空格
-(NSString *)removeWhiteSpacesFromString
{
NSString *trimmedString = [self stringByTrimmingCharactersInSet:
[NSCharacterSet whitespaceAndNewlineCharacterSet]];
return trimmedString;
}
- 判断字符串是否只包含字母-1
-(BOOL)containsOnlyLetters
{
NSCharacterSet *letterCharacterset = [[NSCharacterSet letterCharacterSet] invertedSet];
return ([self rangeOfCharacterFromSet:letterCharacterset].location == NSNotFound);
}
- 判断字符串是否只包含字母-2（正则）
-(BOOL)isLetter {
NSString *regEx = @"^[A-Za-z]+$";
NSPredicate *pred = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", regEx];
return [pred evaluateWithObject:self];
}
- 判断字符串是否只包含数字-1
-(BOOL)containsOnlyNumbers
{
NSCharacterSet *numbersCharacterSet = [[NSCharacterSet characterSetWithCharactersInString:@"0123456789"] invertedSet];
return ([self rangeOfCharacterFromSet:numbersCharacterSet].location == NSNotFound);
}
- 判断字符串是否只包含数字-2（正则）
-(BOOL)isNumbers {
NSString *regEx = @"^-?\\d+.?\\d?";
NSPredicate *pred= [NSPredicate predicateWithFormat:@"SELF MATCHES %@", regEx];
return [pred evaluateWithObject:self];
}
- 判断字符串是否只包含数字和字母
-(BOOL)containsOnlyNumbersAndLetters
{
NSCharacterSet *numAndLetterCharSet = [[NSCharacterSet alphanumericCharacterSet] invertedSet];
return ([self rangeOfCharacterFromSet:numAndLetterCharSet].location == NSNotFound);
}
- 由字母或数字组成 6-18位密码字符串（正则）
-(BOOL)isPassword {
NSString * regex = @"^[A-Za-z0-9_]{6,18}$";
NSPredicate *pred = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", regex];
return [pred evaluateWithObject:self];
}
- 判断数组中是否包含某个字符串
-(BOOL)isInThisarray:(NSArray*)array
{
for(NSString *string in array) {
if([self isEqualToString:string]) {
return YES;
}
}
return NO;
}
- 字符串转Data
-(NSData *)convertToData
{
return [self dataUsingEncoding:NSUTF8StringEncoding];
}
- Data转字符转
+(NSString *)getStringFromData:(NSData *)data
{ return [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
}
- 获取系统版本号
+(NSString *)getMyApplicationVersion
{
NSDictionary *info = [[NSBundle mainBundle] infoDictionary];
NSString *shortVersion = [info objectForKey:@"CFBundleShortVersionString"];
return [NSString stringWithFormat:@"%@", shortVersion];
// NSString *bundleVersion = [info objectForKey:@"CFBundleVersion"]; 测试字段号
// NSString *name = [info objectForKey:@"CFBundleDisplayName"]; app 名字
}
- 字符串编码
-(NSString*)EncodingWithUTF8
{
NSString *urlStrl = [self stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
return urlStrl;
}
- 获取当前时间
+(NSString*)getCurrentTimeString
{
//获取系统当前时间
NSDate *currentDate = [NSDate date];
//用于格式化NSDate对象
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
//设置格式：zzz表示时区
[dateFormatter setDateFormat:@"HH:mm:ss"];
//NSDate转NSString
NSString *currentDateString = [dateFormatter stringFromDate:currentDate];
//输出currentDateString
return currentDateString;
}
- 通知字符串长度 （文字 2个字节 字母：1个字节）
// 统计ASCII和Unicode混合文本长度
-(NSUInteger) unicodeLengthOfString {
NSUInteger asciiLength = 0;
for (NSUInteger i = 0; i < self.length; i++) {
unichar uc = [self characterAtIndex: i];
asciiLength += isascii(uc) ? 1 : 2;
}
NSUInteger unicodeLength = asciiLength / 2;
if(asciiLength % 2) {
unicodeLength++;
}
return unicodeLength;
}
- 计算属性字符文本占用的宽高
/**
* 计算属性字符文本占用的宽高
* @param font 显示的字体
* @param maxSize 最大的显示范围
* @param lineSpacing 行间距
* @return 占用的宽高
*/
-(CGSize)attrStrSizeWithFont:(UIFont *)font andmaxSize:(CGSize)maxSize lineSpacing:(CGFloat)lineSpacing{
NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
[paragraphStyle setLineSpacing:lineSpacing];
NSDictionary *dict = @{NSFontAttributeName: font,
NSParagraphStyleAttributeName: paragraphStyle};
CGSize sizeToFit = [self boundingRectWithSize:maxSize // 用于计算文本绘制时占据的矩形块
options:NSStringDrawingTruncatesLastVisibleLine |NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading // 文本绘制时的附加选项
attributes:dict // 文字的属性
context:nil].size; // context上下文。包括一些信息，例如如何调整字间距以及缩放。该对象包含的信息将用于文本绘制。该参数可为nil
return sizeToFit;
}
- 时间戳转时间
-(NSDate *)dateValueWithMillisecondsSince1970 {
return [NSDate dateWithTimeIntervalSince1970:[self doubleValue] / 1000];
}
