使用开源库 Objective-C RegEx Categories 处理正则表达式

Objective-C RegEx Categories

https://github.com/bendytree/Objective-C-RegEx-Categories

使用说明:将 RegExCategories.h RegExCategories.m 文件拖入工程中引入头文件即可.

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//匹配电话号码(手机号以13， 15，18开头，八个 \d 数字字符)

BOOL isMatch = [@"15910514636" isMatch:RX(@"^((13[0-9])|(15[^4,\\D])|(18[0,0-9]))\\d{8}$")];
    NSLog(@"%d", isMatch);

//匹配邮箱

BOOL isMatch = [@"[e-mail]" isMatch:RX(@"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}")];
    NSLog(@"%d", isMatch);

//匹配用户名(用户名长度为6-20位之间,大小写字母或者数字均可)

BOOL isMatch = [@"705786230" isMatch:RX(@"^[A-Za-z0-9]{6,20}+$")];
    NSLog(@"%d", isMatch);

//匹配身份证号

BOOL isMatch = [@"42120919831025587X" isMatch:RX(@"^(\\d{14}|\\d{17})(\\d|[xX])$")];
    NSLog(@"%d", isMatch);

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//创建一个正则表达式
    Rx* rx = RX(@"\\d");
    Rx* rx = [Rx rx:@"\\d"];
    Rx* rx = [Rx rx:@"\\d" ignoreCase:YES];
    
    //判断字符串是否匹配
    BOOL isMatch = [@"2345" isMatch:RX(@"^\\d+$")];
    
    //获取匹配的字符串
    NSString* age = [@"My dog is 3." firstMatch:RX(@"\\d+")];
    
    //获取匹配的结果存储进数组
    NSArray* words = [@"Hey pal" match:RX(@"\\w+")];
    // words => @[ @"Hey", @"pal" ]
    
    //能获取详细信息的匹配
    RxMatch* match = [@"12.34, 56.78" firstMatchWithDetails:RX(@"\\d+([.]\\d+)")];
    // match.value => @"12.34"
    // match.range => NSRangeMake(0, 5);
    // match.original => @"12.34, 56.78";
    // match.groups => @[ RxMatchGroup, RxMatchGroup ];
    
    //使用模板来替换匹配的字符串
    NSString* result = [@"My dog is 12." replace:RX(@"\\d+") with:@"old"];
    // result => @"My dog is old."
    
    //使用block来替换
    NSString* result = [RX(@"\\w+") replace:@"hi bud" withBlock:^(NSString* match){
        return [NSString stringWithFormat:@"%i", match.length];
    }];
    // result => @"2 3"
    
    //获取详细匹配信息的block方式
    NSString* result = [RX(@"\\w+") replace:@"hi bud" withDetailsBlock:^(RxMatch* match){
        return [NSString stringWithFormat:@"%i", match.value.length];
    }];
    // result => @"2 3"

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总结:正则表达式可用来按照一定模式来实现匹配字符串,替换字符串等等强大的功能,详细使用说明请参考该开源框架的使用示例.

其他:使用谓词来处理正则表达式示例

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NSString *email = @"[e-mail]";
    NSString *regex = @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}";
    NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", regex];
    BOOL isValid = [predicate evaluateWithObject:email];

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