一个实用的NSString分类工具（二） —— 获取拼音大写首字母和转义等

版本记录

版本号 时间
V1.0 2017.12.16

前言

NSString是我们经常使用的一个类，但是苹果的API很多用起来不是那么方便，需要根据我们特殊需求进行个性化的改变和定制，接下来，我就写一个NSString分类工具，以后在使用的时候直接调用这个分类中的方法，可以实现很多小的功能，用起来也很方便。相关代码已经上传至GitHub - 刀客传奇。感兴趣的可以看我上面写的几篇。
1. 一个实用的NSString分类工具 （一）—— 玩转数字

获取拼音首字母

获取拼音的首字母，看着简单好像取第一个字符就可以，但是要考虑很多情况，比如说声调正好在首位怎么办？下面我们看一下代码。

//获取拼音的首字母

- (NSString *)jj_gainPinYinFirstCharacter;

//获取拼音的首字母

- (NSString *)jj_gainPinYinFirstCharacter
{
    //转成了可变字符串
    NSMutableString *str = [NSMutableString stringWithString:self];
    
    //先转换为带声调的拼音
    CFStringTransform((CFMutableStringRef)str,NULL, kCFStringTransformMandarinLatin,NO);
    
    //再转换为不带声调的拼音
    CFStringTransform((CFMutableStringRef)str,NULL, kCFStringTransformStripDiacritics,NO);
    
    //转化为大写拼音
    NSString *pinYin = [str capitalizedString];
    
    //获取并返回首字母
    return [pinYin substringToIndex:1];
}

下面看一下调用

//获取拼音首字母

- (void)gainPinYinFirstChracter
{
    NSString *str = @"womendejia";
    NSString *result = [str jj_gainPinYinFirstCharacter];
    NSLog(@"result = %@", result);
    
    NSString *str1 = @"ǎi";
    NSString *result1 = [str1 jj_gainPinYinFirstCharacter];
    NSLog(@"result1 = %@", result1);
}

看一下输出结果

2017-12-16 09:30:47.665652+0800 JJNSStringTool[902:17277] result = W
2017-12-16 09:30:47.669444+0800 JJNSStringTool[902:17277] result1 = A

另一种计算多行字符串占有的尺寸

还是先看代码。

//获取多行文字的宽高

- (CGSize)jj_sizeWithFont:(UIFont *)font andMaxSize:(CGSize)maxSzie;

//获取多行文字的宽高

- (CGSize)jj_sizeWithFont:(UIFont *)font andMaxSize:(CGSize)maxSzie
{
    if (![font isKindOfClass:[UIFont class]]) {
        font = [UIFont systemFontOfSize:13];
    }
    if (NSFontAttributeName == nil || font == nil) {
        return CGSizeZero;
    }
    NSDictionary *atte = @{NSFontAttributeName : font};
    return  [self boundingRectWithSize:maxSzie options:NSStringDrawingUsesLineFragmentOrigin attributes:atte context:nil].size;
}

下面我们就看一下调用

- (void)calculateMultiLineSize
{
    UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(100.0, 100.0, 250, 500)];
    label.backgroundColor = [UIColor blueColor];
    label.text = @"这是什么鬼👻☺这是什么鬼👻☺这是什么鬼👻☺这是什么鬼👻☺这是什么鬼👻☺这是什么鬼👻☺这是什么鬼👻☺这是什么鬼👻☺";
    label.numberOfLines = 0;
    [label sizeToFit];
    [self.view addSubview:label];
    
    CGSize size = [label.text jj_sizeWithFont:[UIFont systemFontOfSize:20.0] andMaxSize:CGSizeMake(250, MAXFLOAT)];
    NSLog(@"%lf --- %lf", size.width, size.height);
}

看一下输出结果

2017-12-16 09:45:28.169732+0800 JJNSStringTool[1091:27948] 242.660000 --- 143.203125

验证弱密码

还是先看代码

//密码太弱

- (BOOL)jj_isPasswordWeak;

//密码太弱

- (BOOL)jj_isPasswordWeak
{
    if ([self isEqualToString:@"112233"] ||
        [self isEqualToString:@"123123"] ||
        [self isEqualToString:@"123321"] ||
        [self isEqualToString:@"abcabc"] ||
        [self isEqualToString:@"abc123"] ||
        [self isEqualToString:@"a1b2c3"] ||
        [self isEqualToString:@"aaa111"] ||
        [self isEqualToString:@"123qwe"] ||
        [self isEqualToString:@"qweasd"] ||
        [self isEqualToString:@"admin"]  ||
        [self isEqualToString:@"password"] ||
        [self isEqualToString:@"p@ssword"] ||
        [self isEqualToString:@"passwd"] ||
        [self isEqualToString:@"iloveyou"] ||
        [self isEqualToString:@"5201314"]||
        [self isEqualToString:@"asdfghjkl"]||
        [self isEqualToString:@"qwerty"]) {
        return YES;
    }
    NSString *CT_NUM = @"^(0{6,16})|(1{6,16})|(2{6,16})|(3{6,16})|(4{6,16})|(5{6,16})|(6{6,16})|(7{6,16})|(8{6,16})|(9{6,16})|(a{6,16})|(b{6,16})|(c{6,16})|(d{6,16})|(e{6,16})|(f{6,16})|(g{6,16})|(h{6,16})|(i{6,16})|(j{6,16})|(k{6,16})|(l{6,16})|(m{6,16})|(n{6,16})|(o{6,16})|(p{6,16})|(q{6,16})|(r{6,16})|(s{6,16})|(t{6,16})|(u{6,16})|(v{6,16})|(w{6,16})|(x{6,16})|(y{6,16})|(z{6,16})|(A{6,16})|(B{6,16})|(C{6,16})|(D{6,16})|(E{6,16})|(F{6,16})|(G{6,16})|(H{6,16})|(I{6,16})|(J{6,16})|(K{6,16})|(L{6,16})|(M{6,16})|(N{6,16})|(O{6,16})|(P{6,16})|(Q{6,16})|(R{6,16})|(S{6,16})|(T{6,16})|(U{6,16})|(V{6,16})|(W{6,16})|(X{6,16})|(Y{6,16})|(Z{6,16})$";//
    NSPredicate *pred1 = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", CT_NUM];
    BOOL isMatch1 = [pred1 evaluateWithObject:self];
    if (isMatch1==YES) {
        return YES;
    }
    NSString *model = @"0123456789";
    NSString *alphe = @"abcdefghijklmnopqrstuvwxyz";
    NSString *alphe2 = @"ABCDEFGHIJKLMNOPQRSTUVWXYZ";
    if ([model rangeOfString:self].location != NSNotFound) {
        return YES;
    }
    
    if ([alphe rangeOfString:self].location != NSNotFound) {
        return YES;
    }
    
    if ([alphe2 rangeOfString:self].location != NSNotFound) {
        return YES;
    }
    return NO;
}

下面我们就调用一下

//密码太弱

- (void)evaluateWeakPassword
{
    NSString *str = @"123456";
    BOOL result = [str jj_isPasswordWeak];
    NSLog(@"result = %d", result);
    
    NSString *str1 = @"eoowehohowh";
    BOOL result1 = [str1 jj_isPasswordWeak];
    NSLog(@"result1 = %d", result1);
}

看输出结果

2017-12-16 09:53:52.298812+0800 JJNSStringTool[1268:33541] result = 1
2017-12-16 09:53:52.300740+0800 JJNSStringTool[1268:33541] result1 = 0

URL转义

这个大家很熟悉了，但是还是给大家列了出来。还是直接看代码。

//URL转义

- (NSURL *)jj_encodeURL;

//URL 转义

- (NSURL *)jj_encodeURL
{
    NSString *collectUrl = [self stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
    NSString *urlEncodeString = [collectUrl stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
    NSURL *url = [NSURL URLWithString:urlEncodeString];
    return url;
}

下面我们调用一下

// URL 转义

- (void)encodeURL
{
    NSString *str = @"http://www.baidu.com?a=我的家";
    NSURL *result = [str jj_encodeURL];
    NSLog(@"result = %@", result);
    
    NSString *str1 = @"http://www.baidu.com?a=b";
    NSURL *result1 = [str1 jj_encodeURL];
    NSLog(@"result1 = %@", result1);
}

看一下输出结果

2017-12-16 10:13:54.158231+0800 JJNSStringTool[1455:45285] result = http://www.baidu.com?a=%E6%88%91%E7%9A%84%E5%AE%B6
2017-12-16 10:13:54.158519+0800 JJNSStringTool[1455:45285] result1 = http://www.baidu.com?a=b

字符串的转义

先看一下代码

- (NSString *)jj_encodedString;

- (NSString *)jj_encodedString
{
    NSString *result = CFBridgingRelease(CFURLCreateStringByAddingPercentEscapes(kCFAllocatorDefault, (CFStringRef)self, NULL, CFSTR("!*'();:@&=+$,/?%#[]"), kCFStringEncodingUTF8));
    return result;
}

下面调用一下

- (void)encodeString
{
    NSString *str = @"womendejia";
    NSString *result = [str jj_encodedString];
    NSLog(@"result = %@", result);
    
    NSString *str1 = @"ode家";
    NSString *result1 = [str1 jj_encodedString];
    NSLog(@"result1 = %@", result1);
}

下面看输出结果

2017-12-16 10:22:32.906892+0800 JJNSStringTool[1570:49951] result = womendejia
2017-12-16 10:22:32.907132+0800 JJNSStringTool[1570:49951] result1 = ode%E5%AE%B6

字符串转义解码

下面我们就还原到转义前的字符串。

- (NSString *)jj_decodedString;

- (NSString *)jj_decodedString
{
    NSString *result = CFBridgingRelease(CFURLCreateStringByReplacingPercentEscapesUsingEncoding(kCFAllocatorDefault, (CFStringRef)self, CFSTR(""), kCFStringEncodingUTF8));
    return result;
}

下面我们就调用一下

- (void)decodeString
{
    NSString *str = @"womendejia";
    NSString *result = [str jj_decodedString];
    NSLog(@"result = %@", result);
    
    NSString *str1 = @"ode%E5%AE%B6";
    NSString *result1 = [str1 jj_decodedString];
    NSLog(@"result1 = %@", result1);
}

下面看输出结果

2017-12-16 10:34:50.994303+0800 JJNSStringTool[1726:56128] result = womendejia
2017-12-16 10:34:50.994607+0800 JJNSStringTool[1726:56128] result1 = ode家

后记

未完，待续~~~

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