NSString 方法收集

NSString学习

在iOS中 ��可以使用stringByTrimmingCharactersInSet函数过滤字符串中的特殊符号。
1、
首先自己定义一个NSCharacterSet, 包含需要去除的特殊符号
NSCharacterSet set1 = [NSCharacterSet characterSetWithCharactersInString:@"@／：；（）¥「」＂、[]{}#%-+=\|~＜＞$€^•'@#$%&*()+'""];

由于NSString中有全角符号和半角符号, 因此有些符号要包括全角和半角的

然后调用stringByTrimmingCharactersInSet

NSString *trimmedString1 = [string stringByTrimmingCharactersInSet:set1];

trimmedString1就是过滤后的字符串

2、去除空格
NSCharacterSet *set2 = [NSCharacterSet whitespaceAndNewlineCharacterSet]；
NSString *trimmedString2 = [string stringByTrimmingCharactersInSet:set2];
3、
字符串花样处理：NSCharacter​Set
4.去除字符串内任何字符
Remove Any Character

    NSString *str = @"430F7ABD-DB61-4247-B716-FCE34C0F56C6";
    
    // Create character set with specified characters
    NSMutableCharacterSet *characterSet =
    [NSMutableCharacterSet characterSetWithCharactersInString:@"0-"];
    [characterSet formUnionWithCharacterSet:[NSCharacterSet letterCharacterSet]];

    
    // Build array of components using specified characters as separtors
    NSArray *arrayOfComponents = [str componentsSeparatedByCharactersInSet:characterSet];
    
    // Create string from the array components
    NSString *strOutput = [arrayOfComponents componentsJoinedByString:@""];
    
    NSLog(@"New string: %@", strOutput);

#---成功去除了所有的 - 0 d
终端打印：43761424771634566