Question

你好我是iOS的新手，我试图循环我导入到Textview的txt文件，然后用“更好的词”替换“坏词”我有三个数组1持有转换的txt文件到一个数组。它们列出了它应该查找的坏词以及应该替换它们的好词列表。程序应该能够扫描文本并查找坏词，并根据坏词的值将其替换为更好的词。这是我到目前为止扫描文本时所拥有的。我正试图测试是否识别坏词，现在这不起作用。

- (IBAction)scanText:(id)sender

{

    NSString *contents = [NSString stringWithContentsOfFile:textFile encoding:NSUTF8StringEncoding error:nil];


    NSArray *lines =  [contents componentsSeparatedByString:@" "];
    NSArray *badword = [NSArray arrayWithObjects: @"Objectivity",@"people",nil];
    NSArray *goodWord = [NSArray arrayWithObjects:@"Default", @"Creepers"];



            for (NSString* bad in badword)

                if ([lines containsObject: bad])
                {
                    self.textView.text = [textFile stringByReplacingOccurrencesOfString:bad withString:@"##"];
                }


}

Answer 1

只需使用NSRegularExpression即可。请注意，我还没有考虑过如何使用正则表达式，但这应该适用于大多数情况。

编辑：我错过了更换部分。这是替换：

NSString *string = @"This is a paragraph with bad words that we don't want!!";
NSArray *badwords = @[@"bad", @"words"];
NSArray *betterwords = @[@"good", @"something"];

NSMutableString *pattern = [NSMutableString stringWithString:@"([^A-Za-z]?)("];
NSString *pipe = @"";
for (NSString *badWord in badwords)
{
    [pattern appendString:pipe];
    [pattern appendString:badWord];

    pipe = @"|";
}

[pattern appendString:@")([^A-Za-z]?)"];

NSMutableString *finalString = [string mutableCopy];

NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:pattern options:0 error:nil];
[regex enumerateMatchesInString:string
                        options:0
                          range:NSMakeRange(0, string.length)
                     usingBlock:^(NSTextCheckingResult *result, NSMatchingFlags flags, BOOL *stop) {

                         NSRange badrange = [result rangeAtIndex:2];
                         NSString *badword = [string substringWithRange:badrange];
                         NSInteger index = [badwords indexOfObject:badword];
                         NSString *betterword = betterwords[index];

                         NSInteger offset = finalString.length - string.length;
                         badrange.location += offset;

                         [finalString replaceCharactersInRange:badrange withString:betterword];
                     }];

NSLog(@"%@", finalString);

结果：

2014-06-18 [71719:60b] This is a paragraph with good something that we don't want!!

无论如何，我并不是真的想解决正则表达式问题，而是如何解决这个问题的Objective-C问题。

如何循环文本文件，然后在iOS中替换坏词

1 个答案: