从 NSString 中删除 http://

问题描述 投票:0回答:16

如何从

NSString
中删除某些文本,例如“http://”?它需要完全按照这个顺序。感谢您的帮助!

这是我正在使用的代码,但是 http:// 没有被删除。相反,它显示为 http://http://www.example.com。我应该怎么办?谢谢!

NSString *urlAddress = addressBar.text;
[urlAddress stringByReplacingOccurrencesOfString:@"http://" withString:@""];
urlAddress = [NSString stringWithFormat:@"http://%@", addressBar.text];
NSLog(@"The user requested this host name: %@", urlAddress);
iphone objective-c ios ipad nsstring
16个回答
19
投票

像这样吗?

NSString* stringWithoutHttp = [someString stringByReplacingOccurrencesOfString:@"http://" withString:@""];

(如果您只想删除开头的文本,请执行 jtbandes 所说的操作 - 上面的代码也将替换字符串中间出现的文本)


9
投票

这是一个处理 http 和 https 的解决方案:

    NSString *shortenedURL = url.absoluteURL;

    if ([shortenedURL hasPrefix:@"https://"]) shortenedURL = [shortenedURL substringFromIndex:8];
    if ([shortenedURL hasPrefix:@"http://"]) shortenedURL = [shortenedURL substringFromIndex:7];

6
投票
NSString *newString = [myString stringByReplacingOccurrencesOfString:@"http://"
                                                          withString:@""
                                                             options:NSAnchoredSearch // beginning of string
                                                               range:NSMakeRange(0, [myString length])]

3
投票

如果 http:// 位于字符串的开头,您可以使用

 NSString *newString  = [yourOriginalString subStringFromIndex:7];

或者按照 SVD 的建议

编辑:看到问题后编辑

更改此行

[urlAddress stringByReplacingOccurrencesOfString:@"http://" withString:@""];

urlAddress  = [urlAddress stringByReplacingOccurrencesOfString:@"http://" withString:@""];

2
投票

另一种方法是:

NSString *str = @"http//abc.com";  
NSArray *arr = [str componentSeparatedByString:@"//"];  
NSString *str1 = [arr objectAtIndex:0];       //   http  
NSString *str2 = [arr objectAtIndex:1];       //   abc.com

2
投票

由于该线程仍然处于活动状态并出现在我的搜索中,以从 URL(不是 NSString)中删除前缀...如果您从 URL 开始,则会有一行:

String(url.absoluteString.dropFirst((url.scheme?.count ?? -3) + 3))

1
投票

这是另一种选择;

NSMutableString *copiedUrl = [[urlAddress mutablecopy] autorelease];
[copiedUrl deleteCharactersInRange: [copiedUrl rangeOfString:@"http://"]];

1
投票

如果您希望修剪两侧并减少编写代码:

NSString *webAddress = @"http://www.google.co.nz";

// add prefixes you'd like to filter out here
NSArray *prefixes = [NSArray arrayWithObjects:@"https:", @"http:", @"//", @"/", nil];

for (NSString *prefix in prefixes)
    if([webAddress hasPrefix:prefix]) webAddress = [webAddress stringByReplacingOccurrencesOfString:prefix withString:@"" options:NSAnchoredSearch range:NSMakeRange(0, [webAddress length])];

// add suffixes you'd like to filter out here
NSArray *suffixes = [NSArray arrayWithObjects:@"/", nil];

for (NSString *suffix in suffixes)
    if([webAddress hasSuffix:suffix]) webAddress = [webAddress stringByReplacingOccurrencesOfString:suffix withString:@"" options:NSBackwardsSearch range:NSMakeRange(0, [webAddress length])];

此代码将从前面删除指定的前缀,并从后面删除指定的后缀(如尾部斜杠)。只需向前缀/后缀数组添加更多子字符串即可过滤更多内容。


1
投票

斯威夫特3

要替换所有出现的情况:

let newString = string.replacingOccurrences(of: "http://", with: "")

用于替换字符串开头的匹配项:

let newString = string.replacingOccurrences(of: "http://", with: "", options: .anchored)

1
投票

对于那些使用 swift 并已经到达这里的人。

extension String {

   func withoutHttpPrefix() -> String {
       var idx: String.Index?;
       if self.hasPrefix("http://www.") {
          idx = self.index(startIndex, offsetBy: 11)
       } else if hasPrefix("https://www.") {
           idx = self.index(startIndex, offsetBy: 12)
       } else if self.hasPrefix("http://") {
          idx = self.index(startIndex, offsetBy: 7)
       } else if hasPrefix("https://") {
           idx = self.index(startIndex, offsetBy: 8)
       }

       if idx != nil {
           return String(self[idx!...])
       }
       return self
   }
}

0
投票

+(NSString*)removeOpeningTag:(NSString*)inString tag:(NSString*)inTag {
    if ([inString length] == 0 || [inTag length] == 0) return inString;
    if ([inString length] < [inTag length]) {return inString;}
    NSRange tagRange= [inString rangeOfString:inTag];   
    if (tagRange.location == NSNotFound || tagRange.location != 0) return inString; 
    return [inString substringFromIndex:tagRange.length]; 
}

0
投票

NSString* newString = [string stringByReplacingOccurrencesOfString:@"http://" withString:@""];


0
投票

一种更通用的方法:

- (NSString*)removeURLSchemeFromStringURL:(NSString*)stringUrl {
    NSParameterAssert(stringUrl);
    static NSString* schemeDevider = @"://";

    NSScanner* scanner = [NSScanner scannerWithString:stringUrl];
    [scanner scanUpToString:schemeDevider intoString:nil];

    if (scanner.scanLocation <= stringUrl.length - schemeDevider.length) {
        NSInteger beginLocation = scanner.scanLocation + schemeDevider.length;
        stringUrl = [stringUrl substringWithRange:NSMakeRange(beginLocation, stringUrl.length - beginLocation)];
    }

    return stringUrl;
}

0
投票

大家好,有点晚了,但我有一个通用的方法 让我们说:

NSString *host = @"ssh://www.somewhere.com";
NSString *scheme = [[[NSURL URLWithString:host] scheme] stringByAppendingString:@"://"]; 
// This extract ssh and add :// so we get @"ssh://" note that this code handle any scheme http, https, ssh, ftp ....
NSString *stripHost = [host stringByReplacingOccurrencesOfString:scheme withString:@""]; 
// Result : stripHost = @"www.somewhere.com"

0
投票

这将删除任何方案,包括 http、https 等。

NSRange dividerRange = [str rangeOfString:@"://"];
NSString *newString = [str substringFromIndex:NSMaxRange(dividerRange)];

0
投票
extension String {    
   func removeHTTPPrefix() -> String {
       return self.components(separatedBy: "://").last ?? self
   }
}
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