在 : 之后和之前拆分字符串？

Question

我有一个像这样的长字符串：

je!tress:e?tu!tress:es?il!tress:e?nous!tress:ons?vous!tress:ez?ils!tress:ent?

我想拆分 : 之后和之前的字符串？ .所以我想把它放入数组中：

{e,es,e,ons,ez,en}

我知道我可以做到：

 NSArray *subStrings = [stringToChange componentsSeparatedByString:@":"];

但这还不够。请问我该怎么做？任何帮助将不胜感激！

Answer 1

使用 NSScanner 解析字符串，搜索 : 和 ? 标记。您可以丢弃不需要的文本并捕获您所做的部分（基于您找到的标签）并将它们添加到数组中。

Answer 2

试试这个，

  NSString *names = @"je!tress:e?tu!tress:es?il!tress:e?nous!tress:ons?vous!tress:ez?ils!tress:ent?";
NSArray *namesarray = [names componentsSeparatedByString:@":"];
NSMutableArray *desiredArray = [[NSMutableArray alloc] initWithCapacity:0];
[namesarray enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
NSRange rangeofsign = [(NSString*)obj rangeOfString:@"?"];
NSString *extractedName = [(NSString*)obj substringToIndex:rangeofsign.location];
[desiredArray addObject:extractedName];
 }];
NSLog(@"%@",desiredArray);

Answer 3

为了更简单，您可以尝试以下代码：

NSString *string = @"je!tress:e?tu!tress:es?il!tress:e?nous!tress:ons?vous!tress:ez?ils!tress:ent?";
NSArray *firstArray = [string componentsSeparatedByString:@":"];
NSMutableArray *finalArray = [[NSMutableArray alloc] init];
for (NSString *newString in firstArray) {
    NSArray *tempArray = [newString componentsSeparatedByString:@"?"];
    if ([tempArray count] > 1) {
        [finalArray addObject:[tempArray firstObject]];
    }
}
NSLog(@"%@",finalArray);

Answer 4

另一种选择是使用 NSRegularExpression class.

使用此模式：

\:([^\?]+)\?

示例代码：

NSString *sample  = @"je!tress:e?tu!tress:es?il!tress:e?nous!tress:ons?vous!tress:ez?ils!tress:ent?";
NSString *pattern = @"\:([^\?]+)\?";

NSError *error = NULL;
NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:pattern
                                                                       options:NSRegularExpressionCaseInsensitive
                                                                         error:&error];


NSArray *matches = [regex matchesInString:sample
                                  options:0
                                    range:NSMakeRange(0, [sample length])];
if(!error && [matches count] > 0) {
    for (NSTextCheckingResult *match in matches) {
        NSRange matchRange = [match range];
        NSLog(@"%@" ,[sample substringWithRange:matchRange]);
    }
}

输出：

2015-07-03 12:16:39.037 TestRegex[3479:48301] :e
2015-07-03 12:16:39.039 TestRegex[3479:48301] :es
2015-07-03 12:16:39.039 TestRegex[3479:48301] :e
2015-07-03 12:16:39.040 TestRegex[3479:48301] :ons
2015-07-03 12:16:39.040 TestRegex[3479:48301] :ez
2015-07-03 12:16:39.040 TestRegex[3479:48301] :ent

在 : 之后和之前拆分字符串？

Split string after : and before?

objective-c

nsstring

ios