Objective c 如何在'&燃气轮机'；在目标C的空间之后呢？

以下是一个例子：

，我想删除

thsisjijdsnjdnjsd

如何检测

前面和空格

后面的字符串，并在目标C中将其修剪掉？另外，请提醒我，我不知道

aNodeName

或

thsisjijdsnjdnjsd

，因为数据可能会变成这样：

---

，我需要删除

zxzxxzxzxz

基本上你有两个选择

---

完整的基于命令行的示例

#import <Foundation/Foundation.h>

int main(int argc, const char * argv[])
{

    @autoreleasepool {
        NSString *string = @"<aNodee thsisjijdsnjdnjsd> ";
        NSError *error;
        NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@"<([a-zA-z]+)( .*)>" options:NSRegularExpressionCaseInsensitive
                                                                                 error:&error];
        NSArray *matches = [regex matchesInString:string options:0 range:NSMakeRange(0, [string length])];
        [matches enumerateObjectsUsingBlock:^(NSTextCheckingResult *result, NSUInteger idx, BOOL *stop) {
            NSString* nodeName = [string substringWithRange:[result rangeAtIndex:1]];
            NSString* value = [string substringWithRange:[result rangeAtIndex:2]];
            NSLog(@"Regex approach: %@ %@",nodeName, value);

            NSLog(@"Regex approach: %@", [string stringByReplacingOccurrencesOfString:value withString:@""]);
        }];




        NSScanner *scanner = [NSScanner scannerWithString:string];
        BOOL recordingValue = NO;

        NSMutableString *valueString = [@"" mutableCopy];
        [scanner setScanLocation:0];
        while (![scanner isAtEnd]) {

            NSString *charAtlocation = [string substringWithRange:NSMakeRange([scanner scanLocation], 1)];
            if ([charAtlocation isEqualToString:@" "]){
                recordingValue = YES;
                [valueString appendString:@" "];
            } else{
                if ([charAtlocation isEqualToString:@">"]){
                    recordingValue = NO;
                } else if (recordingValue) {
                    [valueString appendString:charAtlocation];
                }
            }
            [scanner setScanLocation:[scanner scanLocation]+1];
        } ;


        NSLog(@"Scanner approach: %@", valueString);
        NSLog(@"Scanner approach: %@", [string stringByReplacingOccurrencesOfString:valueString withString:@""]);
    }
    return 0;
}

#导入
int main（int argc，const char*argv[]
{
@自动释放池{
NSString*字符串=@“”；
n错误*错误；
NSRegularExpression*regex=[NSRegularExpression regular expression with pattern:@”选项：NSRegularExpression不区分大小写
错误：&错误]；
NSArray*matches=[regex matchesisnstring:string选项：0范围：NSMakeRange（0，[string length]）；
[匹配enumerateObjectsUsingBlock:^（NSTextCheckInResult*结果，NSUInteger idx，BOOL*停止）{
NSString*nodeName=[string substringWithRange:[结果范围索引：1]]；
NSString*值=[string substringWithRange:[结果范围索引：2]]；
NSLog（@“正则表达式方法：%@%@”，节点名称，值）；
NSLog（@“Regex方法：%@，[string stringByReplacingOccurrencesOfString:value with string:@“]）；
}];
NSScanner*scanner=[NSScanner scannerWithString:string]；
BOOL记录值=否；
NSMutableString*valueString=[@”“mutableCopy]；
[扫描仪设置扫描位置：0]；
而（！[scanner isattend]）{
NSString*charAtlocation=[string substringWithRange:NSMakeRange（[scanner scanLocation]，1）]；
if（[CharacterLocation isEqualToString:@”“）{
记录值=是；
[valueString appendString:@”“；
}否则{
if（[CharacterLocation IsequalString:@“>”]））{
记录值=否；
}else if（记录值）{
[valueString appendString:CharacterLocation]；
}
}
[扫描仪设置扫描位置：[扫描仪扫描位置]+1]；
} ;
NSLog（@“扫描仪方法：%@”，valueString）；
NSLog（@“扫描程序方法：%@，[string stringByReplacingOccurrencesOfString:valueString with string:@”“]）；
}
返回0；
}

输出：

Regex approach: aNodee  thsisjijdsnjdnjsd
Regex approach: <aNodee> 
Scanner approach:  thsisjijdsnjdnjsd
Scanner approach: <aNodee>

Regex方法：aNodee-thsisjijdsnjdnjsd
正则表达式方法：
扫描仪方法：thsisjijdsnjdnjsd
扫描仪方法：

更新了问题，我不知道我知道

aNodeName

我的正则表达式将为您提供节点名称和其他字符串添加基于nsscanner的示例-相信我this@KateGregory-我们不知道这是否用于html解析。但请注意，我在回答中添加了您作为警告提供的链接，以防它用于html解析。

#import <Foundation/Foundation.h>

int main(int argc, const char * argv[])
{

    @autoreleasepool {
        NSString *string = @"<aNodee thsisjijdsnjdnjsd> ";
        NSError *error;
        NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@"<([a-zA-z]+)( .*)>" options:NSRegularExpressionCaseInsensitive
                                                                                 error:&error];
        NSArray *matches = [regex matchesInString:string options:0 range:NSMakeRange(0, [string length])];
        [matches enumerateObjectsUsingBlock:^(NSTextCheckingResult *result, NSUInteger idx, BOOL *stop) {
            NSString* nodeName = [string substringWithRange:[result rangeAtIndex:1]];
            NSString* value = [string substringWithRange:[result rangeAtIndex:2]];
            NSLog(@"Regex approach: %@ %@",nodeName, value);

            NSLog(@"Regex approach: %@", [string stringByReplacingOccurrencesOfString:value withString:@""]);
        }];




        NSScanner *scanner = [NSScanner scannerWithString:string];
        BOOL recordingValue = NO;

        NSMutableString *valueString = [@"" mutableCopy];
        [scanner setScanLocation:0];
        while (![scanner isAtEnd]) {

            NSString *charAtlocation = [string substringWithRange:NSMakeRange([scanner scanLocation], 1)];
            if ([charAtlocation isEqualToString:@" "]){
                recordingValue = YES;
                [valueString appendString:@" "];
            } else{
                if ([charAtlocation isEqualToString:@">"]){
                    recordingValue = NO;
                } else if (recordingValue) {
                    [valueString appendString:charAtlocation];
                }
            }
            [scanner setScanLocation:[scanner scanLocation]+1];
        } ;


        NSLog(@"Scanner approach: %@", valueString);
        NSLog(@"Scanner approach: %@", [string stringByReplacingOccurrencesOfString:valueString withString:@""]);
    }
    return 0;
}

Regex approach: aNodee  thsisjijdsnjdnjsd
Regex approach: <aNodee> 
Scanner approach:  thsisjijdsnjdnjsd
Scanner approach: <aNodee>