用法

        NSString *tmpspm =  [KNparseUrlParameter parseUrlParameter:@"spm" urlQueue:tmp.Url];

code

//
//  KNparseUrlParameter.m
//  moonDylib
//
//  Created by devzkn on 10/10/2018.
//  Copyright © 2018 devzkn. All rights reserved.
//

#import "KNparseUrlParameter.h"

@implementation KNparseUrlParameter

//利用正则表达式解析URL
+ (NSString *)parseUrlParameter:(NSString *)key urlQueue:(NSString *)urlQueue
{
    if (!urlQueue || !key) {
        return nil;
    }
    
    NSError *error;
    NSString *regTags=[[NSString alloc] initWithFormat:@"(^|&|\\?)+%@=+([^&]*)(&|$)",key];
    NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:regTags
                                                                           options:NSRegularExpressionCaseInsensitive
                                                                             error:&error];
    
    // 执行匹配的过程
    NSArray *matches = [regex matchesInString:urlQueue
                                      options:0
                                        range:NSMakeRange(0, [urlQueue length])];
    for (NSTextCheckingResult *match in matches) {
        NSString *tagValue = [urlQueue substringWithRange:[match rangeAtIndex:2]];  // 分组2所对应的串
        return tagValue;
    }
    return nil;
}



@end

Parsing_URLs_with_regular_expressions

利用正则表达式解析URL

用法

code

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