NSString *urlStr = [NSString stringWithFormat:@"%@://para1=value1¶2=value2", @"thirdParty"];
NSString *hString = [self paramValueOfUrl:urlStr withParam:@"para2"];
//以url形式的字符串中获取某一个值
- (NSString *)paramValueOfUrl:(NSString *)url withParam:(NSString *)param
{
NSError *error;
NSString *regTags=[[NSString alloc] initWithFormat:@"(^||\\?)+%@=+([^&]*)(&|$)",param];
NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:regTags
options:NSRegularExpressionCaseInsensitive
error:&error];
// 执行匹配的过程
NSArray *matches = [regex matchesInString:url
options:0
range:NSMakeRange(0, [url length])];
for (NSTextCheckingResult *match in matches) {
NSString *tagValue = [url substringWithRange:[match rangeAtIndex:2]]; // 分组2所对应的串
return tagValue;
}
return nil;
}
