在字符串中找到你需要的位置

#import <Foundation/Foundation.h>

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

@autoreleasepool {

NSString *str=@"http://localhost:8099/test/user=admin&pwd=123";

NSRange range1=[str rangeOfString:@"user="];

NSRange range2=[str rangeOfString:@"&pwd"];

//找到位置

NSLog(@"%@",NSStringFromRange(range1));

NSUInteger useLen=range2.location-(range1.location+range1.length);

NSUInteger userLoc=range1.location+range1.length;

NSRange userrange={userLoc,useLen};

NSString *user=[str substringWithRange:userrange];

NSLog(@"%@",user);

}

return 0;

}