字符串处理 去除指定字符串两边空格 有个朋友问的 帮他写的 顺带分享给大家

#import "ViewController.h"

#define YOURSTR @"str"

@interface ViewController ()

@end

@implementation ViewController

• (void)viewDidLoad {

  [super viewDidLoad];

  NSString *str = @"去 掉 空 格 str 看 看";

  NSLog(@"处理前:%@",str);

  NSLog(@"处理后:%@",[self stringConductWithStr:str]);

}

• (NSString *)stringConductWithStr:(NSString *)str{

  NSMutableString *mulStr = [[NSMutableString alloc] initWithString:str];

  if ([str containsString:YOURSTR]) {

   NSRange range = [mulStr rangeOfString:YOURSTR];
   
   if (range.location >= 1 
   && [[mulStr substringWithRange:NSMakeRange(range.location - 1, 1)] isEqualToString:@" "] 
   && [[mulStr substringWithRange:NSMakeRange(range.location + range.length, 1)] isEqualToString:@" "]) {
   
        [mulStr replaceCharactersInRange:NSMakeRange(range.location - 1, range.length + 2) withString:YOURSTR];
        
    }
  

  }

  return [NSString stringWithFormat:@"%@",mulStr];

}

@end