NSString 字符串的截取和替换

xiaoxiao2026-04-13 9

-(void)test{ NSString *testStr=@"abcdefg"; //从字符串的指定位置2截取到字符串末尾 NSString *new1=[testStr substringFromIndex:2]; NSLog(@"**********new1 = %@",new1); //从字符串开头截取到字符串3的指定位置 NSString *new2=[testStr substringToIndex:3]; NSLog(@"**********new2 = %@",new2); //从字符串的指定位置1截取到指定长度3 NSRange range={1,3}; //NSRange range=NSMakeRange(1, 3); NSString *new3=[testStr substringWithRange:range]; NSLog(@"**********new3 = %@",new3); //将abcdefg中的abc替换为123 testStr=[testStr stringByReplacingOccurrencesOfString:@"abc" withString:@"123"]; NSLog(@"**********newStr = %@",testStr); //待处理的字符串 NSString *string = @" A B CD EFG\n MN\n"; //字符串替换，处理后的string1 ＝ @"ABCDEF\nMN\n"; NSString *string1 = [string stringByReplacingOccurrencesOfString:@" " withString:@""]; //去除两端空格(注意是两端),处理后的string2 ＝ @"A B CD EFG\n MN\n"; NSString *string2 = [string stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]]; //去除两端回车(注意是两端),处理后的string3 ＝ @" A B CD EFG\n MN"; NSString *string3 = [string stringByTrimmingCharactersInSet:[NSCharacterSet newlineCharacterSet]]; //去除两端空格和回车(注意是两端),处理后的string4 ＝ @"A B CD EFG\n MN"; NSString *string4 = [string stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]]; }

转载请注明原文地址: https://ju.6miu.com/read-1308796.html

最新回复(0)