iphone - 从 END 修剪字符串

Question

我想从字符串的末尾字符串字符串，是否有任何字符串的 api 函数只能从字符串的结尾删除空格和换行符。

我编写了手动代码来从字符串末尾搜索字符并删除空格和换行符，但这可能会减慢进程。

需要API函数..

提前致谢

Answer 1

试试这个可能对你有帮助

-(NSString *)removeEndSpaceFrom:(NSString *)strtoremove{
    NSUInteger location = 0;
    unichar charBuffer[[strtoremove length]];
    [strtoremove getCharacters:charBuffer];
    int i = 0;
    for ( i = [strtoremove length]; i >0; i--){
        if (![[NSCharacterSet whitespaceCharacterSet] characterIsMember:charBuffer[i - 1]]){
            break;
        }
    }
    return  [strtoremove substringWithRange:NSMakeRange(location, i  - location)];
}

和

 NSString *string = @"          this text has spaces before and after         ";
    NSString *trimmedString = [self removeEndSpaceFrom:string];
    NSLog(@"%@",trimmedString);