iOS 获取随机字符串

-(NSString *)getRandomStr
{
    char data[6];
    
    for (int x=0;x < 6;data[x++] = (char)('A' + (arc4random_uniform(26))));
    
    NSString *randomStr = [[NSString alloc] initWithBytes:data length:6 encoding:NSUTF8StringEncoding];


    NSString *string = [NSString stringWithFormat:@"%@",randomStr];


    DLog(@"获取随机字符串 %@",string);


    return string;
    
}