标签: segment

I have segments and I want them to act as tabs. I tried using react-navigation onPress of each segment but it doesn't look nice.

I want the segments to stay fixed at the top and on clicking each one the content should change or call a specific component without reloading or noticing that the screen has changed.

<Segment>
  <Button first>
    <Text>Puppies</Text>
   </Button>
   <Button>
    <Text>Kittens</Text>
    </Button>
    <Button last active>
      <Text>Cubs</Text>
    </Button>
</Segment>
<Content>
  <Text>Awesome segment</Text>
</Content>

假设我有一个命令：

ffmpeg -f v4l2 -framerate 30 -video_size 640x480 -i /dev/video1 -c:v libx265 -x265-params bitrate=60:vbv-maxrate=60:vbv-bufsize=16:keyint=10:qcomp=0.5 -tune zerolatency -s 640x480 -preset ultrafast -pix_fmt yuv420p -r 5 -strict experimental -f somedate.ts

我想要做的是，30 分钟后 ffmpeg 开始将流写入新文件，文件名作为新文件的创建时间。

我得到了一些不一致的教学结果.
我不知道为什么会这样,所以我怀疑%es寄存器做的很奇怪,但我不确定.

请看下面的代码段.

08048400 <main>:
 8048400:   bf 10 84 04 08          mov    $HERE,%edi     
 8048405:   26 8b 07                mov    %es:(%edi),%eax  # <----- Result 1
 8048408:   bf 00 84 04 08          mov    $main,%edi
 804840d:   26 8b 07                mov    %es:(%edi),%eax  # <----- Result 2

08048410 <HERE>:
 8048410:   11 11                   adc    %edx,(%ecx)
 8048412:   11 11                   adc    %edx,(%ecx)

结果1:

%eax : 0x11111111 

看到这个结果,我猜想 mov %es:(%edi),%eax有点像mov (%edi),%eax.
因为0x11111111存储在HERE.

结果2:

%eax : 0x048410cc  

但是,结果2的结果完全不同.
我假设%eax是0x048410bf …

以下 Rust 代码，在 x86_64 平台编译。

#[macro_use]
extern crate lazy_static;

use std::collections::HashMap;

lazy_static! {
    static ref HASHMAP: HashMap<u32, &'static str> = {
        let mut m = HashMap::new();
        m.insert(0, "foo");
        m.insert(1, "bar");
        m.insert(2, "baz");
        m
    };
}

fn main() {
    // First access to `HASHMAP` initializes it
    println!("The entry for `0` is \"{}\".", HASHMAP.get(&0).unwrap());

    // Any further access to `HASHMAP` just returns the computed value
    println!("The entry for `1` is \"{}\".", HASHMAP.get(&1).unwrap());
}

我使用readelf命令查看符号表中HASHMAP变量的大小：

readelf -sW target/debug/deps/section_test-4d7d6a03c56fdde3.o

Symbol table '.symtab' contains 590 …