Boolean that specifies whether the current thread blocks until after the specified selector is performed on the receiver on the main thread.
一个布尔值，指定是否阻塞当前线程直到指定选择器在主线程中执行完毕。
The main rotary selector contact is always operated before the resistance contact (21).
主旋转选择器接触件总在电阻接触件(21)之前动作。
When you are in a quiet location and the noise produced during film rewinding is disturbing. Set the main switch selector to L (lock) to turn off the power. Rewinding will be temporarily stopped.
当你在很安静的地方，倒片时产生的噪音会打扰您，可以把主选择开关调到“L”，使电源断开，此时卷片将暂时停止。
When you are in a quiet location and the noise produced during film rewinding is disturbing. Set the main switch selector to L (lock) to turn off the power. Rewinding will be temporarily stopped.
当你在很安静的地方，倒片时产生的噪音会打扰您，可以把主选择开关调到“L”，使电源断开，此时卷片将暂时停止。
应用推荐