如何检查bevy Rust的双击
新的是Bevy，需要在我的游戏中实现双击系统，这就是我尝试的。我遇到了一些与包含瞬间的局部变量有关的错误。我已经正确进口了即时板条箱，但不确定Bevy中还需要什么才能使本地VAR工作。
pub fn double_click(
mouse_button_input: Res<Input<MouseButton>>,
mut double_click_time: Local<Instant>,
) {
if mouse_button_input.just_pressed(MouseButton::Left) {
double_click_time = Instant::now();
}
println!("Time: {}", double_click_time.elapsed().as_secs());
}
我遇到的一个错误是在instant :: now（）;上，也是
expected struct `bevy::prelude::Local<'_, Instant, >`
found struct `Instant
添加系统的位置，
the trait bound `for<'r, 's> fn(bevy::prelude::Res<'r, bevy::prelude::Input<bevy::prelude::MouseButton>>, bevy::prelude::Local<'s, Instant>) {inventory::double_click}: IntoSystem<(), (), _>` is not satisfied
如果有另一种检测双击的方法，也会给出错误，这也有效！
New to bevy and need to implement a double click system into my game and this is what I tried. I got a couple errors specifically relating to the local variable containing Instant. I have properly imported the instant crate but am not sure what else is needed in bevy to make a local var work.
pub fn double_click(
mouse_button_input: Res<Input<MouseButton>>,
mut double_click_time: Local<Instant>,
) {
if mouse_button_input.just_pressed(MouseButton::Left) {
double_click_time = Instant::now();
}
println!("Time: {}", double_click_time.elapsed().as_secs());
}
One error I am getting is at the Instant::now(); and it is
expected struct `bevy::prelude::Local<'_, Instant, >`
found struct `Instant
Also where the system is added it gives error
the trait bound `for<'r, 's> fn(bevy::prelude::Res<'r, bevy::prelude::Input<bevy::prelude::MouseButton>>, bevy::prelude::Local<'s, Instant>) {inventory::double_click}: IntoSystem<(), (), _>` is not satisfied
If there is another way to detect a double click, that works too!
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基于您的错误和
local的文档（说它实现deref和derefmut），您只需要分配给local的 cottents，这应该解决您的编译错误：我不知道Bevy，所以我不知道这实际上是处理双击的最佳方法。
Based on your error and the docs for
Local(which say that it implementsDerefandDerefMut), you just need to assign to the contents of theLocal, and that should fix your compile error:I don't know Bevy, so I don't know if this is actually the best way to handle double clicks.
谢谢，这奏效了，但我换句话说，我只是将双击超时施加到用于其他相关事物的全局结构中。
Thanks, that worked but I figured out another way, I just implememnted the double click timeout into a global struct used for a couple other related things.