123
2019-02-16 本文已影响1人
nbhhcty
varcar ="Benz"
let closure = {
print("I drive \(car)")
}
car ="Tesla"
closure()
不同情况输出结果不一样
classRunloopVc:UIViewController{
overridefuncviewDidLoad(){
super.viewDidLoad()
varcar ="Benz"
letclosure = { [car]in
print("I drive\(car)")
}
car ="Tesla"
closure()
}
}
输出结果1：I drive Benz
如果：
```classRunloopVc:UIViewController{
overridefuncviewDidLoad(){
super.viewDidLoad()
car ="Tesla"
closure()
}
}```
varcar ="Benz"
letclosure = { [car]in
print("I drive\(car)")
}
输出结果2：I drive Tesla
