ios 如何在swift中从另一个类调用另一个方法？
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How to call another method from another class in swift?
提问by zbz.lvlv
mainController = (ViewController *)self.presentingViewController;
mainController.pressureUnit = _pressureSettings.selectedSegmentIndex;
This is how I will do it in Objective C. How do I do this in swift?
这就是我在 Objective C 中的做法。我如何快速做到这一点？
回答by Steve Rosenberg
otherClass().methodFromOtherClass() is the syntax for swift
otherClass().methodFromOtherClass() 是 swift 的语法
If you have to pass a property with an external name it might be:
如果您必须传递具有外部名称的属性，它可能是：
otherClass().methodFromOtherClass(propertyName: stringName) //example of passing a string
otherClass().methodFromOtherClass(propertyName: stringName) //传递字符串的例子
To call the method to do something, if it is returning a result of a method:
调用方法做某事，如果它返回一个方法的结果：
let returnValue = otherClass().methodFromOtherClass(propertyName: stringName)
让 returnValue = otherClass().methodFromOtherClass(propertyName: stringName)
Example of accessing a property or a function
访问属性或函数的示例
class CarFactory {
var name = ""
var color = ""
var horsepower = 0
var automaticOption = false
func description() {
println("My \(name) is \(color) and has \(horsepower) horsepowers")
}
}
var myCar = CarFactory()
myFirstCar.name = "Mustang"
myCar.color = "Red"
myCar.horsepower = 200 myCar.automaticOption = true
myFirstCar.description() // $: "My Mustang is Red and has 200 horsepowers and is Automatic"
Excerpt From: Apple Inc. “The Swift Programming Language.” iBooks.
摘自：Apple Inc. “The Swift Programming Language”。电子书。
Here you just call the method but not a new instance of the class.
在这里，您只调用方法而不是类的新实例。
class SomeClass {
class func someTypeMethod() {
// type method implementation goes here
}
}
SomeClass.someTypeMethod()
