[英]Can't figure out how to append to an array (within a struct) (Swift)
I'm completely stuck. 我完全被困住了。 I'm working on building an iOS app in Swift. 我正在使用Swift构建iOS应用。 I need to define an array of tools within a struct, but if I include any more than 4 items Xcode gets stuck indexing. 我需要在一个结构中定义一系列工具,但是如果我包含4个以上的项目,则Xcode会卡住索引。
Found the solution to that particular issue here: https://stackoverflow.com/a/27531394 . 在此处找到针对该特定问题的解决方案: https : //stackoverflow.com/a/27531394 。 I can't figure out how to append to the array, however. 但是,我不知道如何追加到数组。 When I attempt to do the code below, I get the following error: "Expected declaration". 当我尝试执行以下代码时,出现以下错误:“期望的声明”。 Any ideas? 有任何想法吗?
import Foundation
struct Toolkit {
var tools = [ [
"name": "Know Yourself to Lead Yourself",
"shape": "icon_knowyourself.pdf",
"image": "know_yourself_to_lead_yourself.pdf",
"backgroundColor": ["red": 215, "green": 34, "blue": 14, "alpha": 1.0]
],
[
"name": "The Core",
"shape": "icon_thecore.pdf",
"image": "the_core.pdf",
"backgroundColor": ["red": 185, "green": 34, "blue": 14, "alpha": 1.0]
],
[
"name": "5 Circles of Influence",
"shape": "icon_5circles.pdf",
"image": "5_circles_of_influence.pdf",
"backgroundColor": ["red": 185, "green": 34, "blue": 14, "alpha": 1.0]
],
[
"name": "Support Challenge Matrix",
"shape": "icon_supportchallenge.pdf",
"image": "support_challenge_matrix.pdf",
"backgroundColor": ["red": 205, "green": 34, "blue": 14, "alpha": 1.0]
]
]
tools.append([
"name": "Creating Healthy Culture",
"shape": "icon_healthyculture.pdf",
"image": "creating_healthy_culture.pdf",
"backgroundColor": ["red": 185, "green": 34, "blue": 14, "alpha": 1.0]
])
}
There are limitations on what kinds of operations you can perform while you're defining the interface for a struct or class. 在定义结构或类的接口时,可以执行哪些类型的操作存在限制。 You can do some basic initialization of values, but calling a method like append() isn't allowed. 您可以对值进行一些基本的初始化,但是不允许调用诸如append()之类的方法。 Here's a quick tweak to your code where I've moved the append into the init() method instead: 这是对您的代码的快速调整,在该代码中,我将附加内容移到了init()方法中:
struct Toolkit {
var tools = [ [
"name": "Know Yourself to Lead Yourself",
"shape": "icon_knowyourself.pdf",
"image": "know_yourself_to_lead_yourself.pdf",
"backgroundColor": ["red": 215, "green": 34, "blue": 14, "alpha": 1.0]
],
[
"name": "The Core",
"shape": "icon_thecore.pdf",
"image": "the_core.pdf",
"backgroundColor": ["red": 185, "green": 34, "blue": 14, "alpha": 1.0]
],
[
"name": "5 Circles of Influence",
"shape": "icon_5circles.pdf",
"image": "5_circles_of_influence.pdf",
"backgroundColor": ["red": 185, "green": 34, "blue": 14, "alpha": 1.0]
],
[
"name": "Support Challenge Matrix",
"shape": "icon_supportchallenge.pdf",
"image": "support_challenge_matrix.pdf",
"backgroundColor": ["red": 205, "green": 34, "blue": 14, "alpha": 1.0]
]
]
init() {
tools.append([
"name": "Creating Healthy Culture",
"shape": "icon_healthyculture.pdf",
"image": "creating_healthy_culture.pdf",
"backgroundColor": ["red": 185, "green": 34, "blue": 14, "alpha": 1.0]
])
}
}
let kit = Toolkit()
println(kit.tools)
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.