liuchuo – 第24页 – 我不管，反正我最萌～

【iOS】Touch Drag Inside 和 Touch Drag Outside、Touch Drag Enter、Touch Drag Exit的区别

Touch Drag Inside：手指在控件窗口内拖动

Touch Drag Outside：手指在控件窗口外拖动

Touch Drag Enter：手指从控件窗口外部拖动到内部

Touch Drag Exit：手指从控件窗口内部拖动到外部

[依据] 来自Apple官方文档 UIControlEvents：

UIControlEventTouchDragInside：An event where a finger is dragged inside the bounds of the control.

UIControlEventTouchDragOutside：An event where a finger is dragged just outside the bounds of the control.

UIControlEventTouchDragEnter：An event where a finger is dragged into the bounds of the control.

UIControlEventTouchDragExit：An event where a finger is dragged from within a control to outside its bounds.

【iOS】Touch Up Inside 和 Touch Up Outside 的区别

Touch Up Inside：按下按钮，并且在按钮内部（inside）松手

Touch Up Outside：按下按钮，并且在按钮外部（outside）松手

[依据] 来自Apple官方文档 UIControlEvents：

UIControlEventTouchUpInside：A touch-up event in the control where the finger is inside the bounds of the control.

UIControlEventTouchUpOutside：A touch-up event in the control where the finger is outside the bounds of the control.

【note】编程范式（编程范型）的含义和种类，多范式编程语言

范型 / 范式 = 模式、方法
编程范式 / 编程范型 = 编程的模式、风格

编程范式主要包括：结构化编程、面向对象编程、过程式（程序式）编程、函数式编程（泛函编程）、指令式（命令式）编程、泛型编程、面向切面（面向侧面）编程

不同的编程语言会提倡不同的“编程范型”，一些语言是专门为某个特定的范型设计的（如Java是较纯粹的面向对象编程语言，C语言是过程式编程语言），而另一些语言支持多种范型（如C++、Python、Ruby、Swift），这种支持多种范型的编程语言就叫做多范式编程语言

常见的多范式编程语言：
C++：面向对象编程、程序式编程、泛型编程
Python：面向对象编程、指令式编程、函数式编程、程序式编程、面向切面编程
Ruby：面向对象编程、命令式编程、函数式编程
Swift：面向对象编程、函数式编程、指令式编程

PAT 1154 Vertex Coloring （25 分）-甲级

A proper vertex coloring is a labeling of the graph’s vertices with colors such that no two vertices sharing the same edge have the same color. A coloring using at most k colors is called a (proper) k-coloring.

Now you are supposed to tell if a given coloring is a proper k-coloring.

Input Specification:
Each input file contains one test case. For each case, the first line gives two positive integers N and M (both no more than 10⁴), being the total numbers of vertices and edges, respectively. Then M lines follow, each describes an edge by giving the indices (from 0 to N−1) of the two ends of the edge.

After the graph, a positive integer K (≤ 100) is given, which is the number of colorings you are supposed to check. Then K lines follow, each contains N colors which are represented by non-negative integers in the range of int. The i-th color is the color of the i-th vertex.

Output Specification:
For each coloring, print in a line k-coloring if it is a proper k-coloring for some positive k, or No if not.

Sample Input:
10 11
8 7
6 8
4 5
8 4
8 1
1 2
1 4
9 8
9 1
1 0
2 4
4
0 1 0 1 4 1 0 1 3 0
0 1 0 1 4 1 0 1 0 0
8 1 0 1 4 1 0 5 3 0
1 2 3 4 5 6 7 8 8 9
Sample Output:
4-coloring
No
6-coloring
No

题目大意：给出一个图（先给出所有边，后给出每个点的颜色），问是否满足：所有的边的两个点的颜色不相同
分析：把所有边存起来，把所有点的颜色存起来（存的过程中放入set统计颜色个数），枚举所有边，检查是否每条边的两点个颜色是否相同，若全不相同，则输出颜色个数，否则输出No～

#include <iostream>
#include <vector>
#include <set>
using namespace std;
struct node {int t1, t2;};
int main() {
    int n, m, k;
    cin >> n >> m;
    vector<node> v(m);
    for (int i = 0; i < m; i++)
        scanf("%d %d", &v[i].t1, &v[i].t2);
    cin >> k;
    while (k--) {
        int a[10009] = {0};
        bool flag = true;
        set<int> se;
        for (int i = 0; i < n; i++) {
            scanf("%d", &a[i]);
            se.insert(a[i]);
        }
        for (int i = 0; i < m; i++) {
            if (a[v[i].t1] == a[v[i].t2]) {
                flag = false;
                break;
            }
        }
        if (flag) 
            printf("%d-coloring\n", se.size());
        else 
            printf("No\n");
    }
    return 0;
}

#include <iostream>

#include <vector>

#include <set>

using namespace std;

struct node {int t1, t2;};

int main() {

int n, m, k;

cin >> n >> m;

vector<node> v(m);

for (int i = 0; i < m; i++)

scanf("%d %d", &v[i].t1, &v[i].t2);

cin >> k;

while (k--) {

int a[10009] = {0};

bool flag = true;

set<int> se;

for (int i = 0; i < n; i++) {

scanf("%d", &a[i]);

se.insert(a[i]);

}

for (int i = 0; i < m; i++) {

if (a[v[i].t1] == a[v[i].t2]) {

flag = false;

break;

}

if (flag)

printf("%d-coloring\n", se.size());

else

printf("No\n");

}

return 0;

}

【iOS】iPad & iPhone Launch Image 启动页图片尺寸大小（包括iPhone XR / Xs / Max）

Swift语言代码格式规范样例

代码来源于：《The Swift Programming Language Swift 4.2》

for循环 | if语句 | switch语句

for score in individualScores {
    if score > 50 {
        teamScore += 3
    } else {
        teamScore += 1
    }
}

switch vegetable {
case "celery":
    print("Add some raisins and make ants on a log.")
case "cucumber", "watercress":
    print("That would make a good tea sandwich.")
case let x where x.hasSuffix("pepper"):
    print("Is it a spicy \(x)?")
default:
    print("Everything tastes good in soup.")
}

for score in individualScores {

if score > 50 {

teamScore += 3

} else {

teamScore += 1

}

switch vegetable {

case "celery":

print("Add some raisins and make ants on a log.")

case "cucumber", "watercress":

print("That would make a good tea sandwich.")

case let x where x.hasSuffix("pepper"):

print("Is it a spicy \(x)?")

default:

print("Everything tastes good in soup.")

}

函数 | 闭包

func greet(_ person: String, on day: String) -> String {
    return "Hello \(person), today is \(day)."
}
greet("John", on: "Wednesday")

let mappedNumbers = numbers.map({ number in 3 * number })
print(mappedNumbers)

func greet(_ person: String, on day: String) -> String {

return "Hello \(person), today is \(day)."

}

greet("John", on: "Wednesday")

let mappedNumbers = numbers.map({ number in 3 * number })

print(mappedNumbers)

类

class Square: NamedShape {
    var sideLength: Double

    init(sideLength: Double, name: String) {
        self.sideLength = sideLength
        super.init(name: name)
        numberOfSides = 4
    }

    func area() -> Double {
        return sideLength * sideLength
    }

    override func simpleDescription() -> String {
        return "A square with sides of length \(sideLength)."
    }
}
let test = Square(sideLength: 5.2, name: "my test square")
test.area()
test.simpleDescription()

class Square: NamedShape {

var sideLength: Double

init(sideLength: Double, name: String) {

self.sideLength = sideLength

super.init(name: name)

numberOfSides = 4

}

func area() -> Double {

return sideLength * sideLength

}

override func simpleDescription() -> String {

return "A square with sides of length \(sideLength)."

}

let test = Square(sideLength: 5.2, name: "my test square")

test.area()

test.simpleDescription()

枚举 | 结构体

enum Rank: Int {
    case ace = 1
    case two, three, four, five, six, seven, eight, nine, ten
    case jack, queen, king
    func simpleDescription() -> String {
        switch self {
        case .ace:
            return "ace"
        case .jack:
            return "jack"
        case .queen:
            return "queen"
        case .king:
            return "king"
        default:
            return String(self.rawValue)
        }
    }
}

struct Card {
    var rank: Rank
    var suit: Suit
    func simpleDescription() -> String {
        return "The \(rank.simpleDescription()) of \(suit.simpleDescription())"
    }
}

enum Rank: Int {

case ace = 1

case two, three, four, five, six, seven, eight, nine, ten

case jack, queen, king

func simpleDescription() -> String {

switch self {

case .ace:

return "ace"

case .jack:

return "jack"

case .queen:

return "queen"

case .king:

return "king"

default:

return String(self.rawValue)

}

struct Card {

var rank: Rank

var suit: Suit

func simpleDescription() -> String {

return "The \(rank.simpleDescription()) of \(suit.simpleDescription())"

}

错误处理

do {
    let printerResponse = try send(job: 1040, toPrinter: "Bi Sheng")
    print(printerResponse)
} catch {
    print(error)
}

let printerSuccess = try? send(job: 1884, toPrinter: "Mergenthaler")

do {

let printerResponse = try send(job: 1040, toPrinter: "Bi Sheng")

print(printerResponse)

} catch {

print(error)

}

let printerSuccess = try? send(job: 1884, toPrinter: "Mergenthaler")

泛型

func makeArray<Item>(repeating item: Item, numberOfTimes: Int) -> [Item] {
    var result = [Item]()
    for _ in 0..<numberOfTimes {
        result.append(item)
    }
    return result
}
makeArray(repeating: "knock", numberOfTimes: 4)

func makeArray<Item>(repeating item: Item, numberOfTimes: Int) -> [Item] {

var result = [Item]()

for _ in 0..<numberOfTimes {

result.append(item)

}

return result

}

makeArray(repeating: "knock", numberOfTimes: 4)