iOS开发入门2

11.开发框架一览 

 打开软件——Hlep——developer Documentation——UIkit

（框架：利用工具制作实际的应用）

App Framework（软件框架）

12.UIKit简介

（打开同1.1）

UIApplication 代表整个APP

UI Device 代表整个的设备

User Interface 代表交互界面

NS——操作系统

思维导图

13.UIViewController

箭头➡️ entry point 当前应用的入口

加号 Navigation Controller

➡️Root Controller （直向进行）管理列表的控制器 ——Table View Cell——Content ——Static Cells静态模式——可以直接在模式中设置数据

➡️Table Controller （网状结构）

点击对应想要连接的开头文件 ➡️control➡️下一个想要连接的文件➡️选择ViewContrller（创造联系）

Bundle 管理各种各样的资源

三种搭建方法（UserInterface）  最后打包的时候xib转为nib

（新建文件夹的快捷方式：Shift+cmmand+n）

14.视图与控件

view.safeAreaInsets.top 防止颜色被顶端占领14
按钮约束——长按control键键头拖向View，再选取相关约束种类。“自动布局”（同前面frame函数“手动布局”的运用相同，两个方法约束）

constene 线的长度是多少

priority 约束的优先级

multiplier 约束的倍数

15. 滚动控件UIScrollView

相关设置：

//
//  ViewController.m
//  UIScrollView-滚动视图
//
//  Created by sofia 朱 on 2023/1/30
//  Copyright © 2020 Liu,Wenbo(TBRD). All rights reserved.
//

#import "ViewController.h"

@interface ViewController () <UIScrollViewDelegate&gt; //设置代理
{
    UIScrollView *scrollview;
    UILabel *lable;
    UIImageView *imageView;
}
@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    
    scrollview = [[UIScrollView alloc] initWithFrame:self.view.frame];
    scrollview.backgroundColor = [UIColor grayColor];
    
    UIImage *image = [UIImage imageNamed:@"test1.png"];
    imageView = [[UIImageView alloc] initWithFrame:CGRectMake(self.view.frame.origin.x, self.view.frame.origin.y, self.view.frame.size.width, self.view.frame.size.height)];
    imageView.image = image;
    
    [scrollview addSubview:imageView];
    
    lable = [[UILabel alloc] initWithFrame:CGRectMake(150, 150, 100, 100)];
    lable.backgroundColor = [UIColor whiteColor];
    
    //设置滚动视图的内容区域
    scrollview.contentSize = CGSizeMake(self.view.frame.size.width * 2, self.view.frame.size.height * 2);
    
    //设置内容区域位置的偏移量 这里设置到了最右边
    scrollview.contentOffset = CGPointMake(self.view.frame.size.width, 0);
    
    //设置内容区域大小的偏移量  这里相当于多加一个屏幕的大小
    scrollview.contentInset = UIEdgeInsetsMake(0, self.view.frame.size.width, 0, 0);
    
    //设置代理
    scrollview.delegate = self;
    
    //方向锁定 先水平滑动则限定水平滑动（既不能垂直滑动);先垂直滑动的话就限定垂直滑动；但是对角线上没有限定
    scrollview.directionalLockEnabled = YES;
    
    //设置是否允许回弹
    scrollview.bounces = NO;
    
    //设置滑动提示线是否显示
    //scrollview.showsVerticalScrollIndicator = YES;
    
    //设置提示线的风格
    scrollview.indicatorStyle = UIScrollViewIndicatorStyleWhite;
    
    //设置scrollview的加速度
    //scrollview.decelerationRate = 0.5;
    
    //设置scrollview的缩放比
    scrollview.minimumZoomScale = 0.5; // 最小缩0.5
    scrollview.maximumZoomScale = 2; //最大扩大2
   
    
    [scrollview addSubview:lable];
    [self.view addSubview: scrollview];
}

//想缩放哪个控件就返回哪个控件
-(UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView{
    return imageView;
}

• (1条消息) UIScrollView-滚动控件_liudongshizhang的博客-CSDN博客_uiscrollview 滚动

16. 列表控件UITableView

初步了解：

• (1条消息) iOS UITableView(列表)_mazaiting的博客-CSDN博客

关于设置具体的相关内容：

• (1条消息) iOS UITableView(列表)_mazaiting的博客-CSDN博客

17.UICollectionView

他言明需要注册cell，否则就会崩溃，实现代理的方法：

- (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView {
    return 1;
}

- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section {
    return 9;
}

- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {

    UICollectionViewCell* cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"cell" forIndexPath:indexPath];
    cell.backgroundColor = [UIColor colorWithRed:arc4random()%255/255.0 green:arc4random()%255/255.0 blue:arc4random()%255/255.0 alpha:1];
    return cell;
}

• (1条消息) 【iOS开发】—— UICollectionView的介绍_轩墨️的博客-CSDN博客_uicollectionview

实现九宫格布局：

UICollectionViewFlowLayout* flowLayout = [[UICollectionViewFlowLayout alloc] init];
    //定义每个cell的大小
    flowLayout.itemSize = CGSizeMake((self.view.frame.size.width - 80) / 3, 100);
    //定义布局方向
    flowLayout.scrollDirection = UICollectionViewScrollDirectionVertical;
    //定义每个cell纵向的间距
    flowLayout.minimumLineSpacing = 20;
    //定义每个cell的横向间距
    flowLayout.minimumInteritemSpacing = 20;
    //定义每个cell到容器边缘的距离
    flowLayout.sectionInset = UIEdgeInsetsMake(20, 20, 20, 20);
    self.collectionView = [[UICollectionView alloc] initWithFrame:self.view.frame collectionViewLayout:flowLayout];
    //注册cell
    [self.collectionView registerClass:[UICollectionViewCell class] forCellWithReuseIdentifier:@"cell"];
    //设置代理
    self.collectionView.delegate = self;
    //设置数据源
    self.collectionView.dataSource = self;
    [self.view addSubview:self.collectionView];

18.包管理CocoaPods字幕版

CocoaPods  包管理工具

terminal  终端  2.23

问题1：终端中no such file or directory

➡️cd no such file or directory

• (2条消息) linux cd进入目录出现no such file or directory_chongsingwah的博客-CSDN博客​​​​​​​

➡️zsh no such file or directory

• (2条消息) zsh: no such file or directory: /usr/local/mysql/bin/mysql_Czh啊哈的博客-CSDN博客

但是最终解决是因为路径未标明，一下子全写上去了，电脑无法识别，一步一步写上去就不会报错了。（可见下面代码）

问题2：[!] No Xcode project found, please specify one

• (2条消息) CocoaPods的安装与使用_ailinghao的博客-CSDN博客_cocoapods安装

但是问题仍然未被解决—— Successfully installed cocoapods-1.11.3已经出现，但相关demo project仍然未出现

问题得到解决——因为使用桌面创建文件夹时桌面大文件夹名字与其中小文件夹相同，系统优先识别打文件夹，导致ViewControllerDemo.xcodeproj未被识别出。

cd Desktop
MacBook-Air Desktop % cd gift
MacBook-Air gift % cd ViewControllerDemo
MacBook-Air ViewControllerDemo % ls
ViewControllerDemo		ViewControllerDemo.xcodeproj

问题3: No string under cursor

解决方法：错误就应该是没有按“i”进入插入模式。再按一下“ESC”，即可。

问题4:在打开Podfile后终端由于未知原因无法操作，故只能又从头开始

VScode

问题5:当复制粘贴过来的网址出现报错，网址无法找到时

[!] Smart quotes were detected and ignored in your Podfile. To avoid issues in the future, you should not use TextEdit for editing it. If you are not using TextEdit, you should turn off smart quotes in your editor of choice.

[!] The Podfile does not contain any dependencies.

[!] Automatically assigning platform `iOS` with version `16.2` on target `ViewControllerDemo` because no platform was specified. Please specify a platform for this target in your Podfile. See `https://guides.cocoapods.org/syntax/podfile.html#platform`.

使用 gem sources 将网址转换为中国的

github导入时需要注意swift的版本

19.工程设置

问题1公匙私匙：（终端）

• (2条消息) 服务器上的 Git – 生成 SSH 公钥_北冥牧之的博客-CSDN博客_生成ssh公钥

Key is invalid. You must supply a key in OpenSSH public key format  ：

cat ~/.ssh/sofiazhu_rsa.pub

• (1条消息) Github 添加 ssh key 报错：Key is invalid. You ust supply a key in OpenSSH public key format_莫亓的博客-CSDN博客

• (1条消息) id_rsa 、id_rsa.pub与数字签名与数字证书_Marry Andy的博客-CSDN博客_id_rsa和id_rsa.pub

问题2   Permission denied (publickey).（主要问题：权限被拒绝（公钥））

fatal: Could not read from remote repository.

Please make sure you have the correct access rights

and the repository exists.

开始认为是因为仓库未设私钥，但设置后发现仍然出现同样问题。

• (1条消息) 解决Permission denied (publickey)._Locutus的博客-CSDN博客

MacBook-Air .ssh % vim /etc/ssh/sshd_config

#       $OpenBSD: sshd_config,v 1.104 2021/07/02 05:11:21 dtucker Exp $

# This is the sshd server system-wide configuration file.  See
# sshd_config(5) for more information.

# This sshd was compiled with PATH=/usr/bin:/bin:/usr/sbin:/sbin

# The strategy used for options in the default sshd_config shipped with
# OpenSSH is to specify options with their default value where
# possible, but leave them commented.  Uncommented options override the
# default value.

# This Include directive is not part of the default sshd_config shipped with
# OpenSSH. Options set in the included configuration files generally override
# those that follow.  The defaults only apply to options that have not been
# explicitly set.  Options that appear multiple times keep the first value set,
# unless they are a multivalue option such as HostKey.
Include /etc/ssh/sshd_config.d/*

#Port 22
#AddressFamily any
#ListenAddress 0.0.0.0
#ListenAddress ::

#HostKey /etc/ssh/ssh_host_rsa_key
#HostKey /etc/ssh/ssh_host_ecdsa_key
#HostKey /etc/ssh/ssh_host_ed25519_key

# Ciphers and keying
#RekeyLimit default none

# Logging
#SyslogFacility AUTH
#LogLevel INFO

# Authentication:

#LoginGraceTime 2m
#PermitRootLogin prohibit-password
#StrictModes yes
#MaxAuthTries 6
#MaxSessions 10

#PubkeyAuthentication yes

# The default is to check both .ssh/authorized_keys and .ssh/authorized_keys2
# but this is overridden so installations will only check .ssh/authorized_keys
AuthorizedKeysFile      .ssh/authorized_keys

#AuthorizedPrincipalsFile none

#AuthorizedKeysCommand none
#AuthorizedKeysCommandUser nobody

# For this to work you will also need host keys in /etc/ssh/ssh_known_hosts
#HostbasedAuthentication no
# Change to yes if you don't trust ~/.ssh/known_hosts for
# HostbasedAuthentication
#IgnoreUserKnownHosts no
# Don't read the user's ~/.rhosts and ~/.shosts files
#IgnoreRhosts yes

# To disable tunneled clear text passwords, change to no here!
#PasswordAuthentication yes

问题3：Key is invalid. You must supply a key in OpenSSH public key format（密钥无效。您必须提供OpenSSH公钥格式的密钥）

• ​​​​​​​(1条消息) 解决问题：Key is invalid. You must supply a key in OpenSSH public key format_风卷残云_迟来大师的博客-CSDN博客

（无效问题）

问题4 :  Could not read from remote repository.

Please make sure you have the correct access rights

and the repository exists.​​​​​​​

• (1条消息) Could not read from remote repository.Please make sure you have the correct access rights.解决方法_火海夕的博客-CSDN博客

终端关于——返回上一级目录

方法一：

1、例如点击终端。

2、然后输入【pwd】，显示当前所在的路径。（✅）

3、然后上级目录是根下面的home，那么返回上级目录，输入【cd /home】不要少了斜杠。（完成后直接到达home目录，对于上级目录不可行）

4、再次【pwd】一下，那么即可看到返回到home目录。(✅)

方法二：（可用）

1、或者是简单的，输入：cd

2、输入上级目录替代【..】。

3、那么按下回车键，即可回到上一层。

4  再用cd+文件名到达想要抵达的文件。

sofiadeAir /home % cd ..   
sofiadeAir / % cd

方法三：（偶然使用出来的，通用性待查证）

直接用cd+回车键就可返回初文件

ssofiadeAir ViewControllerDemo % ls
Podfile				ViewControllerDemo
Podfile.lock			ViewControllerDemo.xcodeproj
Pods				ViewControllerDemo.xcworkspace
sofiadeAir ViewControllerDemo % cd
sofiadeAir ~ % cd .ssh
sofiadeAir .ssh % 

检验终端与github连接方式：

sofiadeAir .ssh % ssh -T git@github.com


git@github.com: Permission denied (publickey).

markdown使用方法：

• Markdown 列表 | 菜鸟教程

​​​​​​​需要保存的仓库：

Lottie (动画效果以及动图)

Kingfisher （加载网络图片片的库）

snapkit  （布局方面的库）⚠️语言版本出现差异

git 语言相关描述

git states 查看当前状态

（Git 或者 source tree软件可以查看命令行中无法看清的代码以及修改历史等）

代码007普通

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