Learn with me some conventions, patterns, and three callback mechanisms in iOS (2 ).

Document directory 2. Delegate in iOS, use combination instead of Inheritance In section 1, we learned about the ObjectC syntax. In section 2, before getting started, we should first understand some basic conventions and patterns in

Router configuration for new users-IOS Introduction

I0S (Internet work 0 perating System, an inter-network operating System) is a special software that can be used to configure Cisco router hardware so that information can be routed from one network or bridge to another. 10 s is the "power source" of

The two Cisco routers upgrade each other to IOS

I have a 2501 router whose IOS is bad (cisocB), another 2501 router whose IOS is good (ciscoA), and a good IOS has no more on my PC, however, it is a waste of time to create a TFTP file on the PC and upload the file to the PC ,. Then I thought of a

How to restore a Cisco device to IOS

IOSRecovered2Method If you accidentally delete the Router or Switch IOS, especially if the IOS in Flash and the Mini IOS in ROM are no longer available, what can be done to restore it? There are two methods. Actually, I only know two types :) Method

AssetsLibrary cannot obtain all local albums

There are two local albums: Camera Film and Photo Gallery. The latter is generated through synchronization. Dispatch_async (dispatch_get_main_queue (), ^ {[_ assetsLibrary partition: ALAssetsGroupAll usingBlock: ^ (ALAssetsGroup * group, BOOL * stop)

In iOS, click the button to modify the text size.

Create UILabel Self. lbl = [[UILabel alloc] initWithFrame: CGRectMake (135,290,200, 35)];Self. lbl. backgroundColor = [UIColor clearColor];NSString * str = [NSString stringWithFormat: @ "%. f", [self. slider value];[Self. lbl setFont: [UIFont

Solution: ios UITableView content cannot be refreshed

When using UITableView, If you modify some UITableViewCell-related content in UITableView in another view, you need to re-load the modified data when calling popViewController to return the UITableView, UITableViewCell data is not reloaded by

Top 10 issues to be solved before developing iOS applications

This article will show you 10 questions you may want to ask before developing iOS apps (iPhone, iPad, and iPod. 1. which platform should we target? Only iOS and iPad and Android have sufficient downloads, purchases, and usage. Other platforms also

How to avoid Memory leakage in iPhone applications

When creating an object, the ownership is created through alloc, new, or copy, and then the ownership of the object is assigned and copied by calling the retain or using the Cocoa function. There are two ways to release the memory: one is to

Summary of cisco switch fault recovery solutions triggered by IOS

Summary of the fault recovery solution for cisco switches triggered by IOS, today's topic on preventing cisco switch faults is discussed about how to cope with cisco switch faults when using cisco switches, to avoid the problem of no network

Use FTP to transmit IOS files on a Cisco device

Using FTP to transfer files between routers and servers is introduced in Cisco IOS Release 12.0. Because FTP is a connection-oriented application using TCP/IP, it provides better throughput and success rate than TFTP. TFTP is a connectionless

16 levels of permissions for Cisco IOS

This article gives a detailed introduction to the sixteen types of permissions of Cisco routers. It will be helpful for our future research process and technical issues. This article will give you a detailed introduction. Many network administrators

Cisco IOS Firewall: simple configuration of CBAC (1)

This article describes in detail how to configure CBAC from the basic concepts of CBAC, the services that can be provided, and the intercommunication between hosts. It also introduces the CBAC configuration skills. CBAC: an advanced firewall module

How to limit the number of NAT connections per user on Cisco IOS

This article describes in detail how IOS uses NAT to limit the number of user connections? I believe this article will help you. The IOS software after Cisco IOS 12.3 (4) T supports NAT single-user restrictions, that is, you can limit the number of

Cisco IOS Firewall Command Parsing

This article describes how to configure the Cisco IOS Firewall and how to configure IOS. Although some people think that the firewall is no longer brilliant, I believe that if you fully utilize the firewall function of the device, it is still a

Analysis on the concept of AAA and the configuration of Cisco IOS

This article describes in detail how to configure Cisco routers for IOS and the concept of AAA. I believe this article will help you. In your life, you may use authentication, authorization, and AAA every day in some form. But what does AAA

Use the boot system command to change the IOS loading location

The following example shows how to use a set of boot system commands to specify the location where the cisco IOS software is loaded. 1. Load from Flash: In the configuration process, flash is usually configured as the first position to load IOS

An instance that loads Cisco router IOS in TFTP and ROM

The question about Cisco router IOS is described in the following aspects: how to load in flash, TFTP, or ROM? The following example shows how to use a set of boot system commands to specify the location where the cisco IOS software is loaded. 1.

Router configuration newbie --- IOS Introduction

This article mainly introduces how to upgrade IOS and configure Cisco routers for beginners. I believe this article will help you. IOS (Internet work 0 perating System, an inter-network operating System) is a special software that can be used to

Use TFTP in rommon mode to fix IOS faults

This article gives you a detailed description of how to use TFTP to fix IOS faults in rommon mode. Here we will use a specific case to explain in detail. The topology is as follows: Fault description: R1 IOS cannot enter ios due to damage or loss,

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