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Articles on Trending Technologies
Technical articles with clear explanations and examples
How to disable the network in iOS Simulator?
Sometimes while testing our app on simulator we need to test for case where no internet is available. This can be achieved in multiple ways.Below are some of the possible ways to do itEasiest but not the most correct way is to disconnect your mac from the LAN Cable is you are on a LAN, or turn off the wifi if you are connected on a wifi network. But that will definitely turn off internet for your whole device, not just simulator. So, there are some more ways to do itDownload Hardware IO tools for Xcode.Go to Xcode menu, select ...
Read MoreHow to create a Border, Border radius, and shadow to a UIView in iPhone/iOS?
In this article we’ll learn how to create borders and shadows. We’ll do it in two ways, one by directly coding and one by making it designable and an extension of UIView, which can be edited directly in the storyboard.Let’s see how to play around with borders in ios −Method 1 − Creating borders with simple coding –Borders are a property of layer, above which a View is drawn, a border has the following properties, Border color, border width.self.view.layer.borderColor = colorLiteral(red: 0.4392156899, green: 0.01176470611, blue: 0.1921568662, alpha: 1) self.view.layer.borderWidth = 5.0To create corner radius of a view we can useself.view.layer.cornerRadius ...
Read MoreRegisters of 8085 Microprocessor
It has eight addressable 8-bit registers: A, B, C, D, E, H, L, F, and two 16-bit registers PC and SP. These registers can be classified as −General Purpose RegistersTemporary Registers: a) Temporary data register b) W and Z registersSpecial Purpose Registers: a)Accumulator b) Flag registers c) Instruction registerSixteen-bit Registers: a) ProgramCounter (PC) b) Stack Pointer (SP)General Purpose RegistersRegisters B, C, D, E, H, and L are general purpose registers in 8085 Microprocessor. All these GPRS are 8-bits wide. They are less important than the accumulator. They are used to store data temporarily during the execution of the program. For ...
Read MoreHow to take a screenshot of my iOS application in the iOS simulator?
To take a screenshot of an iOS Application running in Simulator you can you any of the below ways.Capturing device Screen − you can capture your Mac's screen from the area your simulator is running in. to do this you have to press, Command, shift and 4 at the same time, then drag to select the area you want to capture. Alternatively you can press 3 instead of 4 to capture the whole screen.Open simulator, and press Command along with S at the same time, this will take a screenshot and save on desktop generally.you can also open simulator, go ...
Read MoreAD7-0 pins in 8085 Microprocessor
The Intel 8085 is an 8-bit microprocessor produced by Intel and introduced in 1976. It is a software-binary compatible with the more-famous Intel 8080 with only two minor instructions added to support its added interrupt and serial input/output features. When the 8085desires to receive 8-bit information, it receives it on these eight pins AD7, AD6, …, AD0. These eight pins are collectively called AD7-0. They are called basically “Address Data”. When the 8085 desires to send out 8-bit information, it sends it out on these same pins. these pins are bi-directional pins.The same lines are used for both receiving information and ...
Read MoreHow to hide Back Button on navigation bar on iPhone/iPad?
To hide the back button on navigation bar we’ll have to either set the navigation button as nil and then hide it or hide it directly.Let’s create a project, add 2 view controller and Embed them in navigation controller. Let’s see how this project looks when run without any code to remove the navigation bar.This code set’s the navigation bar’s back button as hidden.self.navigationController?.navigationItem.hidesBackButton = trueThis code set’s the navigation bar’s back button as nilself.navigationItem.leftBarButtonItem = nil;A combination of these to approaches would be a better solution and works even if you have set a custom navigation bar.self.navigationItem.leftBarButtonItem = nil ...
Read MoreCorona vs. Phonegap vs. Titanium
In this article we’ll learn about Corona, PhoneGap and Titanium, though all these technologies are different, the common thing between these is that they all are cross platform. i.e they can be used to write program once and then run that on multiple platforms like iPhones and android devices.Corona − Corona is a free and open source SDK (Software development kit), developed by corona Labs roughly 10 years ago in 2009. Corona is mainly for developing 2D mobile applications for most of the platforms including iOS, Android, Desktop/ Windows Applications. Corona is based on top of C++ and openGL to ...
Read MoreProgram memory structure of Intel 8051
We have already discussed that the 8051 microcontroller has the internal program memory. In this chip, there is EA pin. It indicates the External Access. So by using this pin, we can check whether the internal program memory is used or not. So when there is a low signal in this pin, the internal 4K bytes of program memory is not used, but in this situation, it can access only the ROM.When we are trying to access the external data memory, then the read RD or write WR will be the output from 8051. So for reading the data from ...
Read MoreData Memory Structure of Intel 8051
The 8051 has 128 bytes of On-Chip RAM. So for accessing that RAM area, the address space is 00H to 7FH. When we need more data memory, we can use external RAM. The address space of external RAM is 0000H to FFFFH.The external and internal data memory can be added to increase the total amount of data memory. When we are trying to access the external data memory, then the read RD or write WR will be the output from 8051. The external data memory address can be either 8-bit or 16-bit wide. Generally, the one 8-bit address is used ...
Read More2's complement notation
This is one of the methods of representing signed integers in the computer. In this method, the most significant digit (MSD) takes on extra meaning.If the MSD is a 0, we can evaluate the number just as we would any normal unsigned integer.If the MSD is a 1, this indicates that the number is negative.The other bits indicate the magnitude (absolute value) of the number.If the number is negative, the other bits signify the 2'scomplement of the magnitude of the number.Thus a positive number has the same representation in SM, 1's complement, and 2's complement notations. Only negative numbers are represented ...
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