replicator 2x

as Apple continues to launch new models, it is well known that UI layouts in iOS development often need to be adapted, and that the adaptation of Apple devices is primarily the 4,5,6,6plus of the 4 devices. The adaptation method has code adaptation and the use of xib to add constraints, where the code adaptation is used to AutoLayout but the official launch of the document and demo is really cumbersome, personally think it is not as stupid as a way to use the aspect ratio of the reality (but the

If the design only gives 3x design drawingsThere are several ways to handle a 2x adaptation : According to the logical pixel, the size does not change, for example 3x mobile phone on a diagram of the logical pixel set to 24x24point, then the 2x phone on the size of the picture is also set to 24x24point, generally for a view of the height of the case, For example, the bottom tab bar of an app or the

) {(f (x + H)-f (x))/H}DF.DX (4); DF.DX (5) # [1] 40.0000163836# [1] 675.000053008app = Newton (f, x0 = 5) app# [1] 4.82370371755 4.79453028339 4.79378501861 4. 79378454069 4.79378454069f (App[length (APP)) # [1] -2.84217094304e-14 Example 3A rectangular piece of cardboard of dimensions $8\times 17$ is used-make an open-top box by cutting out a small square of side $x $ from all corner and bending up the sides. Find a value of $x $ for which the box has volume 100. Solution: Firstly, build

Table of Contents 1. Enable Orgmode Latex Preview to support retina on Mac 1.1. Get the proper version of Emacs 1.2. Change Org-format-latex-options 1.3. Delete ORG.ELC 1.4. Add function to Org.el 1.5. Modify function Org-format-latex 1Enable Orgmode Latex Preview to support retina on MacBy default Orgmode Latex preview don't support retina, so on Mac with Retina screen, latex preview would be fuzzy.However, we can hack org.el to achieve the

This code supports the iphone 6 below. Support iphone and IPad + (nsstring*) getlaunchimagename { nsarray* images= @[@ " Launchimage.png ", @" LaunchImage@2x.png ", @" LaunchImage-700@2x.png ", @" LaunchImage-568h@2x.png ", @" LaunchImage-700-568h@2x.png ", @" Launchimage-700-portrait@2x~ipad.png ", @" Launchimage-portrait@2x~ipad.png ", @" Launchimage-700-portrait~ipad.png ", @" Launchimage-portrait

The visual form of iOS applications is usually driven by graphical elements. When designing and developing an application, you need different specifications for application icons, such as default.png pictures of different sizes, as well as preparing @1x and @2x graphics resources for the implementation of the UI. All of these graphic elements will make your product look more appealing, but the drawbacks are obvious-you need to slice the graph individu

at y = tf (a) + (1−t) f (b) and (for concave upward) The line should isn't be below the curve: For concave downward , the line should is not being above the curve (≤ becomes ≥): And those is the actual definitions of concave upward and concave downward. Remembering Which is Which? Think: Concave up wards = CUP calculus Derivatives can help! The derivative of a function gives the slope. When the slope continually increases, the function is concave upward. When the slope continually d

Do iphone6 and plus when you find a problem, first look at the diagram (all the discussion is done under the real machine, non-simulator)128*750 picture is [email protected]1242*192 picture is [email protected]The reason for the round side is to be able to find the deformation in time. 2x and 3x images are differentiated to see the 2x images below 6 Plus the 3x image.Add these two images to the images.xcass

Source Address: http://blog.shiqichan.com/Launch-Screen-in-iOS-7-and-8/The issues to be addressed in the current project are: Compatible with IOS7 and iOS8, previous versions do not require support for Implementation compatible with 3.5, 4, 4.7 and 5.5 inch screens, vertical screen lauch screen Create the PNG picture you wantFor iphone6/6+ related dimensions see hereThe following size images are required: 1242x2208 for iphone6+, or 1080x1920, or retina HD 5.5 750x1

Automatic cropping tool (C #) for the latest IOS Application Development Icon specifications #), Early in the past, I developed IOS apps. I used C # To write a simple IOS APP development Icon Type Auto-cropping device for IOS apps, at present, there are more and more screen specifications for IOS devices. One version requires several types of resolution icons, which are hard to generate one by one with PS. If there are changes to the Icon, You have to generate it again, therefore, it is easier f

= dict([('name','Bob'),('age',40)])>>> D4{'age': 40, 'name': 'Bob'} Or >>> D = dict(zip(('name','bob'),('age',40)))>>> D{'bob': 40, 'name': 'age'}Method 5: Dict -- fromkeys Method# If the key values are the same, it is better to use this method and you can use fromkeys for initialization. >>> D5 = dict.fromkeys(['A','B'],0)>>> D5{'A': 0, 'B': 0}If the key value is not provided, the default value is None. >>> D3 = dict.fromkeys(['A','B'])>>> D3{'A': None, 'B': None}【 Dictionary-type-value Tr

', ' Bob '), (' Age ', 40))>>> D{' Bob ': +, ' name ': ' Age '} Method Five: Dict--fromkeys method # If the values of the keys are the same, it is better in this way and can be initialized with Fromkeys. The code is as follows: >>> D5 = Dict.fromkeys ([' A ', ' B '],0)>>> D5{' A ': 0, ' B ': 0} If the value of the key is not provided, the default is None The code is as follows: >>> D3 = Dict.fromkeys ([' A ', ' B '])>>> D3{' A ': None, ' B ': none} The method of key value traversal in dictio

: >>> D3 = dict. fromkeys (['A', 'B'])>>> D3{'A': None, 'B': None} III. dictionary-type key-value traversal method The code is as follows: >>> D = {'X': 1, 'y': 2, 'Z': 3} # Method 1>>> For key in D:Print key, '=>', D [key]Y => 2X => 1Z => 3>>> For key, value in D. items (): # Method 2Print key, '=>', valueY => 2X => 1Z => 3 >>> For key in D. iterkeys (): # method 3Print key, '=>', D [key]Y =>

1, version of the differencePYTHON 2X and python3xSummary: 1, the future of the Python development environment only PYTHON3X,2X has been explicitly supported only to 20202, python3x optimized the original code, and PYTHON2X has a lot of sentence syntax changes. such as print3x print "I am python2x", 2x print ("I am python3x"), input and other statements change.3,

A brief history of Python:Python I think the features are simple, flexible and efficient.Python Important version:Python1991 year,PYTHON2.4:2004, the same year the Django framework was born.Python2.6:2008 year launch.PYTHON2.7:2010 year launch.python3.0: In parallel with the 2.6 launch, because of the python implementation of many years of low-level garbage accumulation (as the site has been running for many years, there are a lot of obsolete functions, files) so that language gradually lost its

result is 4, although the error is outrageous, you can see that after using the Newton iteration method, this value quickly approaches the Root 2:(4 + 2/4)/2 = 2.25(2.25 + 2/2.25)/2 = 56944 ..(1. 56944... + 2/1. 56944...)/2 = 1. 42189 ..(1. 42189... + 2/1. 42189...)/2 = 1. 41423 ......The principle of this algorithm is very simple. We just constantly use the tangent of (x, f (x) to approach the root of the equation x ^ 2-a = 0. The root number a is actually a positive root of x ^ 2-a = 0, and t

The issues to be addressed in the current project are: Compatible with IOS7 and iOS8, previous versions do not require support for Implementation compatible with 3.5, 4, 4.7 and 5.5 inch screens, vertical screen lauch screen Create the PNG picture you wantFor iphone6/6+ related dimensions see hereThe following size images are required: 1242x2208 for iphone6+, or 1080x1920, or retina HD 5.5 750x1334 for IPhone6, retina HD 4.7 640x1136 for 4-inch screen (iphone5/

The issues to be addressed in the current project are: Compatible with IOS7 and iOS8, previous versions do not require support for Implementation compatible with 3.5, 4, 4.7 and 5.5 inch screens, vertical screen lauch screen Create the PNG picture you wantFor iphone6/6+ related dimensions see hereThe following size images are required: 1242x2208 for iphone6+, or 1080x1920, or retina HD 5.5 750x1334 for IPhone6, retina HD 4.7 640x1136 for 4-inch screen (iphone5/

APP ICON:@1x:57*57@2x:114*114@3x:171*171 Models Screen size Resolution (PT) Resolution (PX) Ppi Iphone4s 3.5 inches 960*640 480*320 @2x 330 IPhone5S 4.0 inches 1136*640 568*320 @2x 326 Iphone6 4.7 inches 1334*750

known as the artifact; I use the next, feel pretty good, is the label is not too suitable, recommend this.Part 2 PhotoshopSeveral design sizes are now commonly used1. The size of the 640*960 4 era, just touch the app design is this size, the era of quasi-material prevalence (now with this size design should be relatively few bar);2.640*1136 5/5s/5c,iphone Update, we have to follow the design with the times (should still be used in this design size), into the flat era;3.750*1334 6 At present I d