replicator 2x

device IPhone width Width high Height Diagonal Diagonal logical resolution (point) scale Factor device resolution (pixel) PPI 3GS 2.4 inches (62.1 mm) 4.5 inches (115.5 mm) 3.5-inch 320x480 @1x 320x480 163 4 (s) 2.31 inches (58.6 mm) 4.5 inches (115.2 mm) 3.5-inch 320x480 @

The realization of Launch screen in IOS7/8The 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.

Launch image is the app's startup image, Launchscreen is the function after iOS8, both can set the app's startup picture. IOS8 after the official recommended the use of launch Screen.xib, in the xib through the ImageView set up the image, both methods are more suitable for development use.Launch Image ModeLaunch image mode should be the most common way, first you need to create a new Launch image, as shown in:2. Modify the supported settings and machine types to give different sizes for differen

First, the function of the parity may also be given in what form?1, give directly;The function \ (f (x) \) is an odd function on a range \ (d\) .2, the definition of the given;such as \ (\forall x \in d,f (×) =-f (x) \), then it is an odd function. such as functions \ (f (x) =x^3\),3, the definition of the variable form given;such as \ (\forall x \in d,f (x) + f (×) =0\),\ (\cfrac{f (-X)}{f (x)}=\pm 1 (f (x) \neq0) \)."Apply ①"such as functions \ (f (x) =ln (\sqrt{x^2+1}-x) \),(f (-X) =ln (\sqrt

Table 45-1Size (in pixels) of custom icons and images Asset iphone 6s Plus and iphone 6 Plus (@3x) iphone 6s, iphone 6, and iphone 5 (@2x) IPhone 4s (@2x) ipad and ipad mini (@2x) ipad 2 and ipad mini (@1x) IPad Pro (@2x) APP icon (requiredfor all apps

to the sprite table. Frames is the coordinates of each UI element.[X, y, width, height] Animations is the name of each item. Please note that we have used a high-definition image to create a Sprite table, and then we only need to adjust the image size to half to create a normal version. Integrate everything Now, we only need a piece of JavaScriptCodeTo use it. VaR ssasset = function (asset, Div) {var CSS, X, Y, W, H; // divide the coordinates by 2 as retina devices have

IPhone Portrait IOS 8-retina HD 5.5 (1242x2208) @3xIPhone Portrait IOS 8-retina HD 4.7 (750x1334) @2xIPhone Portrait IOS 7,8-2x (640x960) @2xIPhone Portrait IOS 7,8-retina 4 (640x1136) @2xIPhone Portrait IOS 5,6-1x (320x480) @1xIPhone Portrait IOS 5,6-2x (640x960) @2xIPhone Portrait IOS 5,6-retina4 (640x1136) @2xIpad768 x 1024x768 pixels1536 x 2048 pixels (@2x)10

iphone Size Specifications EquipmentIphone WideWidth HighHeight DiagonalDiagonal Logical Resolution (point) Scale Factor Device Resolution (pixel) Ppi 3GS 2.4 inches (62.1 mm) 4.5 inches (115.5 mm) 3.5-inch 320x480 @1x 320x480 163 4 (s) 2.31 inches (58.6 mm) 4.5 inches (115.2 mm) 3.5-inch 320x480 @2x 640x960

are as follows. Obtain the approximate value of root number a: First, just guess an approximate value of x, and then make x equal to the average of x and a/x. after six or seven iterations, the value of x is quite accurate. For example, I want to calculate the value of root 2. If I guess the 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

, will force +1 to ensure that the resulting 2x picture is even widthHigh, default 0UseimagesetOptional, whether to use Image-set as a 2x image implementation, default does not useNewspriteOptional, whether to generate a new sprite file with a timestamp for the file name, if enabled please note that the files generated before the cleanup, the default does not generate new filesSpritestampOptional, whether t

complexity will be O (nlogx). Note that the maximum value of X is 1e9 + 1e5. Code: #include 460d little Victor and set Construct a set so that there are no more than k elements in the set and each element is in the [L, R] interval to ask how many elements are exclusive or least and to the set and output a scheme. Ideas: A good idea. I can only think of classification at the beginning. First, there is only one element that is so different or that the L solution is also an L Then there are two

) = \ int_0 ^ x F (x-T) \ sin t \ rd t = \ int_0 ^ x F (s) \ sin (X-S) \ RD s \ EEx $ Zhi $ \ Bex G' (x) = \ int_0 ^ x F (s) \ cos (X-S) \ rd s, \ quad g'' (x) = f (x)-\ int_0 ^ x F (s) \ sin (X-S) \ rd s. \ EEx $ then $ \ Bex g'' + G = F, \ quad g (0) = G' (0) = 0. \ EEx $ 3 ($ 15' $) calculates the maximum curvature of the curve $ Y = e ^ x $. Answer: curvature $ \ Bex \ Kappa (x) = \ frac {y''} {(1 + y' ^ 2) ^ {3/2 }}=\ frac {e ^ x} {(1 + e ^ {2x}

1. Compound function Operators Prelude> :t (.)(.) :: (b -> c) -> (a -> b) -> a -> cPrelude> (.) ((+) 5) ((*) 2) 413 　　 Therefore, the function of the (.) operator is to pass 4 as a parameter to (*) 2) function, and then pass the result to (+) 5) function. This is the compound function in mathematics: F (x) = 2x G (x) = x + 5 G (f (x) = g (2x) = (2x) + 5 =

/* Chapter 2 8. calculate the approximate polynomial value x ^ 4 + 2x ^ 3 + 3x ^ 2 + 8x + 7, x = 3.47 */# include The first mistake that beginners can easily make on this topic is to write the following expression to evaluate it. X^4+2*X^3+3*X^2+8*X+7 The error in this expression is that "^" is treated as a power calculation by mistake. However, in C language, there is no power calculation. Generally, the power is obtained. Is represented by multipli

I recently wrote another IOS skin swap APP, which uses the dynamic loading of images. This scenario is generally divided into two types: APP built-in resources (in the APP package ), another method is to download resources (resources under Documents). In this case, we will encounter a problem where all the objects uploaded by Documents are xxxx.png without the @ 2x suffix. If I use the common method as follows: UIImage imageNamed: In this method, we d

# Include # Include # Include # Include IntMain (INT argc, char ** argv){ Char STR [] = "172.16.10.196 ";//Char str1 [16];Struct in_addr myin;Int ret = 1; unsigned long lip = 0xac100ac4; ret = inet_pton (af_inet, STR, myin ); // The converted myin is in the network order printf ("% 2x/N", myin. s_addr); myin. s_addr = ntohl (myin. s_addr); printf ("% 2x/N", myin. s_addr); printf ("%

-ratio: 2), only screen and (min-device-pixel-ratio: 2) {/* 2x resolution execution style */} External link style: 2. Use JavaScript to replace the image address, which is suitable for external link images loaded by First, use window. devicepixelratio to determine whether the resolution is high, and then replace the image address. For details about this method, refer to the following article on the analysis of the apple.com solution:Http://blog.cloud

web design thinking. Only 4-5 rows can be displayed on the 3GS, and 4s can display 9-10 rows, and each row becomes particularly wide. But the two phones are actually the same size. If shown in this way, the 3GS is just good effect, on the 4s will be small to see the word is not clear at all.In reality, the two effects are the same. This is because the retina screen uses a 2x2 pixel as 1 pixels. For example, the top navigation bar, which is 44 pixels high, is displayed with a height of 88 pixels

root A is actually a positive real roots of x^2-a=0, the derivative of this function is 2x. That is, the tangent slope of the function at any point (x,f (x)) is 2x. So, x-f (x)/(2x) is an approximation that is closer than X. Substituting f (x) =x^2-a gets x (x^2-a)/(2x), i.e. (x+a/x)/2. The relevant code is as follows

create perfect shapes and lines. Even if we bloom the picture in a certain proportion and then export it through Photoshop, the picture that comes out is also a blurry appearance, especially when it comes to small icons. How code controls Retina images Once you create a copy of a standard picture, and the copy is twice times the size of the standard picture, you can load them into your page in a different way. Here's a quick way to name a file, put the standard picture and Retina screen pictu