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2014/10/15 ¤U¤È 10:12:48
iphone Programming Glossary: pngsHow to change thin image to fat image in iPhone SDK? http://stackoverflow.com/questions/10186200/how-to-change-thin-image-to-fat-image-in-iphone-sdk data bytes this is where you manipulate the individual pixels assumes a 4 byte pixel consisting of rgb and alpha for PNGs without transparency use i 3 and remove int a for int i 0 i data length i 4 int r i int g i 1 int b i 2 int a i 3 pixels..
iOS PNG Image rotated 90 degrees http://stackoverflow.com/questions/10307521/ios-png-image-rotated-90-degrees PNG Image rotated 90 degrees In my iOS application I'm writing I deal with PNGs because I deal with the alpha channel. For some reason I can load a PNG into my imageView just fine but when it comes time..
Alpha transparent PNGs not displaying correctly in Mobile Safari http://stackoverflow.com/questions/1374618/alpha-transparent-pngs-not-displaying-correctly-in-mobile-safari transparent PNGs not displaying correctly in Mobile Safari I'm using some semi transparent PNGs as background images on various websites... transparent PNGs not displaying correctly in Mobile Safari I'm using some semi transparent PNGs as background images on various websites. These are usually something like a 1x1 image with a 30 percent opaque white layer... tint. Is this a MobileSafari bug I couldn't imagine so or do I need to do something different either to my pages or PNGs Here's how I create the PNGs In Photoshop create a 1x1 transparent canvas. Draw a white rectangle in Layer 1. Set opacity..
Drawing a PNG Image Into a Graphics Context for Blending Mode Manipulation http://stackoverflow.com/questions/1936644/drawing-a-png-image-into-a-graphics-context-for-blending-mode-manipulation a PNG Image Into a Graphics Context for Blending Mode Manipulation I need to draw a series of PNGs into a CG context so I can blend them together CGContextRef context UIGraphicsGetCurrentContext CGContextSetBlendMode context.. rect blendMode kCGBlendModeOverlay alpha 1.0 and this one needs a CGImage which I'm not sure how to make with the PNGs CGContextDrawImage context rect someCGImage So what am I missing These aren't being triggered by any interaction they just..
How can I skip compressing one PNG? http://stackoverflow.com/questions/2051947/how-can-i-skip-compressing-one-png this problem but it took long enough that I'm posting question answer here. The Xcode build process optimizes my PNGs when building. This isn't usually a problem but iTunesArtwork being processed in this way causes corrupts it so that iTunes..
How to reduce the size of my iPhone application? http://stackoverflow.com/questions/2490910/how-to-reduce-the-size-of-my-iphone-application to reduce the size of my iPhone application Alternative Titles to aid searches Compressing PNGs Reduce the size of an iPhone Archive .ipa Adding a build rule to compress images in Xcode iOS Apps can only be downloaded.. share improve this question PNG is really the best option for lossless image compression. You can optimize your PNGs for size using PNGOUT but may I inquire which files specifically are taking much space How does it compare to a non debug..
What are the sizes used for the iOS application splash screen? http://stackoverflow.com/questions/2634898/what-are-the-sizes-used-for-the-ios-application-splash-screen automatically so you don't have to program it which is really useful. I don't have it with me but you need different PNGs for the iPad with specific names. I googled iPad default png and got this info from the phunkwerks site iPad Launch Image..
UIImagePNGRepresentation issues? / Images rotated by 90 degrees http://stackoverflow.com/questions/3554244/uiimagepngrepresentation-issues-images-rotated-by-90-degrees sets a rotation flag in the EXIF data of the JPEG. If you save a UIImage as a JPEG it will set the rotation flag. PNGs do not support a rotation flag so if you save a UIImage as a PNG it will be rotated incorrectly and not have a flag set.. so if you save a UIImage as a PNG it will be rotated incorrectly and not have a flag set to fix it. So if you want PNGs you must rotate them yourself. I would call this a bug in the PNG saving function but that's just an opinion they should..
When to use PNG or JPG in iPhone development? http://stackoverflow.com/questions/3929281/when-to-use-png-or-jpg-in-iphone-development this question PNG's are pixel perfect non lossy and require very little extra CPU energy to display. However large PNGs may take longer to read from storage than more compressed image formats and thus be slower to display. JPG's are smaller..
Adding images to iPhone Simulator http://stackoverflow.com/questions/468879/adding-images-to-iphone-simulator Media DCIM 100APPLE and add IMG_nnnn.THM and IMG_nnnn.JPG. It doesn't matter if they are not JPEGs they can both be PNGs but it appears that both of them must be present for it to work. You may need to create DCIM if it doesn't already exist..
What are the dimensions, file types, and ppi resolution of an iOS app icon? http://stackoverflow.com/questions/475410/what-are-the-dimensions-file-types-and-ppi-resolution-of-an-ios-app-icon for marketing purposes. iphone ios icons share improve this question The icon should be a 57x57 pixel PNG. The PNGs generated by Apple have a PPI of 72.01 so I guess something in that range will work fine. Don't have a very high PPI else..
iPhone CGContextRef CGBitmapContextCreate unsupported parameter combination http://stackoverflow.com/questions/5545600/iphone-cgcontextref-cgbitmapcontextcreate-unsupported-parameter-combination But on my iPhone 3G iOS 3.2 the resizing and crop methods are not working for any picture the locally stored ones are PNGs . This is the console output Tue Apr 5 02 34 44 Andreis MacBook Pro.local Puzzle 12453 Error CGBitmapContextCreate unsupported..
Performing iPhone optimization on externally downloaded PNGs http://stackoverflow.com/questions/640909/performing-iphone-optimization-on-externally-downloaded-pngs iPhone optimization on externally downloaded PNGs When a PNG is added to an XCode iPhone project the compiler optimizes it using pngcrush. Once on the device the image's.. Once on the device the image's rendering performance is very fast. My problem is that my application downloads its PNGs from an external source at runtime from Picasa Web albums using the Google Data APIs . Unfortunately these images' performance..
Resizing an image with stretchableImageWithLeftCapWidth http://stackoverflow.com/questions/785986/resizing-an-image-with-stretchableimagewithleftcapwidth the sim . Also if I remove transparency from the image the artifacts go away. Update Some more weirdness. I was using PNGs before so I tried using a transparent gif instead. Using a GIF shows the artifact problem on the sim. Victory Found a solution..
Advice on speeding up OpenGL ES 1.1 on the iPhone http://stackoverflow.com/questions/1844765/advice-on-speeding-up-opengl-es-1-1-on-the-iphone the gl versions aren't too efficient. What about VBOs Update There are 8260 triangles. Texture sizes are 64x64 pngs. There are 58 different textures. I have not run instruments. Update 2 After running the OpenGL ES Instrument on the iPhone..
Batch optimization of PNGs for iphone/ipad display as xcode does http://stackoverflow.com/questions/4584467/batch-optimization-of-pngs-for-iphone-ipad-display-as-xcode-does viewer for ipad and I'm struggling with the performance. I figured out that the most expensive part of displaying the pngs is the loading process. I know that xcode is able to optimize pngs during the build and such images are loaded much faster... out that the most expensive part of displaying the pngs is the loading process. I know that xcode is able to optimize pngs during the build and such images are loaded much faster. But I can't include all images in to the build as it will be huge... an arbitrary png without including it in the build process Do you know what is the best format for iphone I think that pngs should use RGB 8888 color scheme but I'm not sure what else is important. Maybe you know exact params for imagemagick iphone..
Two targets with separate .xib (image resources with same names) http://stackoverflow.com/questions/8878357/two-targets-with-separate-xib-image-resources-with-same-names a better answer . When you want to edit .xib of one target you remove the references of the other targets' resources pngs . Then you quit xcode and open your project again. The pngs will be the right ones since xcode doesn't hold references to.. you remove the references of the other targets' resources pngs . Then you quit xcode and open your project again. The pngs will be the right ones since xcode doesn't hold references to the wrong ones at the moment . When you're done reimport deleted..
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