2014/10/15 下午 10:14:41

iphone Programming Glossary: sy

Undefined symbols for architecture armv7: “_SCNetworkReachabilityCreateWithAddress”

http://stackoverflow.com/questions/10930156/undefined-symbols-for-architecture-armv7-scnetworkreachabilitycreatewithaddre

found for architecture armv7 clang error linker command failed with exit code 1 use v to see invocation I have added SystemConfiguration.framework and it doesn't seem to want to do anything with it as this error just won't go away. I have looked.. ignoring file Applications Xcode.app Contents Developer Platforms iPhoneOS.platform Developer SDKs iPhoneOS5.1.sdk System Library Frameworks SystemConfiguration.framework SystemConfiguration missing required architecture armv7 in file EDIT.. Xcode.app Contents Developer Platforms iPhoneOS.platform Developer SDKs iPhoneOS5.1.sdk System Library Frameworks SystemConfiguration.framework SystemConfiguration missing required architecture armv7 in file EDIT Right Thanks to @gaige I..

obtaining the rotation and size of a UIImageView based on its transformation matrices

http://stackoverflow.com/questions/1379811/obtaining-the-rotation-and-size-of-a-uiimageview-based-on-its-transformation-mat

out how to extract the scale factors and rotations analytically. A scaling matrix to scale by Sx in the X axis and Sy in the Y axis looks like this ﹖x 0 Sy A matrix to rotate clockwise by R radians looks like this ︷os R sin R sin R cos R.. and rotations analytically. A scaling matrix to scale by Sx in the X axis and Sy in the Y axis looks like this ﹖x 0 Sy A matrix to rotate clockwise by R radians looks like this ︷os R sin R sin R cos R Using standard matrix multiplication the.. R Using standard matrix multiplication the combined scaling and rotation matrix will look like this ﹖x.cos R Sx.sin R Sy.sin R Sy.cos R Note that linear transformations could also include shearing or other transformations but I'll assume for..