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)The Circle-elipse problem (https://en.wikipedia.org/wiki/Circle-ellipse_problem is quite a big issue in object oriented programming languages, is there a way it can be solved in Swift, with protocols for example ?

In El Capitan 10.11 it is no more possible to add files in /usr because of the new security protection.I have seen the WWDC 2015 presentation « Security and Your Apps, Session 706 » that describes the new System Integrity Protection.Files from /usr should be moved to /sur/local. OK.Smart card reader drivers are located in /usr/libexec/SmartCardServices/drivers/. Apple only provides a CCID driver as ifd-ccid.bundle.How can I install a new smart card reader driver in El Capitan?

Hi everyone. This is my first post here on the forums because I am usually able to find answers to my problems somewhere. But for this particular one, I'm stuck wondering if anyone else has the same issue I do.With iOS 9, iPhone uses its ambient light and proximity sensors to detect if it's facedown, thus when a notification is received the display will not turn on. However, I haven't been able to get my iPhone to do this, but another dev friend of mine has. (My phone screen still fires up even when facedown.) I'm wondering what's different between the settings on our iPhones that he has this feature active and I don't. It's not a big deal, but I'm just curious because my Home & Lock Screen uses the most power % based on my battery breakdown.Maybe it's just a bug. Who knows.

Thank you.

I downloaded El Capitan Beta 2, and for some reason, I had to re-format the disk. Which is no big deal, because it is a knock-around partition, and I had nothing really valuable on it.Now when I go to re-download the beta on the developer website, and it opens in the App Store, and redeems the code, it tells me that This code has already been redeemed. I have tried to refresh the page in Safari, and tried it in a different browser (in case of cookies). I have no idea what is going on, or if other people have had this problem.Thanks in advance for any help!

1. As I understand if I fix the width and height of a UI element it can look really big on iPhone 4 and really small on iPhone 6 Plus. So is it better to use relation to the full screen via Equal Height and Equal Width? What do you usually do?2. If I have an image that is half width and half height size of iPhone 6 Plus screen (621x1104), and then use Equal Height and Equal Width and set it for example 0.5 of width and 0.5 of height of the main UIView, doesn't it mean that the picture will look perfect on iPhone 6 Plus but will be distorted on iPhone 4, because the relation between width and height are different on those devices? So how do you handle this situation?

My server devs ask me to send them some data encoded with base64 with this rules:1. big-endian byte order2. no extra zero bytes3. base64 stringfor example:10005000 → «mKol»1234567890 → «SZYC0g»I did some spaghetti code, and it's work. But maybe somebody have more elegant solution?+ (NSString*)encodeBigEndianBase64:(uint32_t)value { char *bytes = (char*) &value; int len = sizeof(uint32_t); char *reverseBytes = malloc(sizeof(char) * len); unsigned long index = len - 1; for (int i = 0; i < len; i++) reverseBytes[index--] = bytes[i]; int offset = 0; while (reverseBytes[offset] == 0) { offset++; } NSData *resultData; if (offset > 0) { int truncatedLen = (len - offset); char *truncateBytes = malloc(sizeof(char) * truncatedLen); for (int i = 0; i < truncatedLen ; i++) truncateBytes[i] = reverseBytes[i + offset]; resultData = [NSData dataWithBytes:truncateBytes length:truncatedLen]; free(truncateBytes); } else { resultData = [NSData dataWithBytes:reverseBytes length:len]; } free(reverseBytes); r

I was putting the final touches on my production build scripts when I discovered that the apps I'm producing won't run on some machines.My final build target builds that products for distribution (DEPLOYMENT_POSTPROCESSING=YES, Target=Deployment). These are then packaged in a disk image.I can open the disk image on my computer and run all of the apps. Note that some of the app bundles include privileged helper tools that must be correctly signed, and apparently they are because they get installed.I then copy the disk image to three other test systems (OS X 10.7, 10.9, and 10.10) and try to run them there. None of the apps will launch. I get a message that they are from an unidentified developer. (Note that all of these systems, including mine, only allow App Store and identified apps to be launched.)If I perform a codesign --verify or codesign --display -r- and dump the signing information for the apps, everything looks like it's been signed. (If I do the same to an Apple app like Numbers, I get a very simila