2014/10/15 下午 10:13:24

iphone Programming Glossary: ret

Where should I save data & files I want to keep long term, and how do I prevent iCloud from backing them up

http://stackoverflow.com/questions/12371321/where-should-i-save-data-files-i-want-to-keep-long-term-and-how-do-i-prevent

is that this directory doesn't always exist and thus you may need to create it NSString applicationAppSupportDirectory return NSSearchPathForDirectoriesInDomains NSApplicationSupportDirectory NSUserDomainMask YES lastObject NSFileManager manager.. self applicationAppSupportDirectory if manager fileExistsAtPath appSupportDir __autoreleasing NSError error BOOL ret manager createDirectoryAtPath appSupportDir withIntermediateDirectories NO attributes nil error error if ret NSLog @ ERROR.. BOOL ret manager createDirectoryAtPath appSupportDir withIntermediateDirectories NO attributes nil error error if ret NSLog @ ERROR app support @ error exit 0 Files saved to this directory or subdirectories need an extended attribute to..

deep mutable copy of a NSMutableDictionary

http://stackoverflow.com/questions/1950361/deep-mutable-copy-of-a-nsmutabledictionary

Here's what I saw in a book but I'm not sure if it works NSMutableDictionary mutableDeepCopy NSMutableDictionary ret NSMutableDictionary alloc initWithCapacity self count NSArray keys self allKeys for id key in keys id oneValue self valueForKey.. alloc initWithCapacity self count NSArray keys self allKeys for id key in keys id oneValue self valueForKey key should return the array id oneCopy nil if oneValue respondsToSelector @selector mutableDeepCopy oneCopy oneValue mutableDeepCopy .. @selector mutableCopy oneCopy oneValue mutableCopy if oneCopy nil not sure if this is needed oneCopy oneValue copy ret setValue oneCopy forKey key oneCopy release return ret should the onecopy release be there or not Here's how I'm going to..

how to do true deep copy for NSArray and NSDictionary with have nested arrays/dictionary?

http://stackoverflow.com/questions/5453481/how-to-do-true-deep-copy-for-nsarray-and-nsdictionary-with-have-nested-arrays-di

objectAtIndex i if obj respondsToSelector @selector deepCopy cArray i obj deepCopy else cArray i obj copy NSArray ret NSArray arrayWithObjects cArray count count retain The newly created array retained these so now we need to balance the.. deepCopy cArray i obj deepCopy else cArray i obj copy NSArray ret NSArray arrayWithObjects cArray count count retain The newly created array retained these so now we need to balance the above copies for unsigned int i 0 i count i cArray.. deepCopy else cArray i obj copy NSArray ret NSArray arrayWithObjects cArray count count retain The newly created array retained these so now we need to balance the above copies for unsigned int i 0 i count i cArray i release return ret NSMutableArray..

canonical way to randomize an NSArray in Objective C

http://stackoverflow.com/questions/791232/canonical-way-to-randomize-an-nsarray-in-objective-c

n. There's probably a faster solution than this loop but bit twiddling isn't my specialty. do m 1 while m n NSUInteger ret do ret random m while ret n return ret @implementation NSMutableArray ArchUtils_Shuffle void shuffle http en.wikipedia.org.. probably a faster solution than this loop but bit twiddling isn't my specialty. do m 1 while m n NSUInteger ret do ret random m while ret n return ret @implementation NSMutableArray ArchUtils_Shuffle void shuffle http en.wikipedia.org wiki.. solution than this loop but bit twiddling isn't my specialty. do m 1 while m n NSUInteger ret do ret random m while ret n return ret @implementation NSMutableArray ArchUtils_Shuffle void shuffle http en.wikipedia.org wiki Knuth_shuffle for..

Internal clock in iPhone background mode

http://stackoverflow.com/questions/9564823/internal-clock-in-iphone-background-mode

need to get the correct time to use in my app so that i am running this internal clock. I can use NSDate but that will return the device time. Anyone can change the device time. So once somebody chaged wrong time will affect the smooth functioning.. happen sometime after it's locked the internal CPU clock stops ticking and mach_absolute_time won't update either. Theoretically it will return the exact same value if you call it right before the device went to sleep and after it awakes. The.. it's locked the internal CPU clock stops ticking and mach_absolute_time won't update either. Theoretically it will return the exact same value if you call it right before the device went to sleep and after it awakes. The best available way..