sekati

# xcode-build-bump.sh
# @desc Auto-increment the build number every time the project is run. 
# @usage
# 1. Select: your Target in Xcode
# 2. Select: Build Phases Tab
# 3. Select: Add Build Phase -> Add Run Script
# 4. Paste code below in to new "Run Script" section
# 5. Drag the "Run Script" below "Link Binaries With Libraries"
# 6. Insure that your starting build number is set to a whole integer and not a float (e.g. 1, not 1.0)

iwasrobbed

- (void)controllerWillChangeContent:(NSFetchedResultsController *)controller
{
    self.shouldReloadCollectionView = NO;
    self.blockOperation = [[NSBlockOperation alloc] init];
}

- (void)controller:(NSFetchedResultsController *)controller didChangeSection:(id<NSFetchedResultsSectionInfo>)sectionInfo
           atIndex:(NSUInteger)sectionIndex forChangeType:(NSFetchedResultsChangeType)type
{
    __weak UICollectionView *collectionView = self.collectionView;

m1entus

// http://stackoverflow.com/questions/17535918/aes-gets-different-results-in-ios-and-java

- (NSData *)AES256EncryptWithKey:(NSString *)key {
    // 'key' should be 32 bytes for AES256, will be null-padded otherwise
    char keyPtr[kCCKeySizeAES256+1]; // room for terminator (unused)
    bzero(keyPtr, sizeof(keyPtr)); // fill with zeroes (for padding)
    
    // fetch key data
    [key getCString:keyPtr maxLength:sizeof(keyPtr) encoding:NSUTF8StringEncoding];
    

lexrus

• Array 是 value type，使用 structs 实现
• 数据类型没有隐式转换
• 对于 String，count() 的复杂度是 O(n)，每一个 Character 都是 unicode scalars 的序列
• raw values 和 associated values 的区别
• 如果必要，对于实现了 _ObjectiveCBridgeable 的 value types 会被自动桥接成 reference types
• 讲一下 unowned 和 weak 的区别
• 改 struct 的属性的方法名前要加 mutating，但如果这个 struct 用 let 声明的，改不了。修正：网友指出用 nonmutating set 也可以改属性。
• nil 和 .None 的区别
• capture list in closure
• 举一个 guard ... where 的例子

jasonbekolay

# In the command line, find the PID of your simulator process:
ps -p `pgrep launchd_sim`

# or if you have many simulators running:
ps -A | grep launchd_sim

# Find the PID of the WebContent process:
pgrep -P <simulator-pid> 'com.apple.WebKit.WebContent'

# kill it