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How do I create delegates in Objective-C?
...his:
@interface MyClass<UIWebViewDelegate>
// ...
@end
@implementation MyClass
- (void)webViewDidStartLoad:(UIWebView *)webView {
// ...
}
@end
Then you could create an instance of MyClass and assign it as the web view's delegate:
MyClass *instanceOfMyClass = [[MyClass alloc] init];...
Is there a unique Android device ID?
...
Be aware there are huge limitations with this solution: android-developers.blogspot.com/2011/03/…
– emmby
Apr 7 '11 at 20:10
37
...
Swift native base class or NSObject
... is a super-class (directly or further up), or by using the '@objc' decoration. Otherwise it will follow a static- and vtable-dispatch style, like C++.
...
Bundle ID Suffix? What is it?
I'm new to the iPhone submission process. Apple asks for the Bundle ID Suffix. What is this? Not sure what to put here and what the significance of it is.
...
What is the official “preferred” way to install pip and virtualenv systemwide?
...lease notes):
Beginning with v1.5.1, pip does not require setuptools prior to running get-pip.py. Additionally, if setuptools (or distribute) is not already installed, get-pip.py will install setuptools for you.
I now run the regular:
curl --silent --show-error --retry 5 https://bootstrap.pyp...
How to generate a Dockerfile from an image?
...ockerfile-from-image"
$ dfimage --help
Usage: dockerfile-from-image.rb [options] <image_id>
-f, --full-tree Generate Dockerfile for all parent layers
-h, --help Show this message
...
Why is XOR the default way to combine hashes?
...
In spite of its handy bit-mixing properties, XOR is not a good way to combine hashes due to its commutativity. Consider what would happen if you stored the permutations of {1, 2, …, 10} in a hash table of 10-tuples.
A much better choice is m * H(A)...
How to serialize a lambda?
...
Java 8 introduces the possibility to cast an object to an intersection of types by adding multiple bounds. In the case of serialization, it is therefore possible to write:
Runnable r = (Runnable & Serializable)() -> System.out.println("Serializable!");
And the lambda automagically ...
How to add a touch event to a UIView?
...
In iOS 3.2 and higher, you can use gesture recognizers. For example, this is how you would handle a tap event:
//The setup code (in viewDidLoad in your view controller)
UITapGestureRecognizer *singleFingerTap =
[[UITapGestur...
FFmpeg on Android
... compiled (libffmpeg.so) on Android. Now I have to build either an application like RockPlayer or use existing Android multimedia framework to invoke FFmpeg.
...