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CGContextDrawImage draws image upside down when passed UIImage.CGImage
...e of your begin/end CGcontext methods.
This will draw the image with the correct orientation into your current image context - I'm pretty sure this has something to do with the UIImage holding onto knowledge of the orientation while the CGContextDrawImage method gets the underlying raw image data w...
How to @link to a Enum Value using Javadoc
...
The # style works for me:
{@link Planet#EARTH}
The key is that the Planet package must be imported, or Planet must be fully qualified - i.e.:
{@link com.yourpackage.Planet#EARTH}
...
Debugging automatic properties
... 2012, 2013:
Go to the Breakpoint window
New -> Break at Function…
For the get, type: ClassName.get_Counter()
For the set, type: ClassName.set_Counter(int)
You'll get a "No Source Available" when the breakpoint is hit, but you'll get the calling location in the call stack.
I found this so...
Is it possible to Turn page programmatically in UIPageViewController?
...tion:(void (^)(BOOL finished))completion;`
That is the same method used for setting up the first view controller on the page. Similar, you can use it to go to other pages.
Wonder why viewControllers is an array, and not a single view controller?
That's because a page view controller could have a...
What is the proper way to URL encode Unicode characters?
...ng:
The generic URI syntax mandates that new URI schemes that provide for the representation of character data in a URI must, in effect, represent characters from the unreserved set without translation, and should convert all other characters to bytes according to UTF-8, and then percent-encode ...
Android Emulator: Installation error: INSTALL_FAILED_VERSION_DOWNGRADE
... with the same packageName as an app that's already installed on the emulator, but the one you're trying to install has a lower versionCode (integer value for your version number).
You might have installed from a separate copy of the code where the version number was higher than the copy you're wor...
Sending a message to nil in Objective-C
... out all of the elements in an ArrayList:
void foo(ArrayList list)
{
for(int i = 0; i < list.size(); ++i){
System.out.println(list.get(i).toString());
}
}
Now, if you call that method like so: someObject.foo(NULL); you're going to probably get a NullPointerException when it tri...
How do I retrieve an HTML element's actual width and height?
... have a <div> that I wish to center in the browser's display (viewport). To do so, I need to calculate the width and height of the <div> element.
...
Git: Create a branch from unstaged/uncommitted changes on master
Context: I'm working on master adding a simple feature. After a few minutes I realize it was not so simple and it should have been better to work into a new branch.
...
How to determine if a process runs inside lxc/Docker?
...whether they run inside a virtual machine, is something similar available for lxc/docker?
15 Answers
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