Does UIGraphicsBeginImageContext
use CGBitmapContextCreate
to create a graphics context [update: I can't find it in the documentation], so the graphics context is exactly the same either way? I also tried to step into UIGraphicsBeginImageContext
but the debugger won't let me step into it.
Is it certain that UIGraphicsBeginImageContext use CGBitmapContextCreate to create the graphics context?
839 Views Asked by nonopolarity At
1
There are 1 best solutions below
Related Questions in IOS
- Overlapping UICollectionView in storyboard
- Cannot pod spec lint because of undeclared type errors
- Swift code with multiple NSDateFormatter - optimization
- How do I add multiple in app purchases in Swift Spritekit?
- cellForRowAtIndexPath and prepareForSegue return different label colors
- Getting this message in my console in xcode "Ignoring restoreCompletedTransactionsWithApplicationUsername: because already restoring transactions"?
- Change background of an Accessory View in a UITableViewCell
- fade in an bounce animation subview
- Create a PFObject and PFRelation after PFUser Sign Up
- Swift 2 - Pattern matching in "if"
Related Questions in COCOA-TOUCH
- Overlapping UICollectionView in storyboard
- Cannot pod spec lint because of undeclared type errors
- Swift code with multiple NSDateFormatter - optimization
- How do I add multiple in app purchases in Swift Spritekit?
- cellForRowAtIndexPath and prepareForSegue return different label colors
- Getting this message in my console in xcode "Ignoring restoreCompletedTransactionsWithApplicationUsername: because already restoring transactions"?
- Change background of an Accessory View in a UITableViewCell
- fade in an bounce animation subview
- Create a PFObject and PFRelation after PFUser Sign Up
- Swift 2 - Pattern matching in "if"
Related Questions in UIKIT
- Overlapping UICollectionView in storyboard
- Cannot pod spec lint because of undeclared type errors
- Swift code with multiple NSDateFormatter - optimization
- How do I add multiple in app purchases in Swift Spritekit?
- cellForRowAtIndexPath and prepareForSegue return different label colors
- Getting this message in my console in xcode "Ignoring restoreCompletedTransactionsWithApplicationUsername: because already restoring transactions"?
- Change background of an Accessory View in a UITableViewCell
- fade in an bounce animation subview
- Create a PFObject and PFRelation after PFUser Sign Up
- Swift 2 - Pattern matching in "if"
Related Questions in CORE-GRAPHICS
- Overlapping UICollectionView in storyboard
- Cannot pod spec lint because of undeclared type errors
- Swift code with multiple NSDateFormatter - optimization
- How do I add multiple in app purchases in Swift Spritekit?
- cellForRowAtIndexPath and prepareForSegue return different label colors
- Getting this message in my console in xcode "Ignoring restoreCompletedTransactionsWithApplicationUsername: because already restoring transactions"?
- Change background of an Accessory View in a UITableViewCell
- fade in an bounce animation subview
- Create a PFObject and PFRelation after PFUser Sign Up
- Swift 2 - Pattern matching in "if"
Related Questions in GRAPHICSCONTEXT
- Overlapping UICollectionView in storyboard
- Cannot pod spec lint because of undeclared type errors
- Swift code with multiple NSDateFormatter - optimization
- How do I add multiple in app purchases in Swift Spritekit?
- cellForRowAtIndexPath and prepareForSegue return different label colors
- Getting this message in my console in xcode "Ignoring restoreCompletedTransactionsWithApplicationUsername: because already restoring transactions"?
- Change background of an Accessory View in a UITableViewCell
- fade in an bounce animation subview
- Create a PFObject and PFRelation after PFUser Sign Up
- Swift 2 - Pattern matching in "if"
Trending Questions
- UIImageView Frame Doesn't Reflect Constraints
- Is it possible to use adb commands to click on a view by finding its ID?
- How to create a new web character symbol recognizable by html/javascript?
- Why isn't my CSS3 animation smooth in Google Chrome (but very smooth on other browsers)?
- Heap Gives Page Fault
- Connect ffmpeg to Visual Studio 2008
- Both Object- and ValueAnimator jumps when Duration is set above API LvL 24
- How to avoid default initialization of objects in std::vector?
- second argument of the command line arguments in a format other than char** argv or char* argv[]
- How to improve efficiency of algorithm which generates next lexicographic permutation?
- Navigating to the another actvity app getting crash in android
- How to read the particular message format in android and store in sqlite database?
- Resetting inventory status after order is cancelled
- Efficiently compute powers of X in SSE/AVX
- Insert into an external database using ajax and php : POST 500 (Internal Server Error)
Popular # Hahtags
Popular Questions
- How do I undo the most recent local commits in Git?
- How can I remove a specific item from an array in JavaScript?
- How do I delete a Git branch locally and remotely?
- Find all files containing a specific text (string) on Linux?
- How do I revert a Git repository to a previous commit?
- How do I create an HTML button that acts like a link?
- How do I check out a remote Git branch?
- How do I force "git pull" to overwrite local files?
- How do I list all files of a directory?
- How to check whether a string contains a substring in JavaScript?
- How do I redirect to another webpage?
- How can I iterate over rows in a Pandas DataFrame?
- How do I convert a String to an int in Java?
- Does Python have a string 'contains' substring method?
- How do I check if a string contains a specific word?
In the UIKit Function References page of iOS documentation, the following is written about
UIGraphicsBeginImageContext
:Emphasis added. Following a link to the CGContextRef page, I find this:
Again, emphasis added. This says that (as of now) there are 4 kinds of Core Graphics contexts, each with their own initializers. The only kind that has to do with bitmaps is a bitmap-based CGContextRef, and there is only one documented way to create them (well, technically it comes in two versions). It is very likely that this function is being used. I believe that
UIGraphicsBeginImageContext
is merely a convenience method. It just sets up a default set of parameters for CGBitmapContextCreate (it takes a lot of parameters) and pushes the created context onto the graphics stack.