Every day during iOS development we are using Xcode' threads/queue view of the debug navigator to examine stack frames, switch between them and po, etc. vars and expressions. But I don't really understand all the icons (legend) in this window. I only know that blue-tinted icons show live stack frames and grey ones show recorded (historical) frames. But what each specific icon represents. I attached screenshots with different icons:
And another one:
As you can see each frame has it's own icon. I guess user image means user code(or not??), also there is an icon of a gear wheel, a mug(cup), a brick wall icon and a suitcase icon on the second screenshot.
Can someone point me to the doc where all these icons and their meanings are explained or if no such doc exists then explain what do they mean.
You can find answer in apple docs: https://developer.apple.com/library/content/documentation/DeveloperTools/Conceptual/debugging_with_xcode/chapters/debugging_tools.html#//apple_ref/doc/uid/TP40015022-CH8-SW19
It's icons for different process. You can see more here https://developer.apple.com/library/content/documentation/DeveloperTools/Conceptual/debugging_with_xcode/chapters/debugging_tools.html#//apple_ref/doc/uid/TP40015022-CH8-SW19
A couple weeks ago I remember seeing a very cool and easy trick to add images to an array. The trick was after you create an array a view pops up next to it and you select the images and they appear in your array. However now I can't find how to do it.
Found what I was looking for.
var imageArray: [UIImage] = [Image Lateral]
After you write "Image Lateral" in the brackets the photos menu pops up.
I've got my workspace windows set up like this:
Then I Navigate away from my story board to replace the left window with some code so i Can compare two code documents like this:
When I navigate back to my storyboard, it resets the document outline column to this:
How the frak do I configure window sizing presets? Coming from an Adobe background I'm used to having a preference somewhere that allows me to save interface layouts and sizing presets. The closest thing I can find is "behaviors", but this doesn't seem to control the sizing of columns and windows.
Seems like the best way to handle this is by using "Tabs"
I found this very helpful blog post.
I love using the Xcode debugger. You can take a look at a variable's value and even change it.
But can I somehow DISPLAY the image that is referenced by an image variable? I know I can see its raw bytes, but it would be much more human-friendly to display a window with its contents.
Xcode might not support this. Maybe there is an external tool that would help display images?
Use Quick Look to inspect images in the Xcode debugger.
Select an NSImage or UIImage in the debugger, then click the Quick Look "eye" icon.
Like other areas of OS X, you can also use spacebar to Quick Look!
Quick Look in the debugger can also be implemented for your own classes:
Enabling Quick Look for Custom Types
The variables Quick Look feature in the Xcode debugger allows you to obtain a quick visual assessment of the state of an object variable through a graphical rendering, displayed in a popover window either in the debugger variables view or in place in your source code.
This chapter describes how you implement a Quick Look method for your custom class types so that object variables of those types can also be rendered visually in the Quick Look popover window.
If you like to work with the lldb console, use chisel command "visualize"
tip:
after the installation, you can set a conditional breakpoint after setting the UIImage with the action:
"visualize myUIImageToShowWithQuickLook"
this will show you the image automatically when the debugger stops.
EDIT:
As of Xcode 5, the debugger can show you the visual representation of UIImage/CGImageRef variables!
Xcode itself can't do it. I don't know about external tools.
What i'm doing to test images while debugging is to convert that raw data into an image-file format, like .png, and then saving it somewhere, and then i'm opening the image with any image viewing tool.
I have a piece of code for that purpose, which look basically like that:
NSData *imageData = UIImagePNGRepresentation(self.myUIImage);
[imageData writeToURL:desktopURL atomically:YES];
And i'm just copy-pasting this code where i want to see content of an image on the run.
Make sure to get rid of this code as soon as possible due to the high-cost of the conversion of UIImage to NSData
Edit for Xcode 5: Now when you hover over an image variable name, there is an "eye" icon on the right. Just click it to see the current image!
NOTE: sometimes this fails in Xcode, even if the image is correct. If this happens, OR if you don't have a UIImage variable (e.g. it's a property of another object, you can still use the older answer:
Older answer: Starting with Avraham's answer, I tried a few experiments for displaying an iOS image from lldb without having to recompile or add it to a view. I finally came up with:
e [UIImagePNGRepresentation(myImage) writeToFile:#"/Users/<userName>/Desktop/myImage.png" atomically:NO];
I keep this string in a text editor and paste it when I need it. This stores the current image I'm interested in (in this case, "myImage") to a PNG file on the Desktop. Then I can just open this file with Preview.
If you're working on an iOS device, then you can use
e [UIImagePNGRepresentation(myImage) writeToFile:[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)[0] stringByAppendingString:#"/myImage.png"] atomically:NO];
Then you can use the Finder; select your device; "Files"; then your dev app, and copy the image to your Desktop to view it.
What if you can't get to the image via the variables view?
Echoing what #pkamb said - you can use the variables view to quick look at an image. But what if you can't get to the image?
for example I have an image at (contentViewController.view.subviews[0].subviews[1] as? UIImageView).image
but if I try to expand contentViewController in the variable view it doesn't expose my subviews
what you can do is right click, add an expression, and then you can see it!
Click the eye icon when hovering over a variable in Xcode:
You can put a breakpoint in the line of your image, and then in the debugger, just write:
po your_UIImage_object
po stands for print object, it's a GDB command which will display several useful informations about the object passed, in your case the image.
I want to set the images in my outline view to the system icons, just like on the left in the Finder. I want to get icons like Application, Documents, Desktop, etc. How do I do this?
Use NSWorkspace's iconForFile: method
NSImage *icon = [[NSWorkspace sharedWorkspace] iconForFile:#"/Applications/"];
edit:
take a look at these files, are they what you're after? Your question is a little hard to understand
$ ls /System/Library/CoreServices/CoreTypes.bundle/Contents/Resources/Toolbar*FolderIcon.icns
/System/Library/CoreServices/CoreTypes.bundle/Contents/Resources/ToolbarAppsFolderIcon.icns
/System/Library/CoreServices/CoreTypes.bundle/Contents/Resources/ToolbarDesktopFolderIcon.icns
/System/Library/CoreServices/CoreTypes.bundle/Contents/Resources/ToolbarDocumentsFolderIcon.icns
/System/Library/CoreServices/CoreTypes.bundle/Contents/Resources/ToolbarDownloadsFolderIcon.icns
/System/Library/CoreServices/CoreTypes.bundle/Contents/Resources/ToolbarLibraryFolderIcon.icns
/System/Library/CoreServices/CoreTypes.bundle/Contents/Resources/ToolbarMovieFolderIcon.icns
/System/Library/CoreServices/CoreTypes.bundle/Contents/Resources/ToolbarMusicFolderIcon.icns
/System/Library/CoreServices/CoreTypes.bundle/Contents/Resources/ToolbarPicturesFolderIcon.icns
/System/Library/CoreServices/CoreTypes.bundle/Contents/Resources/ToolbarPublicFolderIcon.icns
/System/Library/CoreServices/CoreTypes.bundle/Contents/Resources/ToolbarSitesFolderIcon.icns
/System/Library/CoreServices/CoreTypes.bundle/Contents/Resources/ToolbarUtilitiesFolderIcon.icns
There's a method in NSWorkspace that allows you to set custom icons to folders and files:
- (BOOL)setIcon:(NSImage *)image forFile:(NSString *)fullPath
options:(NSWorkspaceIconCreationOptions)options
Sets the icon for the file or directory at the specified path.
Use -[NSWorkspace iconForFileType:], and pass constants from IconsCore.h (filtered through NSFileTypeForHFSTypeCode, of course).
This article on Creating icns Icon Files should cover what you want to do. There is also an article on creating an icon so that it looks similar to the standard folder icon, which is good for consistency. Hope that helps.
Of course, this isn't really programming related.