I have to take some long code that I wrote when I didn't know too much and change all the hard-coded numbers to something else .
The numbers are positions on screen, and now I need to make them relative to screen size.
So every 160 on code should turn into winSize.width/2, and 80 = winSize.width/4.
Is there a simple way to do that in Xcode?
Press
Command+F
when you are ion the file which needs changes.
You will see a bar at the top. On left side there is Find written. Click on it. Yoy will get an option Replace.
Choose Replace.
In String Matching write 160.
In below filed write winSize.width/2. Click on Replace All button.
Do it for value 80 as well.
Or Right Click -> Refactor... -> Rename also works as well as F&R. It gives you an automatic diff like preview of the changes as well, which I think F&R does but you have to click an additional button to get at it.
You can use the Find and Replace from the Project Navigator view
Related
I want to add another option when right clicking on MATLAB workspace items. I would like imshow to also appear in the menu:
You have to dig a little more. Those options displayed are what people frequently use when deciding to plot a 2D matrix. If your desired option isn't there, you have to go to Plot Catalog... (very last option at the bottom of the pop-up menu in your image) and choose the plot you want. In your case, you have to go to Image Plots, then choose the rig
Here's the window I get when I load up the onion.png image that's part of the image processing toolbox:
im = imread('onion.png');
The last option is imshow, which is what you need. However, I think this is more invasive than just typing in imshow(im); or whatever the variable name is called. You can also get MATLAB to autocomplete the variable by using TAB in the Command Prompt to save time. I personally think it's more quicker to type it in rather than having to wait for the Plot Catalog window to open.... then again, that's just me.
I think I found a workaround for that. On the Plots tab, right clicking on the imshow function lets me add it to the quick access toolbar. now I simply click on the variable on workspace and then press alt + 1 and Voila ! :)
I have been developing in zend studio and there is a feature I miss a lot in Xcode. When you are reading code in a main function and you want to go in a specific function to read something, you can click in the left area of your current line of code were your are, and a flag-mark appears in that line of code, so you can go anywere else in the code and it will be very easy to come back to that line of code you were before because there is a flag and you only have to click on it and you automatically go back. Does Anybody know a similar way to do this in Xcode?
Unfortunately, this feature was present in earlier versions of Xcode (up to Xcode3 IIRC) and was called "Bookmarks", but it was removed since then.
You can use breakpoints (and disable them) as a workaround, even if it's not perfect. I personally prefer using other tricks, like "Open Quickly" and named tabs.
Alternate trick 1 : "Open Quickly"
One trick is to use Command+Shift+O (or "File" menu > "Open Quickly") to quickly open a file. In the field that appears, you can type:
The name or parts of the name of a file.
Typing "MainViewController" will propose to jump to the MainViewController.h or MainViewController.m file.
Typing "MainVC" will work too, as well as "MainViewCtrl", as long as the order of the letters you type is the same as the full name.
Very handy to just type "ContTVCell" to open the ContactsTableViewCell.h file that is hidden deep in subgroups of my project for example
Similarly, you may also type the name or parts of the name of a symbol, especially a method name.
For example, typing tvcellforrow will list you all the definitions of -tableView:cellForRowAtIndexPath: it could find in your project and let to jump to the one you want
When typing (parts of) the name of a file, adding : followed by a number at the end will allow you to directly jump at the corresponding line
For example, typing mvc:50 will propose you to jump to line 50 of MainViewController.h or MainViewController.m
Another trick : using (named) tabs
Don't forget that you can open tabs in Xcode, which can be very handy in this kind of situation.
When you are editing a file at some interesting position, you can create a new tab to browse elsewhere and go at any other place… and then go back to your first tab to find the code where you left it at the time you switched to the other tab.
Don't forget that you can name your tabs (simply double-click on their title) to give them a more explicit title. You may then quite think of them as "named bookmarks" somehow
Likewise, don't forget that you can detach tabs in separate windows too, if you prefer (for example to keep them around and visible on your secondary screen while you edit another part of your code)
You can even combine this with the "Open Quickly" trick presented above: once you made the "Open Quickly" field appear and typed something into it, instead of just validating using the enter key:
use Alt+Shift+enter to let Xcode present you a small widget that let you choose where you want the file to open (in the current tab, in another tab, in the assistant editor, in a dedicated window…)
use Alt+enter to open the file using the alternate navigation defined in Xcode preferences (Xcode > Preferences > Navigation > Optional Navigation). By default, the behavior when opening a file while using the Alt key is to open the file in the Assistant Editor. Personally I changed that in my Xcode preferences as I prefer to make Xcode open the file in a separate tab instead, which makes Alt+clic much more useful.
Sure, all those tricks with "Open Quickly…" and "Tabs" do not replace the bookmarks feature that you are missing. But they are still nice alternate ways to jump quickly to any position in your code, even any specific line of any specific file in your project, wherever you are in Xcode (even without having to have the Project Navigator visible on the left part of your window), and let you have multiple editors in different tabs to go quickly back to a part of interest in your code
its on top of your editor i have added two pics just check them.
When you navigate to another place in Xcode, say, open a different file, or Command-click and jump to definition, you can go forward and back by swiping right or left on the trackpad with two fingers.
You can also use keyboard shortcuts: Ctrl+⌘+→ to go forward, or Ctrl+⌘+← to go back.
Finally, you can click triangular buttons at the top left in your edit area.
There is a go back button at the top left of the editor!
If that is not good enough, whar I do is misuse breakpoints to set flags in my code. The breakpoint navigator thus becomes a table of flags. It isn't much but there you are.
In Xcode 3 I use to be able to select some text, right click and search for that text.
However in Xcode 4 this seems to have disappeared ?
Is there a quick alternative instead ?
EDIT
I'd select some source code and it would find all occurences in the rest of the source code.
Select text; cmd-E
Then Shift-cmd-F; return
Boom.
Select your text, hit command-E ("use selection for find") and command-G to iterate through results.
Find in Workspace appears to be fundamentally broken in Xcode 4.
Someone else posted a workaround: toggle the Assistant Editor button to enable the menu item. However it still is not available for text in the debug output area.
Search in workspace (you can read the keyboard abbreviation in Edit -> Find -> find in workspace
You can always try some keyboard shortcuts combination once your text is selected:
command+C
command+F (if you want to
search in the current file, otherwise
shift+command+F to look into the
whole project)
command+V
Then you can iterate through the results with command+G to go forward or shift+command+G to go backward.
Hope this helps.
It'd be really handy to have collection KVC accessor snippets in xcode, as they're a pain to do by hand. Has anyone who's been using 4 for a while worked out how to add new ones?
(...we're allowed to talk about it now, right?)
Yes, it's quite easy - you just highlight text you want to use as a snippet and drag it into the snippets area (dragging selected text can be difficult, I find it works better if you drag from the left edge of the editor). It brings up a dialog box asking you to name it.
Also, you can have custom parameters in snippets - if you put the text <#paramName#> anywhere in the code you are dragging, when you use the snippet it will come up as a replaceable parameter that you can tab between just like in the official Snippets.
Also make sure to set a completion prefix, which makes it shorter to activate the snippet as you are typing. The nice thing about using Snippets over other solutions like global system text expanders, is that snippets can also be limited to being valid in a certain area of code - so for example a snippet that filled out a string formatting line can be marked as valid only within a block, not outside a method. That way the completion prefix only hits in areas where it's valid to use.
You can edit a snippet by clicking once on it, a box will come up with the snippet text and some other snippet settings you can edit.
A tip to help you drag the code every time, select text then click + hold (do not move mouse) until mouse pointer changes from "I" to pointer. You'll then be able to drag the selected text to the Code Snippet Library.
Drag the highlighted code to the Snippet library. (It can be stubborn and not want to drag. Holding the mouse button down for a moment before dragging seems to help.)
You can use Snippets to manage code snippets in Xcode. Check out this demo http://www.youtube.com/watch?v=il4kE4diy0k
Simply select the code, the press ALT key and drag it into the code snippets library and rename it there, Make sure to press the ALT key, other than this you won'n be able to drag it.
Often, when I am reading code or debugging, I want the ability to quickly jump around files. I especially want to "go back" to where I was. I know about "Command+T", "Command+Shift+T", and, bookmarks. But, I cannot figure out a way to jump around files quickly.
UPDATE: I do not think I my question was clear enough judging by two answers given. Specifically, I am looking for a way to "jump back" to where I was in a file. I know how to navigate in TextMate (in general). I want to know if TextMate has a "jump back" key binding.
It's subtle.
The command-T thing has the files listed in Most Recently Used order.
So, you can go command-T return to get back to your last file real quick. At first I couldn't find it either.
I don't think there's a go to last edit location as there is in, say, IDEA/RubyMine.
Courtesy of MacroMates.com
2.3 Moving Between Files (With Grace)
When working with projects there are a few ways to move between the open files.
The most straightforward way is by clicking on the file tab you need. This can also be done from the keyboard by pressing ⌘1-9, which will switch to file tab 1-9.
You can also use ⌥⌘← and ⌥⌘→ to select the file tab to the left or right of the current one.
It is possible to re-arrange the file tabs by using the mouse to drag-sort them (click and hold the mouse button on a tab and then drag it to the new location). This should make it possible to arrange them so that keyboard switching is more natural.
One more key is ⌥⌘↑ which cycles through text files with the same base name as the current file. This is mainly useful when working with languages which have an interface file (header) and implementation file (source).
When you want to move to a file which is not open you can use the Go to File… action in the Navigation menu (bound to ⌘T). This opens a window like the one shown below.
Go To File
This window lists all text files in the project sorted by last use, which means pressing return will open (or go to) the last file you worked on. So using it this way makes for easy switching to the most recently used file.
You can enter a filter string to narrow down the number of files shown. This filter string is matched against the filenames as an abbreviation and the files are sorted according to how well they match the given abbreviation. For example in the picture above the filter string is otv and TextMate determines that OakTextView.h is the best match for that (by placing it at the top).
The file I want is OakTextView.mm which ranks as #2. But since I have already corrected it in the past, TextMate has learned that this is the match that should go together with the otv filter string, i.e. it is adaptive and learns from your usage patterns.
If you have a project window open, you can leave frequently-accessed files open (in tabs), and then use ⌘+1-9 to jump to open tabs.