Xcode: How to change all fonts at once in an app? - iphone

Question

I was wondering if it was possible to change the fonts on about 100 different viewcontrollers all at once? It would be a lot eisier than going through one by one and changing them. Any ideas? Thank you!

Answer 1

The user interface files (*.xib) are plain text and you can load them into an editor.
In Xcode4 on the left pane you can right-click > open as > source.
This will give you the XML source any you can find/replace there.
Warning: doing something wrong may render the whole file useless, so unless you have source control anyway, make copies of the XIB before attempting changes.

Answer 2

you cant change all the fonts at once....
But i have find one more varient that will help you...
I have made some recursive functions thy can help you..
follow following steps..
First create a class(BaseViewController) extended from UIViewController like in BaseViewController.h file
#interface BaseViewController : UIViewController
And in BaseViewController.m file write following code.
- (void)viewDidLoad
{
[super viewDidLoad];
[self changeFontsOfViewController];
}
-(void)changeFontsOfViewController
{
UIViewController * vv = [self viewControllerOfView:self.view];
NSArray *objects = [[NSBundle mainBundle] loadNibNamed:NSStringFromClass([vv class]) owner:vv options:nil];
for (id object in objects)
{
[self changeFontOfView:object];
}
}
-(void)changeFontOfView:(UIView *)aView
{
for (UIView *vv in [aView subviews])
{
if ([vv isKindOfClass:[UIButton class]])
{
UIButton *btn = (UIButton *)vv;
CGFloat fontSize = btn.titleLabel.font.pointSize;
btn.titleLabel.font = [UIFont fontWithName:#"Helvetica-Bold" size:fontSize];
}
else if ([vv isKindOfClass:[UILabel class]])
{
UILabel *lbl = (UILabel *)vv;
CGFloat fontSize = lbl.font.pointSize;
[lbl setFont:[UIFont fontWithName:#"Helvetica-Bold" size:fontSize]];
}
else if ([vv isKindOfClass:[UITextView class]])
{
UITextView *txt = (UITextView *)vv;
CGFloat fontSize = txt.font.pointSize;
[txt setFont:[UIFont fontWithName:#"Helvetica-Bold" size:fontSize]];
}
else if ([vv isKindOfClass:[UITextField class]])
{
UITextField *txt = (UITextField *)vv;
CGFloat fontSize = txt.font.pointSize;
[txt setFont:[UIFont fontWithName:#"Helvetica-Bold" size:fontSize]];
}
else if ([vv isKindOfClass:[UIView class]]||[vv isKindOfClass:[UIScrollView class]])
{
if (aView.subviews.count == 0)return;
[self changeFontOfView:vv];
}
}
}
Now your every viewController(RootViewController) will be extended from BaseViewController class like in RootViewController.h..
#import "BaseViewController.h"
#interface RootViewController : BaseViewController
{
}
And make sure that you have written following in your .m file of your UIViewController(RootViewController.m)
- (void)viewDidLoad
{
[super viewDidLoad];
}
Please follow above steps carefully you will rock.......

Answer 3

How about this little recursive method on UIView?
#implementation UIView (JPCSetFont)
- (void)jpc_setAllFonts:(UIFont *)font
{
if ([self respondsToSelector:#selector(setFont:)]) {
UIFont *oldFont = [self valueForKey:#"font"];
UIFont *newFont = [font fontWithSize:oldFont.pointSize];
[self setValue:newFont forKey:#"font"];
}
for (UIView *subview in self.subviews) {
[subview jpc_setAllFonts:font];
}
}
#end

Answer 4

Code by John Cromartie is a good stuff. Simple and laconic.
Just keep in mind some fonts are bold or italic. So you probably have to pass 2 (or 3) params: for regular font (as it is now), for bold font and for the italic one. Besides you have to detect if the current font is bold, etc. So there is a bit enhanced piece of code below.
However, it can work wrong on iOS7 because user can set his own fonts and, as a result, weight / style detection won't work properly.
#implementation UIView (JPCSetFont)
- (void)jpc_setAllFonts:(UIFont*)regular bold:(UIFont*)bold
{
if ([self respondsToSelector:#selector(setFont:)]) {
UIFont *oldFont = [self valueForKey:#"font"];
UIFont *newFont;
// for iOS6
NSRange isBold = [[oldFont fontName] rangeOfString:#"Bold" options:NSCaseInsensitiveSearch];
// for iOS7 (is device owner didn't change it!)
NSRange isMedium = [[oldFont fontName] rangeOfString:#"MediumP4" options:NSCaseInsensitiveSearch];
if (isBold.location==NSNotFound && isMedium.location==NSNotFound) {
newFont = [regular fontWithSize:oldFont.pointSize];
} else {
newFont = [bold fontWithSize:oldFont.pointSize];
}
// TODO: there are italic fonts also though
[self setValue:newFont forKey:#"font"];
}
for (UIView *subview in self.subviews) {
[subview jpc_setAllFonts:regular bold:bold];
}
}
#end
https://github.com/iutinvg/ZZLib/blob/master/ZZLib/UIView%2BZZFontSetter.h
https://github.com/iutinvg/ZZLib/blob/master/ZZLib/UIView%2BZZFontSetter.m