如何在不指定大小的情况下为整个 iOS 应用程序设置自定义字体

How to set a custom font for entire iOS app without specifying size

提问by Janum Trivedi

I'm trying to apply a custom font throughout my iOS app. I found that I could use:

我正在尝试在整个iOS app. 我发现我可以使用：

 [[UILabel appearance] setFont:[UIFont fontWithName:@"Proxima Nova" size:17.0]];

• To set the default font and size for all UILabels. However, not all my UILabelsshare the same font size.

• In Set a default font for whole iOS app?, someone had the same concern, and was told to set the size parameter to 0.0 to only set the font and not font size.

• When I tried doing this, all the UILabeltext in my app disappeared (because evidently iOStook the 0.0 font size literally).

• 为所有UILabels. 但是，并非所有我都UILabels共享相同的字体大小。

• 在为整个 iOS 应用设置默认字体？，有人有同样的担忧，并被告知将大小参数设置为 0.0 以仅设置字体而不设置字体大小。

• 当我尝试这样做时，UILabel我的应用程序中的所有文本都消失了（因为显然iOS字面意思是 0.0 字体大小）。

Any suggestions as to how I can universally set a font but not size? Thanks a lot!

关于如何普遍设置字体而不是大小的任何建议？非常感谢！

采纳答案by Raegtime

- (void)viewDidLoad
{
    [super viewDidLoad];
    [self setFontFamily:@"FagoOfficeSans-Regular" forView:self.view andSubViews:YES];
}

-(void)setFontFamily:(NSString*)fontFamily forView:(UIView*)view andSubViews:(BOOL)isSubViews
{
    if ([view isKindOfClass:[UILabel class]])
    {
        UILabel *lbl = (UILabel *)view;
        [lbl setFont:[UIFont fontWithName:fontFamily size:[[lbl font] pointSize]]];
    }

    if (isSubViews)
    {
        for (UIView *sview in view.subviews)
        {
            [self setFontFamily:fontFamily forView:sview andSubViews:YES];
        }
    }    
}

回答by Damien Debin

Here is a solution in Objective-C, put this categoryanywhere you want to change UILabelApperancewithout setting UILabelFontSize:

这是Objective-C中的一个解决方案，将此类别放在您要更改的任何位置UILabelApperance而无需设置UILabelFontSize：

@implementation UILabel (SubstituteFontName)
- (void)setSubstituteFontName:(NSString *)name UI_APPEARANCE_SELECTOR {
    self.font = [UIFont fontWithName:name size:self.font.pointSize];
}
@end

Then, you can change the Apperancewith:

然后，您可以更改为Apperance：

[[UILabel appearance] setSubstituteFontName:@"SourceSansPro-Light"];

回答by marmor

I've used the accepted answer in my project, but needed a more generic function, so it'll change the font to every one possible, also I've chose to set a mapping between some stock fonts to our custom fonts, so they'll be accessible via storybuilder and xib files as well.

我在我的项目中使用了公认的答案，但需要一个更通用的功能，所以它会将字体更改为每一种可能的字体，而且我选择在一些库存字体与我们的自定义字体之间设置映射，所以他们也可以通过 storybuilder 和 xib 文件访问。

+ (void)setupFontsForView:(UIView *)view andSubViews:(BOOL)isSubViews
{
    if ([view respondsToSelector:@selector(setFont:)] && [view respondsToSelector:@selector(font)]) {
        id      viewObj = view;
        UIFont  *font   = [viewObj font];

        if ([font.fontName isEqualToString:@"AcademyEngravedLetPlain"]) {
            [viewObj setFont:[UIFont fontWithName:PRIMARY_FONT size:font.pointSize]];
        } else if ([font.fontName hasPrefix:@"AmericanTypewriter"]) {
            [viewObj setFont:[UIFont fontWithName:SECONDARY_FONT size:font.pointSize]];
        }
    }

    if (isSubViews) {
        for (UIView *sview in view.subviews) {
            [self setupFontsForView:sview andSubViews:YES];
        }
    }
}

回答by aViNaSh

By writing the category for the Label we can change the fonts of entire app.

通过为标签编写类别，我们可以更改整个应用程序的字体。

@implementation UILabel (CustomeFont)

-(void)awakeFromNib
{
    [super awakeFromNib];
    [self setBackgroundColor:[UIColor clearColor]];
    [self setFont:[UIFont fontWithName:@"Helvetica" size:self.font.pointSize]];
}

@end

回答by dimo hamdy

Swift3 https://gist.github.com/dimohamdy/c47992e14c1a3ee3315c06e2480e121e

Swift3 https://gist.github.com/dimohamdy/c47992e14c1a3ee3315c06e2480e121e

you can't set appearance for label font that make me create other value of default font and when i set the new font i get only the name of new font and old size of label and create other font and set this font

你不能设置标签字体的外观，这让我创建默认字体的其他值，当我设置新字体时，我只得到新字体的名称和标签的旧大小，并创建其他字体并设置此字体

    //when you want to set font for all labels in Application
    UILabel.appearance().defaultFont =  UIFont.systemFont(ofSize: 15/*Any Value*/, weight: UIFontWeightThin)

extension UILabel{
    dynamic var defaultFont: UIFont? {
        get { return self.font }
        set {
          //get old size of lable font
          let sizeOfOldFont = self.font.pointSize 
          //get new name  of font
          let fontNameOfNewFont = newValue?.fontName
          self.font = UIFont(name: fontNameOfNewFont!, size: sizeOfOldFont)
        }
    }
     }

回答by loglesby

Raegtime's answer ala Swift...

Raegtime 的回答 ala Swift ...

import UIKit

extension UIViewController {
    func setFontFamilyForView(_ fontFamily: String, view: UIView, andSubviews: Bool) {
        if let label = view as? UILabel {
            label.font = UIFont(name: fontFamily, size: label.font.pointSize)
        }

        if let textView = view as? UITextView {
            textView.font = UIFont(name: fontFamily, size: textView.font!.pointSize)
        }

        if let textField = view as? UITextField {
            textField.font = UIFont(name: fontFamily, size: textField.font!.pointSize)
        }

        if andSubviews {
            for v in view.subviews {
                setFontFamilyForView(fontFamily, view: v, andSubviews: true)
            }
        }
    }
}

回答by Peter Kreinz

UIView+DefaultFontAndColor.h

UIView+DefaultFontAndColor.h

#import <UIKit/UIKit.h>

@interface UIView (DefaultFontAndColor)

-(void)setDefaultFontFamily:(NSString*)fontFamily andSubViews:(BOOL)isSubViews andColor:(UIColor*) color;
@end

UIView+DefaultFontAndColor.m

UIView+DefaultFontAndColor.m

#import "UIView+DefaultFontAndColor.h"

@implementation UIView (DefaultFontAndColor)

//sets the default font for view classes by default
-(void)setDefaultFontFamily:(NSString*)fontFamily andSubViews:(BOOL)isSubViews andColor:     (UIColor*) color
{
    if ([self isKindOfClass:[UILabel class]])
    {
        UILabel *lbl = (UILabel *)self;
        [lbl setFont:[UIFont fontWithName:fontFamily size:[[lbl font] pointSize]]];

        if( color )
            lbl.textColor = color;
    }
    else if ([self isKindOfClass:[UIButton class]])
    {
        UIButton *btn = (UIButton *)self;
        [btn.titleLabel setFont:[UIFont fontWithName:fontFamily size:[[btn.titleLabel font] pointSize]]];

        if( color )
        {
            btn.tintColor = color;
        }
    }

    if (isSubViews)
    {
        for (UIView *sview in self.subviews)
        {
            [sview setDefaultFontFamily:fontFamily andSubViews:YES andColor:color];
        }
    }
}
@end

@usage: without color:

@用法：没有颜色：

#import "UIView+DefaultFontAndColor.h"

UIView myView = [[UIView alloc] init]
[myView setDefaultFontFamily:@"Arial" andSubViews:YES andColor:nil];

@usage: with color:

@用法：带颜色：

#import "UIView+DefaultFontAndColor.h"

UIView myView = [[UIView alloc] init]
[myView setDefaultFontFamily:@"Arial" andSubViews:YES andColor:[UIColor greenColor] ];