如何为不同的UI按钮状态设置不同的字体?感谢您对此的帮助.
最佳答案
这是一个非常酷的问题,它促使我创建了一个UIButton的子类,允许设置状态字体!
我还写了一些示例代码,演示如何设置字体.如果您使用的是Interface Builder,则将按钮的类设置为ConfigurableButton.在代码中,按钮也必须声明为ConfigurableButton,因为我添加了新属性和setFont:forState:方法.
请对可以进行的任何改进发表评论!
查看控制器实现
#import "ViewController.h"
#import "ConfigurableButton.h"
@interface ViewController ()
@property (weak, nonatomic) IBOutlet ConfigurableButton *toggleButton;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
//Set the fonts for button's states
_toggleButton.normalFont = [UIFont fontWithName:@"BradleyHandITCTT-Bold" size:14];
_toggleButton.highlightedFont = [UIFont fontWithName:@"Chalkduster" size:14];
_toggleButton.selectedFont = [UIFont fontWithName:@"Zapfino" size:14];
_toggleButton.disabledFont = [UIFont fontWithName:@"Arial" size:14];
}
@end
ConfigurableButton.h
#import <UIKit/UIKit.h>
IB_DESIGNABLE
/**
* A button that allows fonts to be assigned to each of the button's states.
*
* A state font can be specified using setFont:forState, or through one of the
* four state Font properties.
*
* If a font is not specified for a given state, then
* the System font will be displayed with a font size of 15.
*/
@interface ConfigurableButton : UIButton
@property (strong, nonatomic) UIFont *normalFont;
@property (strong, nonatomic) UIFont *highlightedFont;
@property (strong, nonatomic) UIFont *selectedFont;
@property (strong, nonatomic) UIFont *disabledFont;
/**
* Set a font for a button state.
*
* @param font the font
* @param state a control state -- can be
* UIControlStateNormal
* UIControlStateHighlighted
* UIControlStateDisabled
* UIControlStateSelected
*/
- (void) setFont:(UIFont *)font forState:(NSUInteger)state;
@end
ConfigurableButton.m
#import "ConfigurableButton.h"
@implementation ConfigurableButton
//Sets one of the font properties, depending on which state was passed
- (void) setFont:(UIFont *)font forState:(NSUInteger)state
{
switch (state) {
case UIControlStateNormal:
{
self.normalFont = font;
break;
}
case UIControlStateHighlighted:
{
self.highlightedFont = font;
break;
}
case UIControlStateDisabled:
{
self.disabledFont = font;
break;
}
case UIControlStateSelected:
{
self.selectedFont = font;
break;
}
default:
{
self.normalFont = font;
break;
}
}
}
/**
* Overrides layoutSubviews in UIView, to set the font for the button's state,
* before calling [super layoutSubviews].
*/
- (void) layoutSubviews
{
NSUInteger state = self.state;
switch (state) {
case UIControlStateNormal:
{
[self setTitleFont:_normalFont];
break;
}
case UIControlStateHighlighted:
{
[self setTitleFont:_highlightedFont];
break;
}
case UIControlStateDisabled:
{
[self setTitleFont:_disabledFont];
break;
}
case UIControlStateSelected:
{
[self setTitleFont:_selectedFont];
break;
}
default:
{
[self setTitleFont:_normalFont];
break;
}
}
[super layoutSubviews];
}
/**
* Private
*
* Convenience method that falls back to the System font,
* if no font is configured.
*/
- (void) setTitleFont:(UIFont *)font
{
if (!font) {
font = [UIFont systemFontOfSize:15];
}
self.titleLabel.font = font;
}
@end
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