iphone - 将 UISlider 连接到 fontSize

Question

将 UISlider 连接到 fontSize [ (IBAction)font1 和 (IBAction)font2 ] 的可能方法。这是代码

.h

@interface ViewController : UIViewController
{
    IBOutlet UISlider* fontSizeSlider;
    IBOutlet UITextView* textView;
}
-(IBAction)sliderValueChanged:(UISlider*)sender;
-(IBAction)font1;
-(IBAction)font2;
@end

.m

-(IBAction)sliderValueChanged:(UISlider*)sender
{
   textView.font = [UIFont fontWithName:@"??????" size:sender.value];
}

-(IBAction)font1{
   textView.font = [UIFont fontWithName:@"Heiti TC" size:18];
}

-(IBAction)font2{
    textView.font = [UIFont fontWithName:@"Marker Felt" size:18];
}

-(IBAction)font1; //[UIButton]

-(IBAction)font1; //[UIButton]

-(IBAction)sliderValueChanged; //[UISlider]

Answer 1

如果我没理解错的话，您希望能够从两种字体中进行选择。因此，您必须将字体名称存储在 NSString 中。像这样:

.h

@interface ViewController : UIViewController
{
    IBOutlet UISlider* fontSizeSlider;
    IBOutlet UITextView* textView;
    NSString *currentFont;
}
-(IBAction)sliderValueChanged:(UISlider*)sender;
-(IBAction)font1;
-(IBAction)font2;
@end

.m

-(void)viewDidLoad {
    [super viewDidLoad];
    currentFont = @"Heiti TC"; //Or whatever your default font is
    textView.font = [UIFont fontWithName:currentFont size:sender.value];
}
-(IBAction)sliderValueChanged:(UISlider*)sender
{
   textView.font = [UIFont fontWithName:currentFont size:sender.value];
}

-(IBAction)font1{
   currentFont = @"Heiti TC";
   textView.font = [UIFont fontWithName:currentFont size:fontSizeSlider.value];
}

-(IBAction)font2{
   currentFont = @"Marker Felt";
   textView.font = [UIFont fontWithName:currentFont size:fontSizeSlider.value];
}