我制作了一个字体选择器,显示轮子内的所有字体。
我现在需要添加 2 个额外的部分来更改字体大小和样式(粗体、斜体、下划线)。
样式和大小是 UIFont 类的成员吗?如果是这样,它们是如何访问的?
这是我正在使用的代码:
.h 文件:
#import <UIKit/UIKit.h>
@interface ViewController : UIViewController
{
NSArray *fonts;
NSMutableArray *fontNames;
NSArray *fontSize;
NSArray *fontStyle;
}
@property (strong, nonatomic,retain) IBOutlet UIPickerView *fontPicker;
@property (strong, nonatomic) IBOutlet UILabel *fontLabel;
@end
更新的 .m 文件。这给了我一个选择大小的部分,但它也改变了字体:
#import "ViewController.h"
@interface ViewController ()
{
}
@end
@implementation ViewController
#define MINIMUM_ALLOWED_FONT_SIZE 13
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
fontNames = [NSMutableArray array];
for(NSString *familyName in [UIFont familyNames]) {
for(NSString *fontName in [UIFont fontNamesForFamilyName:familyName]) {
[fontNames addObject:fontName];
}
}
_fontPicker.hidden = YES;
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (NSInteger)numberOfComponentsInPickerView:
(UIPickerView *)pickerView
{
return 2;
}
- (NSInteger)pickerView:(UIPickerView *)pickerView
numberOfRowsInComponent:(NSInteger)component
{
if(component == 0)
{
return fontNames.count;
}
else if (component == 1){
return MINIMUM_ALLOWED_FONT_SIZE + 17;
}
return -1;
}
- (UIView *)pickerView:(UIPickerView *)pickerView
viewForRow:(NSInteger)row
forComponent:(NSInteger)component
reusingView:(UIView *)view {
UILabel *pickerLabel = (UILabel *)view;
if (component == 0) {
CGRect frame = CGRectMake(0.0, 0.0, 80, 32);
pickerLabel = [[UILabel alloc] initWithFrame:frame];
pickerLabel.backgroundColor = [UIColor clearColor];
pickerLabel.textAlignment = NSTextAlignmentLeft;
pickerLabel.text = [NSString stringWithFormat:@"%@",[fontNames objectAtIndex:row]];
pickerLabel.font = [UIFont fontWithName:[fontNames objectAtIndex:row] size:15];
return pickerLabel;
} else if (component == 1) {
sizeLabel = [[UILabel alloc]initWithFrame:CGRectMake(0,0,80,32)];
sizeLabel.backgroundColor = [UIColor clearColor];
sizeLabel.textAlignment = NSTextAlignmentLeft;
sizeLabel.text = [NSString stringWithFormat:@"%i", (row + MINIMUM_ALLOWED_FONT_SIZE)];
return sizeLabel;
}
return nil;
}
-(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row
inComponent:(NSInteger)component
{
_fontLabel.text = [fontNames objectAtIndex:row];
_fontLabel.font = [UIFont fontWithName:[fontNames objectAtIndex:row] size:MINIMUM_ALLOWED_FONT_SIZE];
if(component == 1)
{
_fontLabel.font = [UIFont fontWithName:[fontNames objectAtIndex:row] size:row+MINIMUM_ALLOWED_FONT_SIZE];
}
}
- (IBAction)operationPressed:(id)sender {
_fontPicker.hidden = NO;
}
@end