NSAttributedString编程

- (void)viewDidLoad
{
    [super viewDidLoad];

    
    NSMutableAttributedString *attributedString = [[[NSMutableAttributedString alloc] initWithString:@"測试富文本显示"] autorelease];
    //为全部文本设置字体
    [attributedString addAttribute:NSFontAttributeName value:[UIFont systemFontOfSize:24.0] range:NSMakeRange(0, [attributedString length])];
    //将“測试”两字字体颜色设置为蓝色
    [attributedString addAttribute:NSForegroundColorAttributeName value:[UIColor blueColor] range:NSMakeRange(0, 2)];
    //将“富文本”三个字字体颜色设置为红色
    [attributedString addAttribute:NSForegroundColorAttributeName value:[UIColor redColor] range:NSMakeRange(2, 3)];

    self.label = [[[UILabel alloc] init] autorelease];
    self.label.frame = CGRectMake(10, 100, 300, 30);
    self.label.attributedText = attributedString;
    [self.view addSubview:self.label];
    
    UIFont *font = [UIFont fontWithName:@"Palatino-Roman" size:14.0];
    NSDictionary *attrsDictionary = [NSDictionary dictionaryWithObject:font
                                                                forKey:NSFontAttributeName];
    NSAttributedString *attrString = [[NSAttributedString alloc] initWithString:@"用DIC显示文字"
                                                                     attributes:attrsDictionary];
    UILabel *labTwo = [[UILabel alloc] initWithFrame:CGRectMake(10, 150, 300, 30)];
    labTwo.attributedText = attrString;
    [self.view addSubview:labTwo];
    [labTwo release];
    [attrString release];
    
    UIFont *dicFont = [UIFont boldSystemFontOfSize:20];
    UIColor *foregroundColor = [UIColor blueColor];
    NSNumber *underline = [NSNumber numberWithInt:NSUnderlineStyleSingle];  // 下划线
    
    NSShadow *shadow = [[NSShadow alloc] init];
    shadow.shadowBlurRadius = 5;  // 模糊度
    shadow.shadowColor = [UIColor blackColor];
    shadow.shadowOffset = CGSizeMake(1, 3);
    
    NSDictionary *attrsDic = @{NSForegroundColorAttributeName: foregroundColor,
                               NSUnderlineStyleAttributeName: underline,
                               NSFontAttributeName:dicFont,
                               //NSStrokeColorAttributeName:[UIColor redColor], // 绘制空心字颜色
                               //NSStrokeWidthAttributeName:@3,                  // 默觉得 0。即不改变。正数仅仅改变描边宽度。负数同一时候改变文字的描边和填充宽度。

比如，对于常见的空心字，这个值通常为3.0。
                               NSShadowAttributeName:shadow,
                               NSObliquenessAttributeName:@0.5,   // 设置字体倾斜度
                               };
    
    NSAttributedString *attributedString_str_atts = [[NSAttributedString alloc] initWithString:@"http://www.baidu.com" attributes:attrsDic];
    // NSLog(@"%@", attributedString_str_atts);
    UILabel *labThree = [[UILabel alloc] initWithFrame:CGRectMake(10, 200, 300, 30)];
    labThree.attributedText = attributedString_str_atts;
    [self.view addSubview:labThree];
    [attributedString_str_atts release];
    [labThree release];
    
    UIFont *txtFont = [UIFont boldSystemFontOfSize:30];
    NSDictionary *attDic = @{NSFontAttributeName:txtFont,
                             NSObliquenessAttributeName:@0.5,
                             };
    NSAttributedString *attribute = [[NSAttributedString alloc] initWithString:@"測试显示" attributes:attDic];
    
    
    UILabel *labFour = [[UILabel alloc] initWithFrame:CGRectMake(10, 250, 300, 50)];
    labFour.attributedText = attribute;
    [self.view addSubview:labFour];
    [attribute release];
    [labFour release];
}