当我在故事板中使用UITextView时,我可以选择文本作为属性字符串并设置其属性,如颜色,字体和其他属性。当我在代码中设置textView.text = @"my string"
时,它会显示为我设置的内容。
我的问题是,如果我想在代码中执行此操作,那么这个故事板属性设置会等同于什么?从文档https://developer.apple.com/library/ios/documentation/UIKit/Reference/UITextView_Class/index.html#//apple_ref/occ/instp/UITextView/text我看到一些属性,即textColor,font,但缺少一些我可以像行高一样设置的属性。
答案 0 :(得分:2)
这是通过属性字符串对象完成的!你一定要看一下编程指南: https://developer.apple.com/library/ios/documentation/Cocoa/Conceptual/AttributedStrings/AttributedStrings.html
根据要求,提供一个简短示例,说明如何创建属性字符串。
- (void)viewDidLoad
{
[super viewDidLoad];
//
// Example 1: Create attributed string and set attributes for ranges
//
NSString *plainString = @"Hello World";
NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:plainString];
// change the font of the entire string
[attributedString addAttribute:NSFontAttributeName
value:[UIFont fontWithName:@"Courier New" size:16.0]
range:NSMakeRange(0, plainString.length)];
// set the font color to blue for the word 'World'
[attributedString addAttribute:NSForegroundColorAttributeName
value:[UIColor blueColor]
range:NSMakeRange(6, 4)];
// assign to texfield 1
self.tfAttributedString1.attributedText = attributedString;
//
// Example 2: Create attributed string based on html
//
NSString *htmlString = @"<p style='font-family:Courier New'>Hello <span style='color:blue'>html</span></p>";
NSData *htmlStringData = [htmlString dataUsingEncoding:NSUTF8StringEncoding];
NSDictionary *attributedStringOptions = @{
NSDocumentTypeDocumentAttribute:NSHTMLTextDocumentType,
NSCharacterEncodingDocumentAttribute: @(NSUTF8StringEncoding)
};
// assign to texfield 2
self.tfAttributedString2.attributedText = [[NSAttributedString alloc] initWithData:htmlStringData
options: attributedStringOptions
documentAttributes:nil error:nil];
}
这就是结果: