UILabel

時間 2019-11-19

標籤 uilabel 简体版

原文原文鏈接

#import "ViewController.h"
#import <CoreText/CoreText.h>
@interface ViewController ()
@end
@implementation ViewController
- (void)viewDidLoad
{
[super viewDidLoad];
//學習內容
/*
1.控件 UIView UILabel UITextField UITextView UIButton
2.字體、大小、單位、顏色
*/
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(10, 30, 300, 260)];
label.text = @"Label Text Content, This is a text label things attribute";//默認爲空
label.font = [UIFont systemFontOfSize:17];//默認使用系統的17
label.textColor = [UIColor orangeColor];//默認使用文本黑色
label.shadowColor = [UIColor lightGrayColor];//默認沒有陰影
label.shadowOffset = CGSizeMake(1,0);//默認是一個向上的陰影(0,-1)
label.textAlignment = NSTextAlignmentCenter;//默認是左對齊
label.lineBreakMode = NSLineBreakByTruncatingTail;//段落樣式，默認是最後截斷尾巴，用...代替
//富文本的基本數據類型，屬性字符串。以此爲基礎，若是這個設置了相應的屬性，則會忽略上面設置的屬性，默認爲空
NSString *string = label.text;
const CGFloat fontSize = 16.0;
NSMutableAttributedString *attrString = [[NSMutableAttributedString alloc] initWithString:string];
NSUInteger length = [string length];
//設置字體
UIFont *baseFont = [UIFont systemFontOfSize:fontSize];
[attrString addAttribute:NSFontAttributeName value:baseFont range:NSMakeRange(0, length)];//設置全部的字體
UIFont *boldFont = [UIFont boldSystemFontOfSize:fontSize];
[attrString addAttribute:NSFontAttributeName value:boldFont range:[string rangeOfString:@"Text"]];//設置Text這四個字母的字體爲粗體
//設置傾斜，須要導入coreText
UIFont *italicFont = GetVariationOfFontWithTrait(baseFont,
kCTFontTraitItalic);
[attrString addAttribute:NSFontAttributeName value:italicFont
range:[string rangeOfString:@"Label"]];
// 設置顏色
UIColor *color = [UIColor redColor];
[attrString addAttribute:NSForegroundColorAttributeName
value:color
range:[string rangeOfString:@"Content"]];
[attrString addAttribute:NSBackgroundColorAttributeName value:[UIColor blueColor] range:[string rangeOfString:@"ent"]];
//能夠對這些屬性設置值
//字體名稱有如下：
// label.font = [UIFont fontWithName:@"Arial-BoldItalicMT" size:24];
[attrString addAttribute:NSFontAttributeName value:[UIFont fontWithName:@"Verdana-BoldItalic" size:18] range:[string rangeOfString:@"Label"]];
label.numberOfLines = 2;
NSMutableParagraphStyle *
style = [[NSParagraphStyle defaultParagraphStyle] mutableCopy];
style.lineSpacing = 10;//增長行高
style.headIndent = 10;//頭部縮進，至關於左padding
style.tailIndent = -10;//至關於右padding
style.lineHeightMultiple = 1.5;//行間距是多少倍
style.alignment = NSTextAlignmentLeft;//對齊方式
style.firstLineHeadIndent = 20;//首行頭縮進
style.paragraphSpacing = 10;//段落後面的間距
style.paragraphSpacingBefore = 20;//段落以前的間距
[attrString addAttribute:NSParagraphStyleAttributeName value:style range:NSMakeRange(0, length)];
[attrString addAttribute:NSKernAttributeName value:@2 range:NSMakeRange(0, length)];//字符間距 2pt
[attrString addAttribute:NSStrokeColorAttributeName value:[UIColor blueColor] range:[string rangeOfString:@"is"]];//設置文字描邊顏色，須要和NSStrokeWidthAttributeName設置描邊寬度，這樣就能使文字空心
[attrString addAttribute:NSStrokeWidthAttributeName value:@2 range:[string rangeOfString:@"is"]];//空心字，文字邊框描述
[attrString addAttribute:NSUnderlineStyleAttributeName value:@(NSUnderlineStyleSingle) range:[string rangeOfString:@"text"]];//下劃線
[attrString addAttribute:NSUnderlineStyleAttributeName value:@(NSUnderlineStyleThick) range:[string rangeOfString:@"label"]];//厚的下劃線
[attrString addAttribute:NSStrikethroughStyleAttributeName value:@(NSUnderlinePatternSolid | NSUnderlineStyleSingle) range:[string rangeOfString:@"things"]];//刪除線
[attrString addAttribute:NSStrikethroughColorAttributeName value:[UIColor blueColor] range:[string rangeOfString:@"things"]];//刪除線藍色
label.attributedText = attrString;
label.highlightedTextColor = [UIColor redColor];//設置文本高亮顯示顏色，與highlighted一塊兒使用。
label.highlighted = NO; //高亮狀態是否打開
label.enabled = YES;//設置文字內容是否可變
label.userInteractionEnabled = YES;//設置標籤是否忽略或移除用戶交互。默認爲NO
label.baselineAdjustment = UIBaselineAdjustmentNone;//若是adjustsFontSizeToFitWidth屬性設置爲YES，這個屬性就來控制文本基線的行爲。
// UIBaselineAdjustmentAlignBaselines=0，默認，文本最上端與中線對齊。
// UIBaselineAdjustmentAlignCenters, 文本中線與label中線對齊。
// UIBaselineAdjustmentNone, 文本最低端與label中線對齊。;
[self.view addSubview:label];
/*
字體名以下：
Font Family: American Typewriter
Font: AmericanTypewriter
Font: AmericanTypewriter-Bold
Font Family: AppleGothic
Font: AppleGothic
Font Family: Arial
Font: ArialMT
Font: Arial-BoldMT
Font: Arial-BoldItalicMT
Font: Arial-ItalicMT
Font Family: Arial Rounded MT Bold
Font: ArialRoundedMTBold
Font Family: Arial Unicode MS
Font: ArialUnicodeMS
Font Family: Courier
Font: Courier
Font: Courier-BoldOblique
Font: Courier-Oblique
Font: Courier-Bold
Font Family: Courier New
Font: CourierNewPS-BoldMT
Font: CourierNewPS-ItalicMT
Font: CourierNewPS-BoldItalicMT
Font: CourierNewPSMT
Font Family: DB LCD Temp
Font: DBLCDTempBlack
Font Family: Georgia
Font: Georgia-Bold
Font: Georgia
Font: Georgia-BoldItalic
Font: Georgia-Italic
Font Family: Helvetica
Font: Helvetica-Oblique
Font: Helvetica-BoldOblique
Font: Helvetica
Font: Helvetica-Bold
Font Family: Helvetica Neue
Font: HelveticaNeue
Font: HelveticaNeue-Bold
Font Family: Hiragino Kaku Gothic **** W3
Font: HiraKakuProN-W3
Font Family: Hiragino Kaku Gothic **** W6
Font: HiraKakuProN-W6
Font Family: Marker Felt
Font: MarkerFelt-Thin
Font Family: STHeiti J
Font: STHeitiJ-Medium
Font: STHeitiJ-Light
Font Family: STHeiti K
Font: STHeitiK-Medium
Font: STHeitiK-Light
Font Family: STHeiti SC
Font: STHeitiSC-Medium
Font: STHeitiSC-Light
Font Family: STHeiti TC
Font: STHeitiTC-Light
Font: STHeitiTC-Medium
Font Family: Times New Roman
Font: TimesNewRomanPSMT
Font: TimesNewRomanPS-BoldMT
Font: TimesNewRomanPS-BoldItalicMT
Font: TimesNewRomanPS-ItalicMT
Font Family: Trebuchet MS
Font: TrebuchetMS-Italic
Font: TrebuchetMS
Font: Trebuchet-BoldItalic
Font: TrebuchetMS-Bold
Font Family: Verdana
Font: Verdana-Bold
Font: Verdana-BoldItalic
Font: Verdana
Font: Verdana-Italic
Font Family: Zapfino
Font: Zapfino
*/
//文本對齊方式
/* Values for NSTextAlignment */
/*
NSTextAlignmentLeft 左對齊
NSTextAlignmentCenter 劇中對齊
NSTextAlignmentRight 右對齊
NSTextAlignmentJustified 兩端對齊
NSTextAlignmentNatural 根據顯示的文字特性對齊
*/
//段落樣式
/*
lineSpacing; 來增長行距
paragraphSpacing;
alignment; 對齊
firstLineHeadIndent; 段落開始的縮排像素
headIndent; 可調整所有文字的縮排距離，可看成左邊 padding 使用
tailIndent; 可調整文字尾端的縮排距離。須要注意的是，這裏指定的值能夠看成文字顯示的寬、而也可看成右邊 padding 使用，依據輸入的正負值而定：
lineBreakMode;
minimumLineHeight;
maximumLineHeight; 而針對不一樣的字型與字號，咱們能夠透過指定最大與最小行距（maximumLineHeight 與 minimumLineHeight）來避免太高或過窄的情況發生。
baseWritingDirection;
lineHeightMultiple; 想要調整行距，能夠透過搭配使用 lineHeightMultiple 更改行距倍數
paragraphSpacingBefore; 而如果文章內容有分段落的話，也能夠透過指定段落結尾距離（paragraphSpacing）以及段落開頭距離（paragraphSpacingBefore）:
hyphenationFactor;
@property(readwrite,copy,NS_NONATOMIC_IOSONLY) NSArray *tabStops NS_AVAILABLE_IOS(7_0);
@property(readwrite,NS_NONATOMIC_IOSONLY) CGFloat defaultTabInterval NS_AVAILABLE_IOS(7_0);
*/
/* Predefined character attributes for text. If the key is not in the dictionary, then use the default values as described below. // 預約義的文本屬性值，若是鍵不是一個字典，那麼使用默認的值做爲如下描述
NSFontAttributeName 字體默認是Helvetica 12號
NSParagraphStyleAttributeName 段落樣式
*/
/*
UIKIT_EXTERN NSString *const NS_AVAILABLE_IOS(6_0); // NSParagraphStyle, default defaultParagraphStyle
UIKIT_EXTERN NSString *const NSForegroundColorAttributeName NS_AVAILABLE_IOS(6_0); // UIColor, default blackColor
UIKIT_EXTERN NSString *const NSBackgroundColorAttributeName NS_AVAILABLE_IOS(6_0); // UIColor, default nil: no background
UIKIT_EXTERN NSString *const NSLigatureAttributeName NS_AVAILABLE_IOS(6_0); // NSNumber containing integer, default 1: default ligatures, 0: no ligatures
UIKIT_EXTERN NSString *const NSKernAttributeName NS_AVAILABLE_IOS(6_0); // NSNumber containing floating point value, in points; amount to modify default kerning. 0 means kerning is disabled. (note: values other than nil and 0 are unsupported on iOS)
UIKIT_EXTERN NSString *const NSStrikethroughStyleAttributeName NS_AVAILABLE_IOS(6_0); // NSNumber containing integer, default 0: no strikethrough
UIKIT_EXTERN NSString *const NSUnderlineStyleAttributeName NS_AVAILABLE_IOS(6_0); // NSNumber containing integer, default 0: no underline
UIKIT_EXTERN NSString *const NSStrokeColorAttributeName NS_AVAILABLE_IOS(6_0); // UIColor, default nil: same as foreground color
UIKIT_EXTERN NSString *const NSStrokeWidthAttributeName NS_AVAILABLE_IOS(6_0); // NSNumber containing floating point value, in percent of font point size, default 0: no stroke; positive for stroke alone, negative for stroke and fill (a typical value for outlined text would be 3.0)
UIKIT_EXTERN NSString *const NSShadowAttributeName NS_AVAILABLE_IOS(6_0); // NSShadow, default nil: no shadow
UIKIT_EXTERN NSString *const NSTextEffectAttributeName NS_AVAILABLE_IOS(7_0); // NSString, default nil: no text effect
UIKIT_EXTERN NSString *const NSAttachmentAttributeName NS_AVAILABLE_IOS(7_0); // NSTextAttachment, default nil
UIKIT_EXTERN NSString *const NSLinkAttributeName NS_AVAILABLE_IOS(7_0); // NSURL (preferred) or NSString
UIKIT_EXTERN NSString *const NSBaselineOffsetAttributeName NS_AVAILABLE_IOS(7_0); // NSNumber containing floating point value, in points; offset from baseline, default 0
UIKIT_EXTERN NSString *const NSUnderlineColorAttributeName NS_AVAILABLE_IOS(7_0); // UIColor, default nil: same as foreground color
UIKIT_EXTERN NSString *const NSStrikethroughColorAttributeName NS_AVAILABLE_IOS(7_0); // UIColor, default nil: same as foreground color
UIKIT_EXTERN NSString *const NSObliquenessAttributeName NS_AVAILABLE_IOS(7_0); // NSNumber containing floating point value; skew to be applied to glyphs, default 0: no skew
UIKIT_EXTERN NSString *const NSExpansionAttributeName NS_AVAILABLE_IOS(7_0); // NSNumber containing floating point value; log of expansion factor to be applied to glyphs, default 0: no expansion
UIKIT_EXTERN NSString *const NSWritingDirectionAttributeName NS_AVAILABLE_IOS(7_0); // NSArray of NSNumbers representing the nested levels of writing direction overrides as defined by Unicode LRE, RLE, LRO, and RLO characters. The control characters can be obtained by masking NSWritingDirection and NSTextWritingDirection values. LRE: NSWritingDirectionLeftToRight|NSTextWritingDirectionEmbedding, RLE: NSWritingDirectionRightToLeft|NSTextWritingDirectionEmbedding, LRO: NSWritingDirectionLeftToRight|NSTextWritingDirectionOverride, RLO: NSWritingDirectionRightToLeft|NSTextWritingDirectionOverride,
UIKIT_EXTERN NSString *const NSVerticalGlyphFormAttributeName NS_AVAILABLE_IOS(6_0); // An NSNumber containing an integer value. 0 means horizontal text. 1 indicates vertical text. If not specified, it could follow higher-level vertical orientation settings. Currently on iOS, it's always horizontal. The behavior for any other value is undefined.
*/
// NSParagraphStyle 段落樣式
// typedef NS_ENUM(NSInteger, NSLineBreakMode) { /* What to do with long lines */ //對於長內容或多行內容的處理方式
// NSLineBreakByWordWrapping = 0, /* Wrap at word boundaries, default */ //按包含單詞爲界限截斷
// NSLineBreakByCharWrapping, /* Wrap at character boundaries */ //按字符爲界限截斷
// NSLineBreakByClipping, /* Simply clip */ //簡單的修剪
// NSLineBreakByTruncatingHead, /* Truncate at head of line: "...wxyz" */ //截斷頭部
// NSLineBreakByTruncatingTail, /* Truncate at tail of line: "abcd..." */ //截斷尾巴
// NSLineBreakByTruncatingMiddle /* Truncate middle of line: "ab...yz" */ //截斷中間
// } NS_ENUM_AVAILABLE_IOS(6_0);
}
//獲取斜體
UIFont * GetVariationOfFontWithTrait(UIFont *baseFont,
CTFontSymbolicTraits trait) {
CGFloat fontSize = [baseFont pointSize];
CFStringRef
baseFontName = (__bridge CFStringRef)[baseFont fontName];
CTFontRef baseCTFont = CTFontCreateWithName(baseFontName,
fontSize, NULL);
CTFontRef ctFont =
CTFontCreateCopyWithSymbolicTraits(baseCTFont, 0, NULL,
trait, trait);
NSString *variantFontName =
CFBridgingRelease(CTFontCopyName(ctFont,
kCTFontPostScriptNameKey));
UIFont *variantFont = [UIFont fontWithName:variantFontName
size:fontSize];
CFRelease(ctFont);
CFRelease(baseCTFont);
return variantFont;
};
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end

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