// 繪制文本的圖層 
CATextLayer *layerText = [[CATextLayer alloc] init]; 
// 背景顏色 
layerText.backgroundColor = [UIColor orangeColor].CGColor; 
// 渲染分辨率-重要，否則顯示模糊 
layerText.contentsScale = [UIScreen mainScreen].scale; 
// 顯示位置 
layerText.bounds = CGRectMake(0.0, 0.0, 100.0, 50.0); 
layerText.position = position; 
// 添加到父圖書 
[self.view.layer addSublayer:layerText]; 

// 分行顯示 
layerText.wrapped = YES; 
// 超長顯示時，省略號位置 
layerText.truncationMode = kCATruncationNone; 
// 字體顏色 
layerText.foregroundColor = [UIColor purpleColor].CGColor; 
// 字體名稱、大小 
UIFont *font = [UIFont systemFontOfSize:15.0]; 
CFStringRef fontName = (__bridge CFStringRef)font.fontName; 
CGFontRef fontRef =CGFontCreateWithFontName(fontName); 
layerText.font = fontRef; 
layerText.fontSize = font.pointSize; 
CGFontRelease(fontRef); 
// 字體對方方式 
layerText.alignmentMode = kCAAlignmentJustified; 

// 字符顯示 
NSString *text = @"devZhang is iOSDeveloper.devZhang is iOSDeveloper.devZhang is iOSDeveloper.devZhang is iOSDeveloper."; 

// 方法1-簡單顯示 
layerText.string = text; 

// 方法2-富文本顯示 
// 文本段落樣式 
NSMutableParagraphStyle *textStyle = [[NSMutableParagraphStyle alloc] init]; 
textStyle.lineBreakMode = NSLineBreakByWordWrapping; // 結尾部分的內容以……方式省略 ( "...wxyz" ,"abcd..." ,"ab...yz") 
textStyle.alignment = NSTextAlignmentCenter; //（兩端對齊的）文本對齊方式：（左，中，右，兩端對齊，自然） 
textStyle.lineSpacing = 5; // 字體的行間距 
textStyle.firstLineHeadIndent = 5.0; // 首行縮進 
textStyle.headIndent = 0.0; // 整體縮進(首行除外) 
textStyle.tailIndent = 0.0; // 
textStyle.minimumLineHeight = 20.0; // 最低行高 
textStyle.maximumLineHeight = 20.0; // 最大行高 
textStyle.paragraphSpacing = 15; // 段與段之間的間距 
textStyle.paragraphSpacingBefore = 22.0f; // 段首行空白空間/* Distance between the bottom of the previous paragraph (or the end of its paragraphSpacing, if any) and the top of this paragraph. */ 
textStyle.baseWritingDirection = NSWritingDirectionLeftToRight; // 從左到右的書寫方向（一共➡️三種） 
textStyle.lineHeightMultiple = 15; /* Natural line height is multiplied by this factor (if positive) before being constrained by minimum and maximum line height. */ 
textStyle.hyphenationFactor = 1; //連字屬性 在iOS，唯一支持的值分別為0和1 
// 文本屬性 
NSMutableDictionary *textAttributes = [[NSMutableDictionary alloc] init]; 
// NSParagraphStyleAttributeName 段落樣式 
[textAttributes setValue:textStyle forKey:NSParagraphStyleAttributeName]; 
// NSFontAttributeName 字體名稱和大小 
[textAttributes setValue:[UIFont systemFontOfSize:12.0] forKey:NSFontAttributeName]; 
// NSForegroundColorAttributeNam 顏色 
[textAttributes setValue:[UIColor greenColor] forKey:NSForegroundColorAttributeName]; 
NSMutableAttributedString *attributedText = [[NSMutableAttributedString alloc] initWithString:text]; 
[attributedText setAttributes:textAttributes range:NSMakeRange(0, 8)]; 
layerText.string = attributedText;