iOS 学习笔记10 core Text 对齐方式

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UILabel 这他的默认宽度大小是21,你把它定义的宽度大小为12，那么字体比较大点的时候，就会出现无法显示的问题，他就不会显示出来，隐藏起来了

typedef CF_ENUM(uint8_t, CTTextAlignment) {    kCTTextAlignmentLeft = 0,    kCTTextAlignmentRight = 1,    kCTTextAlignmentCenter = 2,    kCTTextAlignmentJustified = 3,    kCTTextAlignmentNatural = 4,    kCTLeftTextAlignment = kCTTextAlignmentLeft,    kCTRightTextAlignment = kCTTextAlignmentRight,    kCTCenterTextAlignment = kCTTextAlignmentCenter,    kCTJustifiedTextAlignment = kCTTextAlignmentJustified,    kCTNaturalTextAlignment = kCTTextAlignmentNatural};

        CTTextAlignment alignment = kCTRightTextAlignment; //文本对齐方式        CTParagraphStyleSetting alignmentStyle;        alignmentStyle.spec=kCTParagraphStyleSpecifierAlignment;//指定为对齐属性        alignmentStyle.valueSize=sizeof(alignment);        alignmentStyle.value=&alignment;        CTParagraphStyleSetting settings[]={            alignmentStyle        };//设置样式        CTParagraphStyleRef paragraphStyle = CTParagraphStyleCreate(settings, sizeof(settings));        //给字符串添加样式attribute        [resultAttributedStringaddAttribute:(id)kCTParagraphStyleAttributeName                       value:(id)paragraphStyle                       range:NSMakeRange(0, [resultAttributedString length])];