2016.12.7
NSMutableParagraphStyle*paraStyle = [[NSMutableParagraphStylealloc]init];
paraStyle.lineBreakMode=NSLineBreakByCharWrapping;
paraStyle.alignment=NSTextAlignmentJustified;
paraStyle.lineSpacing=10;//设置行间距
paraStyle.firstLineHeadIndent=10.0;//首行缩进
paraStyle.paragraphSpacingBefore=5.0;//段首行空白空间
paraStyle.headIndent=10.0;//头部缩进，相当于左padding首行除外
paraStyle.tailIndent= -10.0;//相当于右padding
//设置字间距NSKernAttributeName:@1.5f
NSDictionary*dic =@{NSFontAttributeName:font,NSParagraphStyleAttributeName:paraStyle,NSKernAttributeName:@1.5f};
NSAttributedString*attributeStr = [[NSAttributedStringalloc]initWithString:strattributes:dic];
label.attributedText= attributeStr;
