iOS UILabel 首行缩进

//label 需要缩进的label

// string label 赋值的文字

-(NSAttributedString *)parastyle:(UILabel *)label labelString:(NSString *)string

{

    

    NSMutableParagraphStyle *paraStyle = [[NSMutableParagraphStyle alloc] init];

    paraStyle.alignment = NSTextAlignmentLeft;  //对齐

    paraStyle.headIndent = 0.0f;//行首缩进

    //参数：（字体大小17号字乘以2，34f即首行空出两个字符）

    CGFloat emptylen = label.font.pointSize * 1;

    paraStyle.firstLineHeadIndent = emptylen;//首行缩进

    paraStyle.tailIndent = 0.0f;//行尾缩进

    paraStyle.lineSpacing = 2.0f;//行间距

    

    NSAttributedString *attrText = [[NSAttributedString alloc] initWithString:string attributes:@{NSParagraphStyleAttributeName:paraStyle}];

    

    return attrText;

}