iOS UILabel行间距字间距

NSMutableDictionary *attr = [NSMutableDictionary dictionary];
//字间距（NSKernAttributeName）
attr[NSKernAttributeName] = @5;
//行间距（NSParagraphStyleAttributeName）
NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
[paragraphStyle setLineSpacing:5];
attr[NSParagraphStyleAttributeName] = paragraphStyle;

myLabel.attributedText = [[NSAttributedString alloc]initWithString:myLabel.text attributes:attr];
myLabel.numberOfLines = 0;
myLabel.lineBreakMode = NSLineBreakByWordWrapping;