Label字间间隔

- (void)Address{
NSMutableAttributedString * attributedString1 = [[NSMutableAttributedString alloc] initWithString:_testString];
NSMutableParagraphStyle * paragraphStyle1 = [[NSMutableParagraphStyle alloc] init];
[paragraphStyle1 setLineSpacing:15];
[attributedString1 addAttribute:NSParagraphStyleAttributeName value:paragraphStyle1 range:NSMakeRange(0, [_testString length])];
[_cLabel setAttributedText:attributedString1];
[_cLabel sizeToFit];
}