UIlabel

行间距调整实现：

NSMutableAttributedString *attributedStringWifi = [[NSMutableAttributedStringalloc] initWithString:wifiLb.text];

NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStylealloc] init];

[paragraphStylesetLineSpacing:5];//调整行间距

[attributedStringWifiaddAttribute:NSParagraphStyleAttributeNamevalue:paragraphStyle range:NSMakeRange(0, [wifiLb.textlength])];

wifiLb.attributedText = attributedStringWifi;

[attributedStringWifirelease];

[paragraphStylerelease];