去掉字符串中的空格跟回车 获取键盘高度 判断字符串是否为空 swift
去掉字符串中的空格和回车 获取键盘高度 判断字符串是否为空 swift
<span style="font-size:18px;">//判断字符串是否为空 func trimString(#str:String)->String{ var nowStr = str.stringByTrimmingCharactersInSet(NSCharacterSet.whitespaceCharacterSet()) return nowStr } //去除空格和回车 func trimLineString(#str:String)->String{ var nowStr = str.stringByTrimmingCharactersInSet(NSCharacterSet.whitespaceAndNewlineCharacterSet()) return nowStr } //根据键盘监控 获取键盘高度 func getKeyBoardHeight(#aNotification:NSNotification)->CGFloat{ var uInfo = aNotification.userInfo as NSDictionary! let avalue = uInfo["UIKeyboardFrameEndUserInfoKey"] as NSValue let keyrect : CGRect = avalue.CGRectValue() let keyheight : CGFloat = keyrect.size.height; return keyheight }</span>