设置圆角Button

button.layer.borderColor = UIColor.whiteColor().CGColor;

button.layer.borderWidth= 2;

button.layer.cornerRadius= 16;

设置圆角边框TextView

inputTextView.layer.borderColor = UIColor(red: 60/255,green: 40/255,blue: 129/255,alpha: 1).CGColor;

inputTextView.layer.borderWidth = 1;

inputTextView.layer.cornerRadius = 16;