解决办法：
添加一个底部的view
let countdownBtn = UIButton.init(frame: CGRectMake(-10, 0, 62, 28)) let rightBackView = UIView.init(frame:CGRectMake(0, 0, 72, 28)) rightBackView.addSubview(countdownBtn) textFeild.rightView = rightBackView
rightview 如何设置左边距
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转载自20142014.iteye.com/blog/2288823
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