iOS button 按钮 设置渐变或者layer之后无法展示文字或者图片

CAGradientLayer *gl = [CAGradientLayer layer]

 gl.frame = CGRectMake(0,0,100,24)

gl.startPoint = CGPointMake(0, 0)

  gl.endPoint = CGPointMake(1, 1)

  gl.colors = @[( __bridge id )[UIColor colorWithRed:0/255.0 green:168/255.0 blue:79/255.0 alpha:1.0].CGColor,( __bridge id )[UIColor colorWithRed:26/255.0 green:186/255.0 blue:74/255.0 alpha:1.0].CGColor]

gl.locations = @[@(0.0),@(1.0f)]

 [_continueStudyBtn.layer addSublayer:gl]

1.解决方法。背景放在最底层

   [_continueStudyBtn.layer insertSublayer:gl atIndex:0]

    [_continueStudyBtn bringSubviewToFront:_continueStudyBtn.imageView]

如果你没有使用AutoLayout

你需要改变button.frame = CGRectMake(xx, xx, 能够显示全文字的合适宽度, 比字体大2.0f的高度)

如果你使用了AutoLayout

你需要改变button的width Constraint至能够显示全文字的合适宽度.

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