CAGradientLayer *_gradientLayer;
UIView *_layerView;
_layerView = [[UIView alloc] initWithFrame:CGRectMake(0, self.iconImageView.height - SetHeight(30), self.iconImageView.width, SetHeight(30))];
_gradientLayer = [CAGradientLayer layer]; // 设置渐变效果
_gradientLayer.bounds = _layerView.bounds;
_gradientLayer.borderWidth = 0;
_gradientLayer.frame = _layerView.bounds;
_gradientLayer.colors = [NSArray arrayWithObjects:
(id)[[UIColor clearColor] CGColor],
(id)[[UIColor blackColor] CGColor],nil];
_gradientLayer.startPoint = CGPointMake(0.2, 0.2);
_gradientLayer.endPoint = CGPointMake(0.2, 1.0);
[_layerView.layer insertSublayer:_gradientLayer atIndex:0];
[self.iconImageView addSubview:_layerView];
[_layerView addSubview:self.AcountNumLabel];