1 - (void)setupDurationLabelBgView
2 {
3 CGFloat bgimageViewWidth = 165 * kBigScreenViewWidthRate;
4 CGFloat bgimageViewHeight = 20 * kBigScreenViewWidthRate;
5
6 UIView *durationLabelBgView = [[UIView alloc] init];
7 [_imgView addSubview:durationLabelBgView];
8 [durationLabelBgView mas_makeConstraints:^(MASConstraintMaker *make) {
9 make.left.right.bottom.mas_equalTo(_imgView);
10 make.height.mas_equalTo(bgimageViewHeight);
11 }];
12 UIColor *color1 = UIColorFromHexWithAlpha(0x000000, 0);
13 UIColor *color2 = UIColorFromHexWithAlpha(0x000000, 1);
14 CAGradientLayer *commonLayer = [self gradientLayerWithColor1:color1 color2:color2];
15 commonLayer.frame = CGRectMake(0, 0, bgimageViewWidth, bgimageViewHeight);
16 [durationLabelBgView.layer addSublayer:commonLayer];
17 }
18
19 - (CAGradientLayer *)gradientLayerWithColor1:(UIColor *)color1 color2:(UIColor *)color2{
20 //初始化CAGradientlayer对象，使它的大小为UIView的大小
21 CAGradientLayer *gradientLayer = [CAGradientLayer layer];
22
23 //设置渐变区域的起始和终止位置（范围为0-1）
24 gradientLayer.startPoint = CGPointMake(0, 0);
25 gradientLayer.endPoint = CGPointMake(1, 0);
26
27 gradientLayer.colors = @[(__bridge id)color1.CGColor,
28 (__bridge id)color2.CGColor];
29 //设置颜色分割点（范围：0-1）
30 gradientLayer.locations = @[@(0.0f), @(0.6)];
31
32 return gradientLayer;
33 }
