美图秀秀美化图片之【增强】模块界面与功能设计 - iOS

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美图秀秀美化图片之【增强】模块界面与功能设计(六)

2017-10-12 12:09:18 【大中小】浏览:1078次

Image:[UIImage imageNamed:[normalImageArr objectAtIndex:i]] ]; item.title = [textArr objectAtIndex:i]; [arr addObject:item]; } self.styleBar.items = arr; self.styleBar.delegate = self; [self.styleBar setSelectedItem:[self.styleBar.items objectAtIndex:0]]; [self.view addSubview:self.styleBar]; [self effectBar:self.styleBar didSelectItemAtIndex:0]; } - (void)setupSliderForColorList { UIView *subview = [[UIView alloc] initWithFrame:CGRectMake(0, HEIGHT - 115 - 40, WIDTH, 40)]; subview.backgroundColor = [UIColor colorWithRed:0 green:0 blue:0 alpha:0.5]; [self.view addSubview:subview]; self.slider = [[FWSlider alloc] initWithFrame:CGRectZero]; self.slider.minimumValue = -100; self.slider.maximumValue = 100; self.slider.value = 0; self.slider.frame = CGRectMake(WIDTH / 2 - 100, 10, 200, 20); [self.slider addTarget:self action:@selector(updateva lue:) forControlEvents:UIControlEventTouchUpInside]; [self.slider addTarget:self action:@selector(updateTipView:) forControlEvents:UIControlEventValueChanged]; [self.slider setThumbImage:[UIImage imageNamed:@"icon_slider_thumb"] forState:UIControlStateNormal]; [subview addSubview:self.slider]; self.slider.tipView.currentValueLabel.text = [NSString stringWithFormat:@"%f",self.slider.value]; }

不同页面的方法

- (void)displayAutoBeautyPage
{
    [self setupImageView];
    [self setupBar];
}

- (void)displayColorListPage
{
    [self setupImageView];
    [self setupBar];
    [self setupSliderForColorList];
}

- (void)displayEditPage
{
    [self setupImageView];
    [self setupBar];
    [self setupButtons];
}

 if ([text isEqualToString:@"智能优化"])
    {
        FWFunctionViewController *vc = [[FWFunctionViewController alloc] initWithImage:self.image type:FWBeautyProcessTypeAutoBeauty];
        [self presentViewController:vc animated:YES completion:^{
        }];
        [vc displayAutoBeautyPage];
    }
    else if ([text isEqualToString:@"增强"])
    {
        FWFunctionViewController *vc = [[FWFunctionViewController alloc] initWithImage:self.image type:FWBeautyProcessTypeColorList];
        [self presentViewController:vc animated:YES completion:^{
        }];
        [vc displayColorListPage];
    }
    else if ([text isEqualToString:@"编辑"]) {
        FWFunctionViewController *vc = [[FWFunctionViewController alloc] initWithImage:self.image type:FWBeautyProcessTypeEdit];
        [self presentViewController:vc animated:YES completion:^{
        }];
        [vc displayEditPage];
        
        //                CGRect frame1 = CGRectMake(87.5, 550, 200, 20);
        //                [vc setupSliderWithFrame:frame1];
    }e

　　五、功能实现

1.亮度的实现

+ (UIImage *)changeva lueForBrightnessFilter:(float)value image:(UIImage *)image;
{
    GPUImageBrightnessFilter *filter = [[GPUImageBrightnessFilter alloc] init];
    filter.brightness = value;
    [filter forceProcessingAtSize:image.size];
    GPUImagePicture *pic = [[GPUImagePicture alloc] initWithImage:image];
    [pic addTarget:filter];

    [pic processImage];
    [filter useNextFrameForImageCapture];
    return [filter imageFromCurrentFramebuffer];
}

该功能使用了GPUImage库中的GPUImageBrightnessFilter滤镜，具体介绍请参考GPUImage简单滤镜使用（一）

2.对比度的实现

GPUImageContrastFilter *filter = [[GPUImageContrastFilter alloc] ini

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