objective-c 我的美图软件

// ViewController.m
// 我的美图软件
//
// Created by DC017 on 16/1/5.
// Copyright © 2016年 DC017. All rights reserved.
//

#import "ViewController.h"

@interface ViewController ()<UINavigationControllerDelegate,UIImagePickerControllerDelegate>
{ //相册视图控制器
UIImagePickerController * imagePickerController;
UIImage * image;
//是滤镜里面的
CIImage * zhiqianimage;//编辑之前
//是滤镜里面的
CIImage * zhihouimage;//编辑之后
//滤镜
CIFilter * filter;
//上下文
CIContext * context;
}
@end

@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
//相册视图控制器
imagePickerController=[[UIImagePickerController alloc]init];
imagePickerController.delegate=self;
//自适应图片大小
_imageView.contentMode=UIViewContentModeScaleAspectFit;
//初始化滤镜
filter=[CIFilter filterWithName:@"CIColorControls"];
//初始化上下文
context=[CIContext contextWithOptions:nil];
}

//协议里的方法
-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info{
//关闭相册（从那来回那我去）
[self dismissViewControllerAnimated:YES completion:nil];
//获取选择的图片
image=[info objectForKey:UIImagePickerControllerOriginalImage];
_imageView.image=image;
//初始化CI
zhiqianimage=[CIImage imageWithCGImage:[image CGImage]];
[filter setValue:zhiqianimage forKey:@"inputImage"];
}
//打开相册
- (IBAction)daikaixiangce:(id)sender {
//模态跳转（针对视图控制器）
[self presentViewController:imagePickerController animated:YES completion:nil];
}

- (IBAction)baocunzhaopain:(id)sender {
//保存到相册
UIImageWriteToSavedPhotosAlbum(_imageView.image, nil, nil, nil);
//实例化弹出框
UIAlertController * tanChuKuang=[UIAlertController alertControllerWithTitle:@"信息" message:@"保存成功" preferredStyle:UIAlertControllerStyleAlert];
//设置弹出框属性
[tanChuKuang addAction:[UIAlertAction actionWithTitle:@"ok" style:UIAlertActionStyleDefault handler:nil]];
//模态跳转到弹出框
[self presentViewController:tanChuKuang animated:YES completion:nil];
}
//CI->CG->UI
-(void)setimage{
//取出输出图片
zhihouimage=[filter outputImage];
CGImageRef temp=[context createCGImage:zhihouimage fromRect:[zhiqianimage extent]];
_imageView.image=[UIImage imageWithCGImage:temp];
CGImageRelease(temp);
}
//调节饱和度
- (IBAction)baohedu:(id)sender {
//inputSaturation 饱和度
[filter setValue:[NSNumber numberWithFloat:_baoheduzhi.value] forKey:@"inputSaturation"];
[self setimage];
}

//调节亮度
- (IBAction)liangdu:(id)sender {
//inputBrightness 亮度
[filter setValue:[NSNumber numberWithFloat:_liangduzhi.value] forKey:@"inputBrightness"];
[self setimage];
}
//调节对比度
- (IBAction)duibidu:(id)sender {
//inputContrast 对比度
[filter setValue:[NSNumber numberWithFloat:_duibiduzhi.value] forKey:@"inputContrast"];
[self setimage];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];

}
@end