iOS 任意页面摇一摇并截屏保存到相册

#warning 使用UIWindow category（扩展类）创建本类

#import <UIKit/UIKit.h>

#import <Foundation/Foundation.h>

#define UIEventSubtypeMotionShakeNotification @"UIEventSubtypeMotionShakeNotification"

@interface UIWindow (Motion)

- (BOOL)canBecomeFirstResponder;

- (void)motionEnded:(UIEventSubtype)motion withEvent:(UIEvent *)event;

@end

#import "UIWindow+Motion.h"

#import <AudioToolbox/AudioToolbox.h>

#import <AssetsLibrary/AssetsLibrary.h>

@implementation UIWindow (Motion)

- (BOOL)canBecomeFirstResponder {//默认是NO，所以得重写此方法，设成YES

    return YES;

}

- (void)motionBegan:(UIEventSubtype)motion withEvent:(UIEvent *)event {

     NSLog(@"开始摇一摇");

}

- (void)motionEnded:(UIEventSubtype)motion withEvent:(UIEvent *)event {

    AudioServicesPlaySystemSound(kSystemSoundID_Vibrate);

    

    AudioServicesPlaySystemSound(1007);

    // 方法1

//    [self saveImage:[self captureImageFromView:self]];

    // 方法二

    UIImageWriteToSavedPhotosAlbum([self captureImageFromView:self], self,  nil , nil ) ;

    

    NSLog(@"摇一摇结束");

}

- (void)motionCancelled:(UIEventSubtype)motion withEvent:(UIEvent *)event {

    NSLog(@"摇一摇取消");

}

// 保存图片到相册功能 

- (void)saveImage:(UIImage*)image {

    ALAssetsLibrary *assetsLibrary = [[ALAssetsLibrary alloc]init];

    [assetsLibrary writeImageToSavedPhotosAlbum:[image CGImage] orientation:(ALAssetOrientation)image.imageOrientation completionBlock:^(NSURL *assetURL, NSError *error) {

        if (error) {

            NSLog(@"保存失败：%@",error);

        }else{

            NSLog(@"保存成功");

        }

    }];

}

//截屏

-(UIImage *)captureImageFromView:(UIView *)view {

    CGRect screenRect = [view bounds];

    UIGraphicsBeginImageContext(screenRect.size);

    CGContextRef ctx = UIGraphicsGetCurrentContext();

    [view.layer renderInContext:ctx];

    UIImage * image = UIGraphicsGetImageFromCurrentImageContext();

    UIGraphicsEndImageContext();

    return image;

}

@end