//// ViewController.m// iPhoneXPhotoEdit//// Created by yfc on 2017/12/23.// Copyright © 2017年 yfc. All rights reserved.//#import "ViewController.h"#import <AssetsLibrary/AssetsLibrary.h>#import <Photos/Photos.h>@interface ViewController ()@end@implementation ViewController- (void)viewDidLoad { [super viewDidLoad];  UIButton *btn = [[UIButton alloc]init]; btn.frame = CGRectMake(10, 44, 350, 758); btn.frame = CGRectMake(0, 0, 375, 812); [btn setBackgroundImage:[UIImage imageNamed:@"IMG_3655.PNG"] forState:UIControlStateNormal]; //添加圓角 btn.layer.cornerRadius = 35 ; btn.layer.borderColor = [UIColor blackColor].CGColor; btn.layer.borderWidth = 2; [self.view addSubview:btn]; btn.backgroundColor = [UIColor whiteColor]; btn.clipsToBounds = YES;   //添加劉海 UIImageView *imageView = [[UIImageView alloc]initWithImage:[UIImage imageNamed:@"liuhai.png"]]; imageView.frame = CGRectMake(70, 0, 222, 28); [btn addSubview:imageView];  self.view.backgroundColor = [UIColor clearColor];  //截圖保存到相冊 dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(1 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{  [self saveBtnAction:nil]; }); }-(void)saveBtnAction:(UIButton *)sender{ [self requestAuthorizationStatus];}//查看權限- (void)requestAuthorizationStatus{ [PHPhotoLibrary requestAuthorization:^(PHAuthorizationStatus status){  dispatch_async(dispatch_get_main_queue(), ^{   switch (status) {    case PHAuthorizationStatusAuthorized:    {     [self cutScreen];     break;    }    default://Denied    {     break;    }   }  }); }];}//截屏-(void)cutScreen{ UIGraphicsBeginImageContextWithOptions(self.view.bounds.size, YES, 0.0); //2.獲取當前圖形上下文 CGContextRef ctx = UIGraphicsGetCurrentContext(); //3.獲取需要截取的view的layer [self.view.layer renderInContext:ctx]; //4.從當前上下文獲取圖片 UIImage *image = UIGraphicsGetImageFromCurrentImageContext(); //5.關閉圖形上下文 UIGraphicsEndImageContext(); //6.把圖片保存到相冊 UIImageWriteToSavedPhotosAlbum(image, self, @selector(image:didFinishSavingWithError:contextInfo:), NULL);}//保存成功后回調-(void)image:(UIImage *)image didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo{ NSString *msg = nil; if (error) {  msg = @"圖片保存失敗"; }else{  msg = @"圖片保存成功"; } UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"提示" message:msg delegate:self cancelButtonTitle:@"確定" otherButtonTitles:nil, nil]; [alertView show];}@end