本篇文章主要介绍了"iOS 打开相册，保存图片到相册，打开相机"，主要涉及到保存图片,IOS方面的内容，对于IOS开发感兴趣的同学可以参考一下：
在开发过程中我们经常会用到相册与相机下面我讲一下相册与相机的基本操作: 1. 打开相册2. 保存图片到相册3. 打开相机
1，打开相册//1. 要遵循代理
&...
// 1.// 定义个全局 UIImageView
_imageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"logo"]];
_imageView.frame = CGRectMake(kScreen_Width/2-100, kScreen_Height/2-70, 200, 200);
[self.view addSubview:_imageView];
// 启动用户交互
_imageView.userInteractionEnabled = YES;
// 手势 长按
UILongPressGestureRecognizer *longAccording = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longAccordingAction:)];
[_imageView addGestureRecognizer:longAccording];
//2.#pragma mark - 长按 执行的方法
- (void)longAccordingAction:(UILongPressGestureRecognizer *)sender {
NSLog(@"长按");
if (sender.state == UIGestureRecognizerStateBegan) {
// 定义个提示框
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"是否要保存到相册" message:nil preferredStyle:UIAlertControllerStyleAlert];
UIAlertAction *action1 = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
}];
[alertController addAction:action1];
UIAlertAction *action = [UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
// 关键代码在这里
UIImageWriteToSavedPhotosAlbum(_imageView.image, self, @selector(image:didFinishSavingWithError:contextInfo:), NULL);
}];
[alertController addAction:action];
[self presentViewController:alertController animated:YES completion:^{
}];
}
}
//3.#pragma mark - 保存图片成功后 回调一个方法
- (void)image:(UIImage *)image didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo;
{
NSString *msg=nil;
if (!error)
{
msg=@"保存成功";
}
else
{
msg=@"保存失败";
}
NSLog(@"%@",msg);
}
效果图：
3，打开相机
//1. 要遵循 代理//2. 自定义一个按钮UIButton *btn = [UIButton buttonWithType:UIButtonTypeSystem];
[btn setTitle:@"打开相机" forState:UIControlStateNormal];
btn.frame = CGRectMake(100, 100, 100, 100);
[btn addTarget:self action:@selector(toQRCode:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:btn];
//3. 执行按钮的方法
- (void)toQRCode:(UIButton *)btn {
NSLog(@"打开相机");
UIImagePickerController *picker=[[UIImagePickerController alloc] init];
picker.sourceType=UIImagePickerControllerSourceTypeCamera;
picker.delegate=self;
picker.allowsEditing=YES;
[self presentViewController:picker animated:YES completion:nil];
}
要打开相机 只有真机才能实现
这里就不演示了 请见谅。
解决：调用系统相册、相机发现是英文状态。
