- 遵守协议，因为 UIImagePickerController 是继承至 UINavigationController，所以要遵守UINavigationControllerDelegate协议
<UIImagePickerControllerDelegate,UINavigationControllerDelegate>
- 初始化UIImagePickerController
- (void)selectImageSource {
UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];
imagePicker.delegate = self;
imagePicker.allowsEditing = YES;//编辑模式 但是编辑框是正方形的
// 使用前置还是后置摄像头
imagePickerVC.cameraDevice = UIImagePickerControllerCameraDeviceRear;
#// 设置可用的媒体类型、默认只包含kUTTypeImage
imagePickerVC.mediaTypes = @[(NSString *)kUTTypeMovie, (NSString *)kUTTypeImage];
UIAlertController *actionSheet = [UIAlertController alertControllerWithTitle:nil message:nil preferredStyle:UIAlertControllerStyleActionSheet];
UIAlertAction *cameraAction = [UIAlertAction actionWithTitle:@"从相机拍照" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]){
//设置照片来源
imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;
[self presentViewController:imagePicker animated:YES completion:nil];
}
}];
UIAlertAction *photoAction = [UIAlertAction actionWithTitle:@"从相册选择" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
[self presentViewController:imagePicker animated:YES completion:nil];
}];
UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {
NSLog(@"点击了取消");
}];
[actionSheet addAction:cameraAction];
[actionSheet addAction:photoAction];
[actionSheet addAction:cancelAction];
[self presentViewController:actionSheet animated:YES completion:nil];
}
#pragma mark - =======UIImagePickerControllerDelegate=========
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
[picker dismissViewControllerAnimated:YES completion:nil];
UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];
NSString *type = [info objectForKey:UIImagePickerControllerMediaType];
[self calulateImageFileSize:image];
//当选择的类型是图片
if ([type isEqualToString:@"public.image"]) {
switch (self.selectImageType) {
case ZCSelectImageTypeFace: {
[self.IdentityCardCell showFaceImage:image];
}
break;
case ZCSelectImageTypeBack: {
[self.IdentityCardCell showBackImage:image];
}
break;
case ZCSelectImageTypeBusiness: {
[self.businessLicenseCell showBusinessLicenseImage:image];
}
break;
}
}
}
字典info中key的含义
UIImagePickerControllerCropRect // 编辑裁剪区域
UIImagePickerControllerEditedImage // 编辑后的UIImage
UIImagePickerControllerMediaType // 返回媒体的媒体类型
UIImagePickerControllerOriginalImage // 原始的UIImage
UIImagePickerControllerReferenceURL // 图片地址
// 取消图片选择调用此方法
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {
[picker dismissViewControllerAnimated:YES completion:nil];
}
计算UIImage图片大小
- (void)calulateImageFileSize:(UIImage *)image {
NSData *data = UIImagePNGRepresentation(image);
if (!data) {
data = UIImageJPEGRepresentation(image, 0.5);//需要改成0.5才接近原图片大小，原因请看下文
}
double dataLength = [data length] * 1.0;
NSArray *typeArray = @[@"bytes",@"KB",@"MB",@"GB",@"TB",@"PB", @"EB",@"ZB",@"YB"];
NSInteger index = 0;
while (dataLength > 1024) {
dataLength /= 1024.0;
index ++;
}
NSLog(@"image = %.3f %@",dataLength,typeArray[index]);
}
参考：
https://blog.csdn.net/shihuboke/article/details/77150958
https://blog.csdn.net/w582324909/article/details/79625613
https://www.jianshu.com/p/48ffc684c881
https://www.jianshu.com/p/ea475f608526
