我们项目iPad版本，视频类，所以强制横屏状态下，但是如果用户想打开相册，上传头像，会导致崩溃。所以做下笔记。
崩溃的原因是：强制横屏状态下，打开相册（相册需要竖屏），所以冲突导致crash，会直接崩到main里。
我的解决办法：
创建一个DJScreenManager单例，并添加横屏、竖屏属性。
------ .h
#import <Foundation/Foundation.h>
@interface DJScreenManager : NSObject
@property (nonatomic,assign) BOOL setVertical;
@property (nonatomic,assign) BOOL setHorizontal;
+ (instancetype)getInstance;
@end
------ .m
#import "DJScreenManager.h"
static DJScreenManager *_screenManager;
@implementation DJScreenManager
+ (instancetype)getInstance{
if (!_screenManager) {
_screenManager = [[DJScreenManager alloc]init];
}
return _screenManager;
}
@end
之后再appdelegate里，根据单例的属性，进行对应的旋转：
- (UIInterfaceOrientationMask)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window {
if ([DJScreenManager getInstance].setVertical) {
return UIInterfaceOrientationMaskPortrait;
}else{
return UIInterfaceOrientationMaskLandscapeLeft;
}
}
最后，只需要在打开相册的时候，设置竖屏，选取完或者取消的时候，设置回横屏就ok了：
- (IBAction)changeUserAvatar:(UIButton *)sender {
UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"请选择图片" message:nil preferredStyle:UIAlertControllerStyleAlert];
// UIAlertAction *cancel = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:nil];
UIImagePickerController *vc = [[UIImagePickerController alloc]init];
vc.delegate = self;
vc.allowsEditing = YES;
if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
UIAlertAction *cameraAction = [UIAlertAction actionWithTitle:@"相机" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action){
[vc setSourceType:UIImagePickerControllerSourceTypeCamera];
[self presentViewController:vc animated:YES completion:nil];
}];
[alert addAction:cameraAction];
}
UIAlertAction *albumAction = [UIAlertAction actionWithTitle:@"相册" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action){
[vc setSourceType:UIImagePickerControllerSourceTypePhotoLibrary];
[self presentViewController:vc animated:YES completion:nil];
}];
// [alert addAction:cancel];
[alert addAction:albumAction];
[DJScreenManager getInstance].setVertical = YES;
[DJScreenManager getInstance].setHorizontal = NO;
[self presentViewController:alert animated:YES completion:nil];
}
选取完或者取消：
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)image editingInfo:(nullable NSDictionary<NSString *,id> *)editingInfo NS_DEPRECATED_IOS(2_0, 3_0){
// NSData *data = UIImagePNGRepresentation(image);
NSData *data = UIImageJPEGRepresentation(image, 0.5);
self.imageData = [data base64EncodedStringWithOptions:NSDataBase64Encoding64CharacterLineLength];
self.userImage.image = [UIImage imageWithData:data];
[DJScreenManager getInstance].setVertical = NO;
[DJScreenManager getInstance].setHorizontal = YES;
[self dismissViewControllerAnimated:YES completion:nil];
}
//相机或相册的取消代理方法
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker
{
[DJScreenManager getInstance].setVertical = NO;
[DJScreenManager getInstance].setHorizontal = YES;
[self dismissViewControllerAnimated:YES completion:nil];
}
