調用相機需要引入兩個代理
UIImagePickerControllerDelegate,UINavigationControllerDelegate
否則出出現：
設置delegate時候，出現警告：Assigning to ‘id’ from incompatible type ‘AddSightingViewController *const __strong’
解決過程】
1.問題很明顯是 strong不兼容，然後就去試試，把相應的AddSightingViewController改一下，從
@property (nonatomic)
UIImagePickerController *imgPickerController;
改為：
@property (nonatomic,
weak) UIImagePickerController *imgPickerController;
然後就消除瞭此警告瞭。
註：有時候Xcode不能及時消除警告和錯誤，需要手動去Product->Clean一下。
【總結】
好像Property變量，如果不指定引用類型，則默認是strong引用，此處改為weak，即可解除此警告。
而另外關於weak，strong等更詳細的含義，有空再整理。
//相機
-(void)takePhotoAction:(UIButton *)sender{
FZLog(nil,
nil);
//先設定sourceType為相機，然後判斷相機是否可用（ipod）沒相機，不可用將sourceType設定為相片庫
if ([UIImagePickerController
isSourceTypeAvailable: UIImagePickerControllerSourceTypeCamera]) {
UIImagePickerController *picker = [[UIImagePickerController
alloc]
init];//初始化
picker.delegate =
self;
picker.allowsEditing =
YES;//設置可編輯
/*sourceType = UIImagePickerControllerSourceTypeCamera; //照相機
sourceType = UIImagePickerControllerSourceTypePhotoLibrary; //圖片庫
sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum; //保存的相片
*/
picker.sourceType =
UIImagePickerControllerSourceTypeCamera;
[self
presentViewController:picker animated:YES
completion:nil];//進入照相界面
}
}
// 打開相冊：（區分pad和iphone）
-(void)openPhotosAction:(UIButton *)sender{
// for iphone：
UIImagePickerController *pickerImage = [[UIImagePickerController
alloc]
init];
if([UIImagePickerController
isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary]) {
pickerImage.sourceType =
UIImagePickerControllerSourceTypePhotoLibrary;
//pickerImage.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;
pickerImage.mediaTypes = [UIImagePickerController
availableMediaTypesForSourceType:pickerImage.sourceType];
}
pickerImage.delegate =
self;
pickerImage.allowsEditing =
NO;
[self
presentViewController:pickerImage animated:YES
completion:nil];//進入照相界面
}
//for ipad:
-(void)ipadPicker{
UIImagePickerControllerSourceType sourceType =
UIImagePickerControllerSourceTypePhotoLibrary;
//sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum; //保存的相片
UIImagePickerController *picker = [[UIImagePickerController
alloc]
init];
picker.delegate =
self;
picker.allowsEditing =
NO;//是否允許編輯
picker.sourceType = sourceType;
/*
如果從一個導航按鈕處呈現，使用：
presentPopoverFromBarButtonItem:permittedArrowDirections:animated:；
如果要從一個視圖出呈現，使用：
presentPopoverFromRect:inView:permittedArrowDirections:animated:
如果設備旋轉以後，位置定位錯誤需要在父視圖控制器的下面方法裡面重新定位：
didRotateFromInterfaceOrientation:（在這個方法體裡面重新設置rect）
然後再次調用：
– (void)presentPopoverFromRect:(CGRect)rect inView:(UIView *)view permittedArrowDirections:(UIPopoverArrowDirection)arrowDirections animated:(BOOL)animated
*/
//UIPopoverController隻能在ipad設備上面使用；作用是用於顯示臨時內容，特點是總是顯示在當前視圖最前端，當單擊界面的其他地方時自動消失。
UIPopoverController *popover = [[UIPopoverController
alloc]initWithContentViewController:picker];
//permittedArrowDirections
設置箭頭方向
[popover presentPopoverFromRect:CGRectMake(0,
0, 300,
300)
inView:self.view
permittedArrowDirections:UIPopoverArrowDirectionAny
animated:YES];
}
調用相機自定義《中文顯示，相機全屏》
中文相機
在Iphone利用UIImagePickerController調用系統照相機一文中介紹瞭怎樣調用系統照相機。但是有時候我需要自定義相機內容，需要以相機內容為背景，在其視圖上添加其他控件，下面是相機試圖最大化的實例。
-(void)onClickbutton:(id)sender
{
UIImagePickerController *controller = [[UIImagePickerController
alloc]
init];
[controller setSourceType:UIImagePickerControllerSourceTypeCamera];
[controller
setShowsCameraControls:NO];
CGAffineTransform cameraTransform =
CGAffineTransformMakeScale(1.25,1.25);
controller.cameraViewTransform = cameraTransform;
[self
presentViewController:controller animated:YES
completion:nil];//進入照相界面
}
targets->custom iOS target properties (Localization native development region設為China)