调用相机需要引入两个代理
UIImagePickerControllerDelegate,UINavigationControllerDelegate
否则出出现：
设置delegate时候，出现警告：Assigning to ‘id<UINavigationControllerDelegate,UIImagePickerControllerDelegate>’ from incompatible type ‘AddSightingViewController *const __strong’
解决过程】
1.问题很明显是 strong不兼容，然后就去试试，把相应的AddSightingViewController改一下，从
@property (nonatomic)
UIImagePickerController *imgPickerController;
改为：
@property (nonatomic,
weak) UIImagePickerController *imgPickerController;
然后就消除了此警告了。
注：有时候Xcode不能及时消除警告和错误，需要手动去Product->Clean一下。
【总结】
好像Property变量，如果不指定引用类型，则默认是strong引用，此处改为weak，即可解除此警告。
而另外关于weak，strong等更详细的含义，有空再整理。
//相机
-(void)takePhotoAction:(UIButton *)sender{
FZLog(nil,
nil);
//先设定sourceType为相机，然后判断相机是否可用（ipod）没相机，不可用将sourceType设定为相片库
if ([UIImagePickerController
isSourceTypeAvailable: UIImagePickerControllerSourceTypeCamera]) {
UIImagePickerController *picker = [[UIImagePickerController
alloc]
init];//初始化
picker.delegate =
self;
picker.allowsEditing =
YES;//设置可编辑
/*sourceType = UIImagePickerControllerSourceTypeCamera; //照相机
sourceType = UIImagePickerControllerSourceTypePhotoLibrary; //图片库
sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum; //保存的相片
*/
picker.sourceType =
UIImagePickerControllerSourceTypeCamera;
[self
presentViewController:picker animated:YES
completion:nil];//进入照相界面
}
}
// 打开相册：（区分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];//进入照相界面
}
//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;//是否允许编辑
picker.sourceType = sourceType;
/*
如果从一个导航按钮处呈现，使用：
presentPopoverFromBarButtonItem:permittedArrowDirections:animated:；
如果要从一个视图出呈现，使用：
presentPopoverFromRect:inView:permittedArrowDirections:animated:
如果设备旋转以后，位置定位错误需要在父视图控制器的下面方法里面重新定位：
didRotateFromInterfaceOrientation:（在这个方法体里面重新设置rect）
然后再次调用：
- (void)presentPopoverFromRect:(CGRect)rect inView:(UIView *)view permittedArrowDirections:(UIPopoverArrowDirection)arrowDirections animated:(BOOL)animated
*/
//UIPopoverController只能在ipad设备上面使用；作用是用于显示临时内容，特点是总是显示在当前视图最前端，当单击界面的其他地方时自动消失。
UIPopoverController *popover = [[UIPopoverController
alloc]initWithContentViewController:picker];
//permittedArrowDirections
设置箭头方向
[popover presentPopoverFromRect:CGRectMake(0,
0, 300,
300)
inView:self.view
permittedArrowDirections:UIPopoverArrowDirectionAny
animated:YES];
}
调用相机自定义《中文显示，相机全屏》
中文相机
在Iphone利用UIImagePickerController调用系统照相机一文中介绍了怎样调用系统照相机。但是有时候我需要自定义相机内容，需要以相机内容为背景，在其视图上添加其他控件，下面是相机试图最大化的实例。
-(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];//进入照相界面
}
targets->custom iOS target properties (Localization native development region设为China)