UIImagePicker崩潰在ios7/iphone 4s

Question

我有一個應用程序，它使用UIImagePickerController來允許用戶拍照。

我已經將測試用例簡化爲單個視圖控制器應用程序中最簡單的順序。這是我的代碼。

// 
// CTViewController.h 
// Camera Test 
// 

#import <UIKit/UIKit.h> 

@interface CTViewController : UIViewController <UINavigationControllerDelegate, UIImagePickerControllerDelegate> 

@property (nonatomic, retain) UIImagePickerController *cameraController; 

- (IBAction)takePicture:(id)sender; 

@end 

代碼的體如下：

// 
// CTViewController.m 
// Camera Test 

#import "CTViewController.h" 

.... 

- (void)didReceiveMemoryWarning 
{ 
    NSLog(@"%s", __func__); 

    [super didReceiveMemoryWarning]; 
    // Dispose of any resources that can be recreated. 
} 

- (IBAction)takePicture:(id)sender 
{ 
    self.cameraController = [[UIImagePickerController alloc] init]; 

    self.cameraController.sourceType = UIImagePickerControllerSourceTypeCamera; 
    self.cameraController.allowsEditing = YES; 
    self.cameraController.delegate = self; 
    [self presentViewController:self.cameraController animated:YES completion:nil]; 
} 

「takePicture」被掛接到一個按鈕，我可以在屏幕的中間壓。

在ios 6上一切正常，但在ios 7上，一旦viewcontroller出現，我會得到一連串的內存警告。因此：

Snapshotting a view that has not been rendered results in an empty snapshot. Ensure your view has been rendered at least once before snapshotting or snapshot after screen updates. 
Received memory warning. 
-[CTViewController didReceiveMemoryWarning] 

.... <here I take a picture, which I do nothing with> 

Received memory warning. 
-[CTViewController didReceiveMemoryWarning] 
Received memory warning. 
-[CTViewController didReceiveMemoryWarning] 

.... <I get a cascade of these warnings> 

的應用程序使用的IOS，如果我建立一個與IOS 6.1的SDK，但ios7運行7.0 SDK使用Xcode的5同樣的問題時建造的。使用ios 6.1 sdk構建並在ios 6.1.3上運行不會導致任何消息和問題。

我的完整應用程序在ios 7上崩潰了50％。我通過拋出大量內容（圖像大多數）內存不足和分析來回應內存警告，但我仍然得到警告級聯（即在內存釋放後它們繼續）。

如果我使用前置攝像頭，從圖庫中選擇或使用iPad 3，則沒有消息。因此，當使用後置攝像頭時，我懷疑內存問題與UIImagePickerController的大小有關。

我有充分的探討和計算器都顯得格外這個帖子 - UIImagePickerController error: Snapshotting a view that has not been rendered results in an empty snapshot in iOS 7

我已經試過各種建議，但我的簡單測試應用程序阻止大多數的解釋。

有什麼想法？我應該放棄對iPhone 4S的支持嗎？我還沒有確認iPhone 5的問題，但我會盡快更新這個問題。

:-)

Answer 1

我建議你不要使用圖片選擇器的屬性，有一個本地對象，而不是。看下面我的代碼，IOS7也很好。

if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) 
{ 
    UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init]; 
    imagePicker.delegate = self; 
    imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera; 
    imagePicker.showsCameraControls = YES; 

    [self presentViewController:imagePicker animated:YES completion:nil]; 
}