將JPG圖像從文檔保存到相冊 - 示例代碼

Question

我生成了JPG圖像，保存到Documents文件夾，但不包含在軟件包中。 請幫助建築類將其保存到圖庫。

與 kviksilver

幫助

Finnaly爲了使完整的解決方案：

//的Tools.h

#import <Foundation/Foundation.h> 
#import <UIKit/UIKit.h> 

@interface tools : NSObject { 

} 

@end 

// tools.m

#import "tools.m" 

@implementation tools 

-(IBAction)saveImage{ 

    NSArray *paths=NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 
    NSString *documentsDirectory=[paths objectAtIndex:0]; 
    NSString *imagePath=[documentsDirectory stringByAppendingPathComponent:@"file7.jpg"]; 
    UIImage *image=[UIImage imageWithContentsOfFile:imagePath]; 
    UIImageWriteToSavedPhotosAlbum(image, self,@selector(savedPhotoImage:didFinishSavingWithError:contextInfo:), nil); 
} 
@end 

到底有沒有從CPP包裝器調用它：

void onCPPSaveImgToCamRoll () 
{ 
    return saveImage; 
} 

Answer 1

嘗試獲得的ImagePath這樣的：

NSArray *paths=NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 
NSString *documentsDirectory=[paths objectAtIndex:0]; 
NSString *imagePath=[documentsDirectory stringByAppendingPathComponent:@"Image.jpg"]; 

然後設置圖像：

UIImage *image=[UIImage imageWithContentsOfFile:imagePath]; 
UIImageWriteToSavedPhotosAlbum(image, self,@selector(savedPhotoImage:didFinishSavingWithError:contextInfo:), nil); 

savedPhotoImage：didFinishSavingWithError：contextInfo：完成保存或不

時要調用的創建你班上的兩種方法：

-(void)saveImage{ 

NSArray *paths=NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 

NSString *documentsDirectory=[paths objectAtIndex:0]; 

NSString *imagePath=[documentsDirectory stringByAppendingPathComponent:@"Image.jpg"]; 

UIImage *image=[UIImage imageWithContentsOfFile:imagePath]; 

UIImageWriteToSavedPhotosAlbum(image, self,@selector(savedPhotoImage:didFinishSavingWithError:contextInfo:), nil); 


} 
- (void)savedPhotoImage:(UIImage *)image didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInf{ 

// possible error handling 

} 

你應該沒問題 -

Answer 2

你的答案在UIImage類參考的第一頁。

 
void UIImageWriteToSavedPhotosAlbum (
    UIImage *image, 
    id  completionTarget, 
    SEL  completionSelector, 
    void  *contextInfo 
);