UIImage存为本地文件，UIImage转换为NSData

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UIImage *m_imgFore=......;

//png格式

NSData *imagedata=UIImagePNGRepresentation(m_imgFore);

//JEPG格式

//NSData?*imagedata=UIImageJEPGRepresentation(m_imgFore,1.0);

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

NSString *documentsDirectory=[paths objectAtIndex:0];?

NSString *savedImagePath=[documentsDirectory stringByAppendingPathComponent:@"saveFore.png"];

[imagedata writeToFile:savedImagePath atomically:YES];

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本地默认存放路径：

Finder---位置----app(用户名)---application support---iphone Sinulator---4.3---Applications--模拟器--

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