我在這個問題上坐了幾個小時,現在我已經失明瞭。 ;-)writeToFile總是與stringByAppendingPathComponent一起崩潰
我有這樣的代碼在這裏:
- (id) initWithImage:(UIImageView*)imageView andPath: (NSString*) path{
[super init];
drawImage = imageView;
imageFilePath = [NSString stringWithString: path];
NSLog(@"fath: %@", imageFilePath);
return self;
}
NSData *imageData = [NSData dataWithData:UIImagePNGRepresentation(drawImage.image)];
NSString *docsDirectory = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString *path = [docsDirectory stringByAppendingPathComponent:@"img.data"];
NSLog(@"path: %@", path);
[imageData writeToFile:path atomically:YES];
此代碼的工作,但是當我改變
[imageData writeToFile:path atomically:YES];
到
[imageData writeToFile:imageFilePath atomically:YES];
應用程序崩潰。
但串看起來完全一樣:
2011-06-01 10:38:10.178 L3T[3756:207] fath: /Users/max/Library/Application Support/iPhone Simulator/4.3/Applications/A73945CF-9FD0-46E9-A16B-9C0EFC924B0F/Documents/img.data
2011-06-01 10:38:11.864 L3T[3756:207] path: /Users/max/Library/Application Support/iPhone Simulator/4.3/Applications/A73945CF-9FD0-46E9-A16B-9C0EFC924B0F/Documents/img.data
我只是不明白了!
imageFilePath的定義在哪裏?它是你班級中的一員嗎? imageFilePath何時分配並初始化? – 2011-06-01 08:48:53