的UIImage設置圖像withfile在高速緩存目錄

Question

我得到無圖像當我試圖從本地文件路徑（緩存目錄） 文件中設置圖像：/// ......

NSString* localImagePath=@"file:///Users/mac/Library/Application%20Support/iPhone%20Simulator/7.1/Applications/BD2135B6-5E03-4797-960E-B6C2BF2D6958/Library/Caches/myImage.jpeg" 
[[UIImage alloc]initWithContentsOfFile:localImagePath]; 

我搜索通過許多問題，但無法找到正確的方法來做到這一點。

Answer 1

可能的問題是URL編碼的，所以我解決了這個通過獲取緩存目錄路徑

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES); 
    NSString *cacheDirectory = [paths objectAtIndex:0]; 
    NSString *localImagePath = [cacheDirectory stringByAppendingPathComponent:@"myImage.jpeg"]; 
    [[UIImage alloc]initWithContentsOfFile:localImagePath]; 

Answer 2

- (IBAction)saveImage { 
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 
NSString *documentsDirectory = [paths objectAtIndex:0]; 
NSString *savedImagePath = [documentsDirectory stringByAppendingPathComponent:@"savedImage.png"]; 
UIImage *image = imageView.image; // imageView is my image from camera 
NSData *imageData = UIImagePNGRepresentation(image); 
[imageData writeToFile:savedImagePath atomically:NO]; 
}