（IOS）将一个view保存为pdf格式

- (void)createPDFfromUIView:(UIView*)aView saveToDocumentsWithFileName:(NSString*)aFilename

{

    NSMutableData *pdfData = [NSMutableData data];

    UIGraphicsBeginPDFContextToData(pdfData, aView.bounds, nil);

    UIGraphicsBeginPDFPage();

    CGContextRef pdfContext = UIGraphicsGetCurrentContext();

    [aView.layerrenderInContext:pdfContext];

    UIGraphicsEndPDFContext();

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

    NSString* documentDirectory = [documentDirectoriesobjectAtIndex:0];

    NSString* documentDirectoryFilename = [documentDirectorystringByAppendingPathComponent:aFilename];

    [pdfDatawriteToFile:documentDirectoryFilenameatomically:YES];

    NSLog(@"documentDirectoryFileName: %@",documentDirectoryFilename);

}