// view分类方法

- (NSString*)encodeToBase64String:(UIImage*)image {

    return [UIImagePNGRepresentation(image) base64EncodedStringWithOptions:NSDataBase64Encoding64CharacterLineLength];

}

- (UIImage*)decodeBase64ToImage:(NSString*)strEncodeData {

    NSData *data = [[NSData alloc]initWithBase64EncodedString:strEncodeData options:NSDataBase64DecodingIgnoreUnknownCharacters];

    return[UIImageimageWithData:data];

}