我有一个使用非加密领域数据库的iOS应用程序.
现在我想对该数据库应用加密.
我可以使用以下方法设置加密密钥:
Realm.setEncryptionKey(key, forPath: Realm.defaultPath)
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然后领域将加密现有的数据库?
或者我是否需要使用加密创建新的域数据库文件,然后将现有数据库中的数据移动到新的加密数据库?
我设法用DNNRegressor编写TensorFlow python程序.我已经训练了模型,并且能够通过手动创建的输入(常量张量)从Python中获得模型的预测.我也能够以二进制格式导出模型.
import pandas as pd
import numpy as np
import tensorflow as tf
from tensorflow.python.framework import graph_util
#######################
# Setup
#######################
# Converting Data into Tensors
def input_fn(df, training = True):
# Creates a dictionary mapping from each continuous feature column name (k) to
# the values of that column stored in a constant Tensor.
continuous_cols = {k: tf.constant(df[k].values)
for k in continuous_features}
feature_cols = dict(list(continuous_cols.items()))
if training:
# Converts the label column into a constant Tensor.
label = …Run Code Online (Sandbox Code Playgroud) 我相信 XCode 错误地报告了我的 Swift Access Race SynchronizedDictionary- 或者是这样?
我的SynchronizedDictionary看起来像这样:
public struct SynchronizedDictionary<K: Hashable, V> {
private var dictionary = [K: V]()
private let queue = DispatchQueue(
label: "SynchronizedDictionary",
qos: DispatchQoS.userInitiated,
attributes: [DispatchQueue.Attributes.concurrent]
)
public subscript(key: K) -> V? {
get {
return queue.sync {
return self.dictionary[key]
}
}
mutating set {
queue.sync(flags: .barrier) {
self.dictionary[key] = newValue
}
}
}
}
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以下测试代码将触发“Swift Access Race”问题(当为该方案打开Thread Sanitizer时):
var syncDict = SynchronizedDictionary<String, String>()
let setExpectation = XCTestExpectation(description: "set_expectation")
let getExpectation …Run Code Online (Sandbox Code Playgroud) xcode multithreading race-condition swift ios-multithreading