小编Sem*_*nko的帖子

当我尝试获取特定大小的图像时，PHImageManager.default().requestImage 会使用不同大小的图像调用两次。

这是代码：

static func load(from asset: PHAsset, targetSize: CGSize? = nil, completion: @escaping (UIImage?)->()) {
        let options = PHImageRequestOptions()
        options.isSynchronous = false
        let id = UUID()
        PHImageManager.default().requestImage(for: asset, targetSize: targetSize ?? PHImageManagerMaximumSize, contentMode: .aspectFill,
                options: options, resultHandler: { image, _ in
            print(id)
            runInMain {
                completion(image)
            }
        })
    }

我添加了 UUID 来检查相同的 UUID 是否打印了两次。

如何在iOS上创建像Instagram取消关注警报(两个按钮,图像和消息)的提醒？有没有现成的组件或我应该从头开发它？这是一个截图:

我想绘制一个简单的三角形，但在我尝试创建MTLBuffer.

static float vertexes[] = {
        0.0, 0.5, 0.0,
        -0.5f, -0.5f, 0.0,
        0.5, -0.5f, 0.0
};

id <MTLBuffer> buffer = [self.device newBufferWithBytes:vertexes
        length:sizeof(vertexes) options:MTLResourceStorageModePrivate];

这是断言：

-[MTLDebugDevice newBufferWithBytes:length:options:]:392: failed assertion `storageModePrivate incompatible with ...WithBytes variant of newBuffer'

那么如何使用 MTLResourceStorageModePrivate 选项从顶点创建缓冲区？

我想在 ActionBar 中创建一个带有文本和图标的按钮。类似于下面的屏幕截图。

我试过这个代码。但它不起作用。它只显示没有文字的图标。

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:id="@+id/create"
          android:title="@string/create"
          android:icon="@drawable/ic_apply"
          android:showAsAction="always|withText" />
</menu>

这是我的代码：

onView(withId(R.id.first_name)).perform(
                typeText("John"), closeSoftKeyboard());
SystemClock.sleep(5000);
onView(withId(R.id.last_name)).perform(typeText("Smith"));

我从这里尝试了答案 Android：java.lang.SecurityException：注入到另一个应用程序需要INJECT_EVENTS权限 ，但没有帮助。

这是我使用的Expresso版本：

// Android Test Support Libraries
    espressoRunnerVersion = "0.5"
    espressoRulesVersion = "0.5"
    espressoVersion = "2.2.2"

这是完整的堆栈跟踪：

android.support.test.espresso.PerformException: Error performing 'type text(Smith)' on view 'with id: church.life.app:id/last_name'.
at android.support.test.espresso.PerformException$Builder.build(PerformException.java:84)
at android.support.test.espresso.base.DefaultFailureHandler.getUserFriendlyError(DefaultFailureHandler.java:81)
at android.support.test.espresso.base.DefaultFailureHandler.handle(DefaultFailureHandler.java:52)
at android.support.test.espresso.ViewInteraction.waitForAndHandleInteractionResults(ViewInteraction.java:312)
at android.support.test.espresso.ViewInteraction.desugaredPerform(ViewInteraction.java:167)
at android.support.test.espresso.ViewInteraction.perform(ViewInteraction.java:110)
at church.life.app.ui.profile.ProfileSignupTest.InvalidSignupTest(ProfileSignupTest.java:44)
at java.lang.reflect.Method.invoke(Native Method)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at android.support.test.rule.ActivityTestRule$ActivityStatement.evaluate(ActivityTestRule.java:433)
at org.junit.rules.RunRules.evaluate(RunRules.java:20)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268) …

我想在下面的屏幕截图中创建一个提醒: