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问题描述
什么是伞头？有什么用？我收到了一个警告，如下所示。这是什么意思？
What is basically an umbrella header? What is its use? I got a warning as shown below. What does this mean?
<module-includes>:1:1: warning: umbrella header for module 'XCTest' does not include header 'XCTextCase+AsynchronousTesting.h' [-Wincomplete-umbrella]
#import "/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/Library/Frameworks/XCTest.framework/Headers/XCTest.h"
推荐答案
是框架的主头文件。它的用途是你可以写
The umbrella header is the 'master' header file for a framework. Its use is that you can write
#import <UIKit/UIKit.h>
而不是
#import <UIKit/UIViewController.h>
#import <UIKit/UILabel.h>
#import <UIKit/UIButton.h>
#import <UIKit/UIDatePicker.h>
等等。
对我来说，< XCTest / XCTestCase + AsynchronousTesting.h> 包含在< XCTest / XCTest.h> 中。也许它不适合你？在这种情况下，添加
For me, <XCTest/XCTestCase+AsynchronousTesting.h> is included in <XCTest/XCTest.h>. Maybe it is not for you? In that case, add the
#import <XCTest/XCTestCase+AsynchronousTesting.h>
手动。
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