以编程方式在 xCode 4.5 中模拟 UITouch (UISpec)

问题描述

我正在使用 UISpec 在我的项目中进行自动化测试.一切都很好，直到 Apple 发布带有 iOS 6 SDK 的 xCode 4.5.现在无法编译 UISpec 项目，因为 UITouch 类类别中的错误列表.代码如下:

I'm using UISpec for automated testing in my project. Everything was fine until Apple released xCode 4.5 with iOS 6 SDK. Now UISpec project can't be compiled because a list of errors in category of UITouch class. Here is the code:

//
//  TouchSynthesis.m
//  SelfTesting
//
//  Created by Matt Gallagher on 23/11/08.
//  Copyright 2008 Matt Gallagher. All rights reserved.
//
//  Permission is given to use this source code file, free of charge, in any
//  project, commercial or otherwise, entirely at your risk, with the condition
//  that any redistribution (in part or whole) of source code must retain
//  this copyright and permission notice. Attribution in compiled projects is
//  appreciated but not required.
//

@implementation UITouch (Synthesize)

//
// initInView:phase:
//
// Creats a UITouch, centered on the specified view, in the view's window.
// Sets the phase as specified.
//
- (id)initInView:(UIView *)view
{
    self = [super init];
    if (self != nil)
    {
        CGRect frameInWindow;
        if ([view isKindOfClass:[UIWindow class]])
        {
            frameInWindow = view.frame;
        }
        else
        {
            frameInWindow =
            [view.window convertRect:view.frame fromView:view.superview];
        }

        _tapCount = 1;
        _locationInWindow =
        CGPointMake(
                    frameInWindow.origin.x + 0.5 * frameInWindow.size.width,
                    frameInWindow.origin.y + 0.5 * frameInWindow.size.height);
        _previousLocationInWindow = _locationInWindow;

        UIView *target = [view.window hitTest:_locationInWindow withEvent:nil];

        _window = [view.window retain];
        _view = [target retain];
        _phase = UITouchPhaseBegan;
        _touchFlags._firstTouchForView = 1;
        _touchFlags._isTap = 1;
        _timestamp = [NSDate timeIntervalSinceReferenceDate];
    }
    return self;
}

//
// setPhase:
//
// Setter to allow access to the _phase member.
//
- (void)setPhase:(UITouchPhase)phase
{
    _phase = phase;
    _timestamp = [NSDate timeIntervalSinceReferenceDate];
}

//
// setPhase:
//
// Setter to allow access to the _locationInWindow member.
//
- (void)setLocationInWindow:(CGPoint)location
{
    _previousLocationInWindow = _locationInWindow;
    _locationInWindow = location;
    _timestamp = [NSDate timeIntervalSinceReferenceDate];
}

@end

编译器在诸如_tapCount = 1;"之类的行上给出错误错误是未知类型名称_tapCount"；你的意思是...?

compiler gives errors on lines like "_tapCount = 1;" error is "Uknown type name "_tapCount"; did you mean ...?"

我做了什么:

1. 获取 UITouch 类的实例变量列表，使用运行时函数class_copyIvarList"并检查这些变量是否仍然存在.

2. 尝试在运行时更改所需的值，例如

1. get a list of instance variable for UITouch class, using run time function "class_copyIvarList" and checked if these variables still exist. they do.

2. tried to change needed values at runtime, like

uint uPhase = UITouchPhaseBegin;object_setInstanceVariable(self, "_phase", &uPhase);

uint uPhase = UITouchPhaseBegin;object_setInstanceVariable(self, "_phase", &uPhase);

或

Ivar var = class_getInstanceVariable([self class], "_phase");
object_setIvar(self, var, [NSNumber numberWithInt:UITouchPhaseBegin]);

在这两种情况下，都将无效值写入_phase"成员.我通过将 UITouch 实例的描述打印到控制台来检查这一点.它被写成阶段:未知".

in both cases invalid value was written to "_phase" member. i checked that by printing description of the UITouch instance to console. it was written "phase: Uknown".

然后我决定尝试键值编码并实现它:

then i decided to try key-value coding and implemented it like:

[self setValue:[NSNumber numberWithInt:1] forKey:@"tapCount"];
[self setValue:[NSNumber numberWithInt:UITouchPhaseBegin] forKey:@"phase"];

现在它给出了一些结果.编译错误被消除，UITouch 实例的成员值被更改，但仍然没有任何反应.我在适当的 UI 对象(在我的例子中是 UIButton)的touchesBegan:..."和touchesEnded:..."方法中设置断点并调试它.这些方法被调用，但没有任何反应 - 按钮处理程序没有被调用.

now it gave some results. compile errors are eliminated, member values of UITouch instance are changed but still nothing happens. i set breakpoints in "touchesBegan:..." and "touchesEnded:..." methods of appropriate UI object (it was UIButton in my case) and debugged it. these methods are called, but nothing happens - button handler is not called.

同样由于 KVC，我不得不注释 UITouch 类别的方法setPhase"和setLocationInWindow"，否则会发生无限递归.属性的 setter 调用自身.

also due to KVC i had to comment methods "setPhase" and "setLocationInWindow" of UITouch category, otherwise endless recursion happens. setter of the property calls itself.

现在我没有想法了.这个类别是由 Matt Gallagher 于 23/11/08 创建."，这意味着它是 UISpec 的第三方代码.所以我希望它在除 UISpec 之外的其他地方使用，并且有人知道解决方法.

now i'm out of ideas. this category is "Created by Matt Gallagher on 23/11/08.", that means it is a third party code for UISpec. so i hope it is used somewhere else except the UISpec and somebody knows a work around.

谢谢.

附言我知道这是一个私有 API.它不包含在项目的发布配置中.我只需要它用于自动化测试

P.S. i know that this is a private API. it is not included to the release configuration of the project. i need it only for automated testing

推荐答案

您无需更改 UIQuery.m 文件中的任何内容.请将以下代码行添加到 UIQuery.h 文件中:

You do not have to change anything in UIQuery.m file. Please add following lines of code to UIQuery.h file :

#ifdef __IPHONE_6_0
@interface UITouch () {
    NSTimeInterval _timestamp;
    UITouchPhase _phase;
    UITouchPhase _savedPhase;
    NSUInteger _tapCount;

    UIWindow *_window;
    UIView *_view;
    UIView *_gestureView;
    UIView *_warpedIntoView;
    NSMutableArray *_gestureRecognizers;
    NSMutableArray *_forwardingRecord;

    CGPoint _locationInWindow;
    CGPoint _previousLocationInWindow;
    UInt8 _pathIndex;
    UInt8 _pathIdentity;
    float _pathMajorRadius;
    struct {
        unsigned int _firstTouchForView:1;
        unsigned int _isTap:1;
        unsigned int _isDelayed:1;
        unsigned int _sentTouchesEnded:1;
        unsigned int _abandonForwardingRecord:1;
    } _touchFlags;
}
@end
#endif

谢谢.

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