Ios 当我将按钮操作从后台加载到Mainclass时引发异常

我正在尝试将

UIView

从后台类加载到我的主类（这里我在

UIView

上添加了一个按钮）。正在加载

ui视图

，并且在该

ui视图

上添加了一个按钮，但当我点击它时，按钮操作正在抛出异常。我的代码如下：

背景类： 主要类别：

---

我正在从我的主类加载

UIView

，但是按钮操作引发了一个异常。我在这里做错了什么？

您正在从另一个类调用一个方法，因此一旦您的视图完成加载，它就无法访问您添加为按钮目标的self

change your method like this
-(void)loadView1 :(UIView *)myview :(ViewController*)VC
{
    UIView * firstview =[[UIView alloc]initWithFrame:CGRectMake(0, 50, 320, 430)];
    [firstview setBackgroundColor:[UIColor yellowColor]];
    UIButton *addProject=[[UIButton alloc]init];
    addProject = [UIButton buttonWithType: UIButtonTypeRoundedRect];
    addProject.frame = CGRectMake(100, 285, 100, 18);
    addProject.backgroundColor = [UIColor redColor];
    [addProject setTitle:@"Show View" forState:UIControlStateNormal];

    [addProject addTarget:VC action:@selector(ProjectPressed:) forControlEvents:UIControlEventTouchUpInside];
    [firstview addSubview:addProject];

    [myview addSubview:firstview];
}


and in main class
 call like this
[m1 loadView1:self.view :self];

also add you selector method to main class(ViewController.h)
- (void)ProjectPressed:(UIButton*)sender
{
    NSLog(@"ok");

}

---

您正在从另一个类调用一个方法，因此一旦您的视图完成加载，它就无法访问您添加为按钮目标的self

change your method like this
-(void)loadView1 :(UIView *)myview :(ViewController*)VC
{
    UIView * firstview =[[UIView alloc]initWithFrame:CGRectMake(0, 50, 320, 430)];
    [firstview setBackgroundColor:[UIColor yellowColor]];
    UIButton *addProject=[[UIButton alloc]init];
    addProject = [UIButton buttonWithType: UIButtonTypeRoundedRect];
    addProject.frame = CGRectMake(100, 285, 100, 18);
    addProject.backgroundColor = [UIColor redColor];
    [addProject setTitle:@"Show View" forState:UIControlStateNormal];

    [addProject addTarget:VC action:@selector(ProjectPressed:) forControlEvents:UIControlEventTouchUpInside];
    [firstview addSubview:addProject];

    [myview addSubview:firstview];
}


and in main class
 call like this
[m1 loadView1:self.view :self];

also add you selector method to main class(ViewController.h)
- (void)ProjectPressed:(UIButton*)sender
{
    NSLog(@"ok");

}

---

谢谢，但在myview1类中，如果我们没有声明projectPrssed方法，它会显示类似未解析选择器（ProjectPressed）的警告，那么是否有任何解决方案来删除该警告Hi，请将其添加到您的ViewController.h文件-（void）ProjectPressed:（UIButton*）发送方；谢谢，但在myview1类中，如果我们没有声明projectPrssed方法，它会显示类似未解析选择器（ProjectPressed）的警告，那么是否有任何解决方案来删除该警告Hi，请将其添加到您的ViewController.h文件-（void）ProjectPressed:（UIButton*）发送方；什么是例外？什么是例外？

change your method like this
-(void)loadView1 :(UIView *)myview :(ViewController*)VC
{
    UIView * firstview =[[UIView alloc]initWithFrame:CGRectMake(0, 50, 320, 430)];
    [firstview setBackgroundColor:[UIColor yellowColor]];
    UIButton *addProject=[[UIButton alloc]init];
    addProject = [UIButton buttonWithType: UIButtonTypeRoundedRect];
    addProject.frame = CGRectMake(100, 285, 100, 18);
    addProject.backgroundColor = [UIColor redColor];
    [addProject setTitle:@"Show View" forState:UIControlStateNormal];

    [addProject addTarget:VC action:@selector(ProjectPressed:) forControlEvents:UIControlEventTouchUpInside];
    [firstview addSubview:addProject];

    [myview addSubview:firstview];
}


and in main class
 call like this
[m1 loadView1:self.view :self];

also add you selector method to main class(ViewController.h)
- (void)ProjectPressed:(UIButton*)sender
{
    NSLog(@"ok");

}