Ios 我不能使用我写的UIButton方法

我想写一个按钮的方法，这样我就可以设置一行代码的图像和标题，但它不能被使用

+(id)init {
    UIView *myLeftView=[[UIView alloc]initWithFrame:CGRectMake(0, 0,[UIScreen mainScreen].bounds.size.width/3,[UIScreen mainScreen].bounds.size.height)];
    myLeftView.backgroundColor=[UIColor colorWithRed:26/256.f green:31/256.f blue:36/256.f alpha:0.7];
    UIButton *accessButton=[[UIButton alloc]initWithFrame:CGRectMake(0, 20, myLeftView.bounds.size.width, 44)];
    [self setUpButton:accessButton withImage:@"Menu_Avatar" title:@"access"];
}

-(void)setUpButton:(UIButton *)button withImage:(NSString *)imageName title:(NSString *)title {
    [button setImage:[UIImage imageNamed:imageName] forState:UIControlStateNormal];
    [button setTitle:title forState:UIControlStateNormal];
    [self.myLeftView addSubview:button];
}

这是我在UIView类中编写的方法。

更改此方法：

-(instancetype)init{
    if (self == [super init]) {
       UIView *myLeftView=[[UIView alloc]initWithFrame:CGRectMake(0, 0,[UIScreen mainScreen].bounds.size.width/3,[UIScreen mainScreen].bounds.size.height)];
    myLeftView.backgroundColor=[UIColor colorWithRed:26/256.f green:31/256.f blue:36/256.f alpha:0.7];
    UIButton *accessButton=[[UIButton alloc]initWithFrame:CGRectMake(0, 20, myLeftView.bounds.size.width, 44)];
//    [accessButton setImage:[UIImage imageNamed:@"Menu_Avatar"] forState:UIControlStateNormal];
//    [accessButton setTitle:@"access" forState:UIControlStateNormal];
    [self setUpButton:accessButton withImage:@"Menu_Avatar" title:@"access"]; 
    }
return self ;
}

---

问题是，不能从类函数调用self

如果您查看init函数声明，它是带+，这意味着它是一个类函数

你可以做两件事：

将init函数保持为类函数，并将下面的函数更改为类函数2

+(id)init {
    UIView *myLeftView=[[UIView alloc]initWithFrame:CGRectMake(0, 0,[UIScreen mainScreen].bounds.size.width/3,[UIScreen mainScreen].bounds.size.height)];
    myLeftView.backgroundColor=[UIColor colorWithRed:26/256.f green:31/256.f blue:36/256.f alpha:0.7];
    UIButton *accessButton=[[UIButton alloc]initWithFrame:CGRectMake(0, 20, myLeftView.bounds.size.width, 44)];
    [NAMEOFTHECLASS setUpButton:accessButton withImage:@"Menu_Avatar" title:@"access"];
}

+(void)setUpButton:(UIButton *)button withImage:(NSString *)imageName title:(NSString *)title {
    [button setImage:[UIImage imageNamed:imageName] forState:UIControlStateNormal];
    [button setTitle:title forState:UIControlStateNormal];
    [self.myLeftView addSubview:button];
}

将类的名称更改为类的名称

另一件事是将init函数更改为instance函数。请执行以下操作：

-(id)init {
    UIView *myLeftView=[[UIView alloc]initWithFrame:CGRectMake(0, 0,[UIScreen mainScreen].bounds.size.width/3,[UIScreen mainScreen].bounds.size.height)];
    myLeftView.backgroundColor=[UIColor colorWithRed:26/256.f green:31/256.f blue:36/256.f alpha:0.7];
    UIButton *accessButton=[[UIButton alloc]initWithFrame:CGRectMake(0, 20, myLeftView.bounds.size.width, 44)];
    [self setUpButton:accessButton withImage:@"Menu_Avatar" title:@"access"];
}

您在+idinit中有一个类方法+并尝试在其中使用self作为实例方法-in-the-void。。。。此外，init不清楚它做什么，也不尊重各种init方法的命名法。