ios通过代码创建按钮

方法一:

-(void) viewDidLoad{
    [super viewDidLoad];
    UIButton *addbtn = [[UIButton alloc] init];
    [addbtn setBackgroundImage:[UIImage imageNamed:@"btn_1"] forState:UIControlStateNormal];
    [addbtn setBackgroundImage:[UIImage imageNamed:@"btn_2"] forState:UIControlStateHighlighted];
    addbtn.frame = CGRectMake(90, 50, 20, 50);//(x,y,w,h)
    [self.view addSubview:addbtn];
    //监听btcn
    [addbtn addTarget:self action:@selector(testAdd) forControlEvents:UIControlEventTouchUpInside];

}

//点击事件调用的方法
-(void)testAdd{
    NSLog(@">>>>>>Add Ok!");
}

方法二：

#pragma mark 相同方法共用(创建多个按钮时)
-(void) AddBtn:(NSString *)Normal Highlighted:(NSString *) Highlighted frame:(CGRect)frame
         action:(SEL)action{
    UIButton *btn = [[UIButton alloc] init];c
    [btn setBackgroundImage:[UIImage imageNamed:Normal] forState:UIControlStateNormal];
    [btn setBackgroundImage:[UIImage imageNamed:Highlighted] forState:UIControlStateHighlighted];
    btn.frame = frame;
    //监听btn
    [btn addTarget:self action:action forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:btn];

}

-(void) viewDidLoad{
    [super viewDidLoad];
    [self AddBtn:@"btn_1" Highlighted:@"btn_2" frame: CGRectMake(90, 50, 50, 50) action:@selector(testAdd)];
    
    [self AddBtn:@"btn_2" Highlighted:@"btn_1" frame: CGRectMake(180, 50, 50, 50) action:@selector(testTwo)];
}

//点击事件调用的方法
-(void)testAdd{
    NSLog(@">>>>>>Add Ok!");
    [self Show];
}

-(void)testTwo{
    NSLog(@">>>>>>Two");
    [self Show];
}

-(void)Show{
    NSLog(@">>>>Age!");
}