iOS实现按钮点击选中与被选中切换功能

 @property (nonatomic, strong) UIButton *selecBtn;

//初始化按钮UIButton * button = [UIButton buttonWithType:UIButtonTypeCustom];//给按钮设置图片[button setBackgroundImage:[UIImage imageNamed:imageArray[i]] forState:UIControlStateNormal];[button setBackgroundImage:[UIImage imageNamed:SeleimageArray[i]] forState:UIControlStateDisabled];      //添加方法[button addTarget:self action:@selector(changeDataButton:) forControlEvents:UIControlEventTouchDown];

 - (IBAction)btnClick:(UIButton *)btn {  self.selecBtn.enabled = YES;  btn.enabled = NO;  self.selecBtn = btn;  }