iOS中對於多個按鈕,選中其中一個,其他按鈕選中狀態為NO

 

 

第一,定義一個全局的按鈕變量

/**
 *  按鈕選中,中間值
 */
@property (nonatomic,strong) UIButton *selectedBtn;

 

第二,添加多個按鈕到scrollView中

/**
 *  創建按鈕添加到scrollView
 */
-(void)creatBtn
{
    int i = 0;
    NSArray *titleArray = @[@"頭條",@"熱點",@"體育",@"北京",@"訂閱",@"財經",@"科技",@"汽車",@"時尚",@"圖片",@"跟帖",@"房產",@"直播",@"輕松一刻",@"軍事",@"歷史"];
    for (NSString *title in titleArray) {
        UIButton *btn = [[UIButton alloc] init];
        btn.frame = CGRectMake(i*pading + _tempW, 0, 50, 50);
        [btn setTitle:title forState:UIControlStateNormal];
        btn.tag = i;
        btn.contentMode = UIViewContentModeCenter;
        [btn setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
        [btn setTitleColor:[UIColor whiteColor] forState:UIControlStateHighlighted];
        [btn setTitleColor:[UIColor whiteColor] forState:UIControlStateSelected];
        [btn addTarget:self action:@selector(titleBtnClick:) forControlEvents:UIControlEventTouchUpInside];
        [btn sizeToFit];
        _tempW += btn.frame.size.width;
        [self.btnView addSubview:btn];
        i++;
    }

}

第三,監聽按鈕的點擊,切換選中按鈕

 

 

-(void)titleBtnClick:(UIButton *)btn
{
    if (btn!= self.selectedBtn) {
        self.selectedBtn.selected = NO;
        btn.selected = YES;
        self.selectedBtn = btn;
    }else{
        self.selectedBtn.selected = YES;
    }
//    if (self.selectedBtn == nil) {
//        btn.selected = YES;
//        self.selectedBtn = btn;
//    }else if (self.selectedBtn != nil&&self.selectedBtn == btn){
//        btn.selected = YES;
//    }else if (self.selectedBtn != btn&&self.selectedBtn != nil){
//        self.selectedBtn.selected = NO;
//        btn.selected = YES;
//        self.selectedBtn = btn;
//    }
}