ios - 为动态创建的 UIButtons 选择/取消选择

Question

我将解释场景:我在 for 循环中动态创建三个 UIButton。条件是默认情况下第一个按钮应该有边框。现在如果我们选择其他按钮，前一个按钮的边框应该消失，现在应该为所选按钮显示边框。

for (int btnsCount = 0 ; btnsCount <[DataList count]; btnsCount++) {
  self.graphSubDataButton = [[UIButton alloc] init];


    self.graphSubDataButton.frame = CGRectMake(buttonsOffset, 0, 120, 40);
    [self.graphSubDataButton setTitleColor:UIColorFromRGB(0x548DCD) forState:UIControlStateNormal];

    [self.graphSubDataButton.titleLabel setFont:[UIFont fontWithName:AVENIR_NEXT_MEDIUM size:13.0f]];

    self.graphSubDataButton.tag = btnsCount+1;
    [self.graphSubDataButton addTarget:self action:@selector(enableRespectiveButton2:) forControlEvents:UIControlEventTouchUpInside];
    buttonsOffset = buttonsOffset+30 + self.graphSubDataButton.frame.size.width ;

if (self.graphSubDataButton.tag==1)
    {

        [self.graphSubDataButton.layer setBorderWidth:1.2f];
        [self.graphSubDataButton.layer setBorderColor:[UIColorFromRGB(0x3070BA) CGColor]];
        [self.graphSubDataButton.layer setCornerRadius:8.0f];
    }
}   


-(void) enableRespectiveButton2:(UIButton *) sender
{
}   

Answer 1

我对你的代码结构做了一些改动以使其正常工作，如果你有不明白的地方可以评论。

NSInteger defaultSelectedTag = 1;
for (int btnsCount = 0 ; btnsCount <[DataList count]; btnsCount++) {
   UIButton *graphSubDataButton = [UIButton buttonWithType:UIButtonTypeCustom];
   graphSubDataButton.frame = CGRectMake(buttonsOffset, 0, 120, 40);
   [graphSubDataButton setTitleColor:UIColorFromRGB(0x548DCD) forState:UIControlStateNormal];
   [graphSubDataButton.titleLabel setFont:[UIFont fontWithName:AVENIR_NEXT_MEDIUM size:13.0f]];
   graphSubDataButton.tag = btnsCount+1;
   [graphSubDataButton addTarget:self action:@selector(enableRespectiveButton:) forControlEvents:UIControlEventTouchUpInside];
   buttonsOffset = buttonsOffset+30 + self.graphSubDataButton.frame.size.width ;
   //add your button somewhere
   //e.g.
   //[self.view addSubview:graphSubDataButton];
   if (graphSubDataButton.tag == defaultSelectedTag) {
       [self setBorderForButton:graphSubDataButton];
   }
}

- (void) setBorderForButton:(UIButton *)sender {
    [sender.layer setBorderWidth:1.2f];
    [sender.layer setBorderColor:[UIColorFromRGB(0x3070BA) CGColor]];
    [sender.layer setCornerRadius:8.0f];
}

- (void) enableRespectiveButton2:(UIButton *) sender {
    for(UIButton *buttons in [sender.superview subviews]) {
        if([buttons isKindOfClass:[UIButton class]]) {
            if(![buttons isEqual:sender]) {
                //add logic to, remove borders
                //buttons.layer.borderWidth = 0.0f;
            }
        }
    }
    [self setBorderForButton:sender];
}