转载:http://blog.youkuaiyun.com/duoduo_333/article/details/47024551
标签的大小根据上面的文字来自适应大小,需要根据后台返回的数据自动换行.没有添加
- NSArray *arr = @[@"无知",@"风云变幻",@"施耐庵",@"唉",@"西门吹雪",@"呵呵哒",@"快看看",@"窿窿啦啦",@"一杆禽兽狙",@"合欢花",@"暴走大事件",@"非诚勿扰",@"呵呵呵"];
- CGFloat w = 0;//保存前一个button的宽以及前一个button距离屏幕边缘的距离
- CGFloat h = 200;//用来控制button距离父视图的高
- for (int i = 0; i < arr.count; i++) {
- UIButton *button = [UIButton buttonWithType:UIButtonTypeSystem];
- button.tag = 100 + i;
- button.backgroundColor = [UIColor greenColor];
- [button addTarget:self action:@selector(handleClick:) forControlEvents:UIControlEventTouchUpInside];
- [button setTitleColor:[UIColor redColor] forState:UIControlStateNormal];
- //根据计算文字的大小
- NSDictionary *attributes = @{NSFontAttributeName:[UIFont systemFontOfSize:12]};
- CGFloat length = [arr[i] boundingRectWithSize:CGSizeMake(320, 2000) options:NSStringDrawingUsesLineFragmentOrigin attributes:attributes context:nil].size.width;
- //为button赋值
- [button setTitle:arr[i] forState:UIControlStateNormal];
- //设置button的frame
- button.frame = CGRectMake(10 + w, h, length + 15 , 30);
- //当button的位置超出屏幕边缘时换行 320 只是button所在父视图的宽度
- if(10 + w + length + 15 > 320){
- w = 0; //换行时将w置为0
- h = h + button.frame.size.height + 10;//距离父视图也变化
- button.frame = CGRectMake(10 + w, h, length + 15, 30);//重设button的frame
- }
- w = button.frame.size.width + button.frame.origin.x;
- [self.view addSubview:button];
- }
- 点击事件
- - (void)handleClick:(UIButton *)btn{
- NSLog(@"%ld",btn.tag);
- }