ios 常用功能(三)

批量创建按钮

- (void)viewDidLoad
{
    [super viewDidLoad];
    
    NSInteger total = 9;  //数量
    NSInteger btnWidth = 80;//按钮宽
    NSInteger btnHeight = 30;//按钮高
    NSInteger heightSpace = 15;//按钮行间距
    NSInteger widthSpace = 15;//按钮列间距
    NSInteger btnX = 30;//按钮X起点坐标
    NSInteger btnY = 189;//按钮Y起点坐标
    
    for (int i=0;i<total;i++) {
        UIButton *btns = [UIButton buttonWithType:UIButtonTypeRoundedRect];
        [btns setBackgroundColor:[UIColor whiteColor]];
        [btns setTag:i+1];//设置按钮Tag
        [btns addTarget:self action:@selector(btnsAction:) forControlEvents:UIControlEventTouchUpInside];
        
        CGRect frame;
        frame.origin.x = (i%3)*(btnWidth+widthSpace)+btnX;
        frame.origin.y = (i/3)*(btnHeight+heightSpace)+btnY;
       //frame.origin.x = btnX;
       // frame.origin.y = i*(btnHeight+heightSpace)+btnY;

        frame.size.width = btnWidth;
        frame.size.height = btnHeight;
        [btns setFrame:frame];
        [self.view addSubview:btns];
    }
}

　

ios选择框

-(void)checkboxClick:(UIButton *)btn
{
    btn.selected = !btn.selected;
}


- (void)viewDidLoad {
UIButton *checkbox = [UIButton buttonWithType:UIButtonTypeCustom];
    
    CGRect checkboxRect = CGRectMake(135,150,36,36);
    [checkbox setFrame:checkboxRect];
    
    [checkbox setImage:[UIImage imageNamed:@"checkbox_off.png"] forState:UIControlStateNormal];
    [checkbox setImage:[UIImage imageNamed:@"checkbox_on.png"] forState:UIControlStateSelected];
    
    [checkbox addTarget:self action:@selector(checkboxClick:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:checkbox];    
}