Question

如何在不使用“界面”构建器的情况下创建简单按钮？

Answer 1

你需要声明一个像这样的UIButton：

UIButton *newButton = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 80, 40)];
[newButton setTitle:@"Some Button" forState:UIControlStateNormal];

然后，您可以将按钮添加到视图中 -

[self.view addSubview: newButton]; // (could be another view other then self.view)

最后，如果你想在按下该按钮时发生一些动作，你可以添加：

[newButton  addTarget:self action:@selector(doSomething)
     forControlEvents:UIControlEventTouchUpInside];

当然要宣布该功能：

- (void) doSomething
{
       NSLog(@"Button pressed");
}

当然不要忘记释放按钮。

Answer 2

像这样 -

自定义按钮 -

UIButton *button = [[UIButton alloc] initWithFrame:CGRectMake(0.0f, 0.0f, 100.0f, 30.0f)];

system buttom -

UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];

Answer 3

尝试使用以下

UIButton *playButton = [[UIButton buttonWithType:UIButtonTypeRoundedRect];
playButton.frame = CGRectMake(110.0, 360.0, 100.0, 30.0);
[playButton setTitle:@"Play" forState:UIControlStateNormal];
playButton.backgroundColor = [UIColor clearColor];
[playButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal ];
UIImage *buttonImageNormal = [UIImage imageNamed:@"blueButton.png"];
UIImage *strechableButtonImageNormal = [buttonImageNormal stretchableImageWithLeftCapWidth:12 topCapHeight:0];
[playButton setBackgroundImage:strechableButtonImageNormal forState:UIControlStateNormal];
UIImage *buttonImagePressed = [UIImage imageNamed:@"whiteButton.png"];
UIImage *strechableButtonImagePressed = [buttonImagePressed stretchableImageWithLeftCapWidth:12 topCapHeight:0];
[playButton setBackgroundImage:strechableButtonImagePressed forState:UIControlStateHighlighted];
[playButton addTarget:self action:@selector(playAction:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:playButton];

如何在不使用“界面”构建器的情况下创建简单按钮？

3 个答案: