我如何创建一个基本的UIButton编程?例如,在我的视图控制器中,当执行viewDidLoad方法时,将动态创建三个uibutton,并设置其布局或属性。
当前回答
Swift 3版本应该是:
let myButton:UIButton = {
let myButton = UIButton() // If you want to set the type use like
// UIButton(type: .RoundedRect) or
// UIButton(type: .Custom)
myButton.setTitle("Hai Touch Me", for: .normal)
myButton.setTitleColor(UIColor.blue, for: .normal)
myButton.frame = CGRect(x: 20, y: 20, width: 100, height: 40)
myButton.addTarget(self, action: #selector(ViewController.pressedAction(_:)), for: .touchUpInside)
self.view.addSubview(myButton)
return myButton
}()
其他回答
试试这个:
首先把它写在你的。h文件的viewcontroller
UIButton *btn;
现在把这个写在viewcontrollers viewDidLoad的。m文件中。
btn=[[UIButton alloc]initWithFrame:CGRectMake(50, 20, 30, 30)];
[btn setBackgroundColor:[UIColor orangeColor]];
[btn setTitle: @"My Button" forState:UIControlStateNormal];
[btn setTitleColor: [UIColor blueVolor] forState:UIControlStateNormal];
[btn.layer setBorderWidth:1.0f];
[btn.layer setBorderColor:[UIColor BlueVolor].CGColor];
//adding action programatically
[btn addTarget:self action:@selector(btnClicked:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:btn];
在视图控制器的。m文件中写入viewDidLoad方法的外部
- (IBAction)btnClicked:(id)sender
{
//Write a code you want to execute on buttons click event
}
'action:@selector(aMethod:)'这样写方法:
- (void)aMethod:(UIButton*)button
{
NSLog(@"Button clicked.");
}
这对我很管用。谢谢。KS。
UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[button addTarget:self
action:@selector(aMethod:)
forControlEvents:UIControlEventTouchDown];
[button setTitle:@"Show View" forState:UIControlStateNormal];
button.frame = CGRectMake(80.0, 210.0, 160.0, 40.0);
[view addSubview:button];
试一试……
UIButton *finalPriceBtn=[UIButton buttonWithType:UIButtonTypeRoundedRect];
finalPriceBtn.frame=CGRectMake(260, 25, 45, 15);
[finalPriceBtn addTarget:self action:@selector(goBtnClk:) forControlEvents:UIControlEventTouchUpInside];
finalPriceBtn.titleLabel.font=[UIFont systemFontOfSize:12];
[finalPriceBtn setTitle:[NSString stringWithFormat:@"$%.2f",tempVal] forState:UIControlStateNormal];
finalPriceBtn.titleLabel.textColor = [UIColor colorWithRed: 2.0f/255.0f green: 155.0f/255.0f blue: 213.0f/255.0f alpha:1];
finalPriceBtn.titleLabel.textAlignment=UITextAlignmentLeft;
[imageView addSubview:finalPriceBtn];
希望我能帮上忙。
-(void)addStuffToView
{
UIButton *aButton = [[UIButton alloc] initWithFrame:CGRectMake(20, 20, 20, 20)]; //(x, y, width, height of button on screen
[aButton setTitle:@"Button" forState:UIControlStateNormal];//puts the text on the button
aButton.titleLabel.font = somefont;//sets the font if one is already stated
aButton.titleLabel.font = [UIFont fontWithName:@"Arial-MT" size:12];//sets the font type and size
[aButton addTarget:self action:@selector(back) forControlEvents:UIControlEventTouchUpInside];//see back method below
[aButton setBackgroundImage:[UIImage imageNamed:@"someImage.png"] forState:UIControlStateNormal];//sets the image of the button
[self.view addSubview:back];
}
-(void)back
{
UIAlertView *alert = [[UIAlertView alloc]initWithTitle.....]
}
-(void)viewDidLoad
{
[super viewDidLoad];
[self addStuffToView];//adds all items built in this method to the view
}
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