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
-(UIButton *)addButton:(NSString *)title :(CGRect)frame : (SEL)selector :(UIImage *)image :(int)tag{
UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
btn.frame = frame;
[btn addTarget:self action:selector forControlEvents:UIControlEventTouchUpInside];
[btn setTitle:title forState:UIControlStateNormal];
[btn setImage:image forState:UIControlStateNormal];
btn.backgroundColor = [UIColor clearColor];
btn.tag = tag;
return btn;
}
你可以把它添加到视图中:
[self.view addSubview:[self addButton:nil :self.view.frame :@selector(btnAction:) :[UIImage imageNamed:@"img.png"] :1]];
其他回答
你可以在你的ViewDidLoad方法中实现它:
continuebtn = [[UIButton alloc]initWithFrame:CGRectMake(10, 100, view1.frame.size.width-20, 40)];
[continuebtn setBackgroundColor:[UIColor grayColor]];
[continuebtn setTitle:@"Continue" forState:UIControlStateNormal];
continuebtn.layer.cornerRadius = 10;
continuebtn.layer.borderWidth =1.0;
continuebtn.layer.borderColor = [UIColor blackColor].CGColor;
[continuebtn setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
[continuebtn addTarget:self action:@selector(continuetonext) forControlEvents:UIControlEventTouchUpInside];
[view1 addSubview:continuebtn];
其中continuetonext为:
-(void)continuetonext
{
GeneratePasswordVC *u = [[GeneratePasswordVC alloc]init];
[self.navigationController pushViewController:u animated:YES];
}
UIButton *btnname = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[btnname setTitle:@"Click Me" forState:UIControlStateNormal];
btnname.frame = CGRectMake(10, 10, 100, 140);
[self.view addSubview:btnname];
- (void)viewDidLoad {
[super viewDidLoad];
[self addMyButton]; // Call add button method on view load
}
- (void)addMyButton{ // Method for creating button, with background image and other properties
UIButton *playButton = [[UIButton buttonWithType:UIButtonTypeRoundedRect] retain];
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];
}
对于Swift 2.0:
let btnObject : UIButton = UIButton()
btnObject.frame = CGRect(x: 8, y: 89, width: 70, height: 22)
btnObject.titleLabel?.font = UIFont(name: "Helvetica Neue", size: 13)
btnObject.titleLabel?.textColor = UIColor.whiteColor()
btnObject.backgroundColor = UIColor(red: 189/255, green: 176/255, blue: 0/255, alpha: 1)
btnObject.titleLabel?.textAlignment = NSTextAlignment.Center
btnObject.addTarget(self, action: "btnbtnObjectClick:", forControlEvents: UIControlEvents.TouchUpInside)
subView.addSubview(btnObject)
拜托,都2014年了!为什么代码块评估分配还没有被使用,因为趋势表明这是未来的趋势!
UIButton* button = ({
//initialize button with frame
UIButton* button = [[UIButton alloc] initWithFrame:({
CGRect frame = CGRectMake(10.0, 10.0, 200.0, 75.0);
frame;
})];
//set button background color
[button setBackgroundColor:({
UIColor* color = [UIColor colorWithRed:1.0 green:1.0 blue:0.0 alpha:1.0];
color;
})];
//set button title for state
[button setTitle:({
NSString* string = [NSString stringWithFormat:@"title words"];
string;
}) forState:({
UIControlState state = UIControlStateNormal;
state;
})];
//set selector
[button addTarget:self action:({
SEL select = @selector(method:);
select;
}) forControlEvents:({
UIControlEvents event = UIControlEventTouchUpInside;
event;
})];
//return button
button;
});
[self.view addSubview:button];
哇!
或者确切的结果可以这样完成:
UIButton* button = [[UIButton alloc] initWithFrame:CGRectMake(10.0, 10.0, 200.0, 75.0)];
[button setBackgroundColor:[UIColor colorWithRed:1.0 green:1.0 blue:0.0 alpha:1.0]];
[button setTitle:@"title words" forState:UIControlStateNormal];
[button addTarget:self action:@selector(method:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:button];
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