[英]How do I change both the image and text of an iOS button?
我有一个圆角矩形按钮,可以正确换出图像。 我也想更改其中的文本,但该文本不会显示。 关于StackOverflow的大多数问题似乎只处理一个问题,而不是另一个问题,而看起来最相关的问题最终是针对某种BarItem。
在IBAction中,用于按钮的触摸,我有以下内容。
[sender setImage:[UIImage imageNamed:@"swappingCorrectly.png"] forState:UIControlStateNormal];
[sender setTitle:(@"Aww, this doesn't show up!") forState:UIControlStateNormal];
如前所述,图像切换得很好-但没有显示该标签。 我在另一个不交换图像的按钮中使用了相同的文本交换行,并且工作正常。
只是在第一次点击后没有显示。 有人知道我该怎么做才能使该文本显示出来吗?
这对我有用。
- (IBAction)buttonPressed:(id)sender {
[sender setImage:[UIImage imageNamed:@"button.jpeg"] forState:UIControlStateNormal];
[sender setTitle:(@"Aww") forState:UIControlStateNormal];
}
我确实注意到标签在最右边,而不是死点。 标签是否有可能在错误的位置渲染? 注释掉setTitle会产生相同的结果,按钮标题会被图像偏移。
如何将UIImageView变成按钮。 注意:这很脏,应该包装在一个类中。 我留了进去,但是注释掉了代码,只需要轻按一下即可。 没有显示的是在xib文件上引发并设置为userenabled = true的UIImageView。
#import "ViewController.h"
@interface ViewController ()
@end
@implementation ViewController
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
UITapGestureRecognizer* tap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(buttonPressed:)];
[[self fakeButton] addGestureRecognizer:tap];
UILabel* label = [[UILabel alloc] initWithFrame:CGRectMake(10, 10, 250, 25)];
label.text = @"unpressed";
label.backgroundColor = [UIColor clearColor];
[[self fakeButton] addSubview:label];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (void)buttonPressed:(id)sender {
// UIGestureRecognizer *gesture = (UIGestureRecognizer*)sender;
// UIImageView* temp = (UIImageView*)gesture.view;
// for (UILabel *label in temp.subviews) {
// label.text = @"pressed";
// }
// temp.image = [UIImage imageNamed:@"button.jpeg"];
//
// //if you want it to reset after a Delay
// [self performSelector:@selector(buttonUnpressed:) withObject:temp afterDelay:.2];
}
-(void)buttonUnpressed:(UIImageView*)view
{
// for (UILabel *label in view.subviews) {
// label.text = @"unpressed";
// }
// view.image = [UIImage imageNamed:@"origButton.jpeg"];
// [self performSelector:@selector(buttonUnpressed:) withObject:view afterDelay:.2];
}
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
UITouch *touch = [touches anyObject];
CGPoint point = [touch locationInView:self.view];
if (CGRectContainsPoint([[self fakeButton] frame], point))
{
//Do touch down state
NSLog(@"touchStarted");
[[self fakeButton] setImage:[UIImage imageNamed:@"button.jpeg"]];
for (UILabel *label in [[self fakeButton] subviews]) {
label.text = @"pressed";
}
}
}
-(void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event
{
NSLog(@"touch ended");
//remove touch down state
[[self fakeButton] setImage:[UIImage imageNamed:@"origButton.jpeg"]];
for (UILabel *label in [[self fakeButton] subviews]) {
label.text = @"unpressed";
}
}
@end
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