如何通过编程为一组UIButtons设置单独背景图像
如何通过编程为一组UIButtons设置单独背景图像
提问于 2012-06-16 14:27:43
下面是我以编程方式创建按钮的一段代码：
NSArray *buttonImage=[NSArray arrayWithObjects:[UIImage imageNamed:@"Cover_0.png"],
[UIImage imageNamed:@"Cover_1.png"],
[UIImage imageNamed:@"Cover_2.png"],
[UIImage imageNamed:@"Cover_3.png"],
[UIImage imageNamed:@"Cover_4.png"],
[UIImage imageNamed:@"Cover_5.png"],
[UIImage imageNamed:@"Cover_6.png"],
[UIImage imageNamed:@"Cover_7.png"],nil];
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
button.frame = CGRectMake(0, 0, 200.0f, 200.0f);
[button setTitle:[NSString stringWithFormat:@"%i", index] forState:UIControlStateNormal];
[button setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
button.titleLabel.font = [button.titleLabel.font fontWithSize:50];
[button setImage:buttonImage forState:UIControlStateNormal];
[button addTarget:self action:@selector(buttonTapped:) forControlEvents:UIControlEventTouchUpInside];
return button;但是在运行它的时候，我无法进入模拟器，它抛出了一个信号Sigabart错误。有人能帮上忙吗？
回答 5
Stack Overflow用户
回答已采纳
发布于 2012-06-16 19:48:40
要使用选择器数组以编程方式创建按钮，您可以使用以下代码片段：
//定义策略
@interface DataItemStrategy : NSObject
@property(nonatomic, assign) SEL someSelector;
@end
@implementation DataItemStrategy
@synthesize someSelector = _someSelector;
-(id)initWithSelector:(SEL)someSelector
{
self = [super init];
if (self)
{
self.someSelector = someSelector;
}
return self;
}
@end
-(void)createButtons
{
NSArray *buttonImages =[NSArray arrayWithObjects:[UIImage imageNamed:@"Cover_0.png"],
[UIImage imageNamed:@"Cover_1.png"],
[UIImage imageNamed:@"Cover_2.png"],nil];
NSArray *dataStrategies = [NSArray arrayWithObjects:
[[[DataItemStrategy alloc] initWithSelector:@selector(buttonAction0:)] autorelease],
[[[DataItemStrategy alloc] initWithSelector:@selector(buttonAction1:)] autorelease],
[[[DataItemStrategy alloc] initWithSelector:@selector(buttonAction2:)] autorelease], nil];
CGRect buttonFrame = CGRectMake(0, 0, 50, 50);
for (NSInteger i = 0; i < [buttonImages count]; i++)
{
buttonFrame.origin.y += 50;
UIImage *buttonImage = [buttonImages objectAtIndex:i];
DataItemStrategy *dataStrategie = [dataStrategies objectAtIndex:i];
NSString *title = [NSString stringWithFormat:@"%d", i];
UIButton *button = [self buttonWithFrame:buttonFrame image:buttonImage action:dataStrategie.someSelector title:title];
[self.view addSubview:button];
}
}
-(UIButton *)buttonWithFrame:(CGRect)buttonFrame image:(UIImage *)buttonImage action:(SEL)buttonAction title:(NSString *)title
{
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
button.frame = buttonFrame;
[button setTitle:title forState:UIControlStateNormal];
[button setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
button.titleLabel.font = [button.titleLabel.font fontWithSize:50];
[button setImage:buttonImage forState:UIControlStateNormal];
[button addTarget:self action:buttonAction forControlEvents:UIControlEventTouchUpInside];
return button;
}Stack Overflow用户
发布于 2012-06-16 14:35:29
不能将图像数组设置为UIButton图像属性。如果您查看UIButton的文档，您会发现它需要一个UIImage。
Stack Overflow用户
发布于 2012-06-16 14:55:12
你代码中的索引是什么？？设置以下内容：
[button setBackgroundImage:[buttonImage objectAtIndex:index] forState:UIControlStateNormal];页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/11061362
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