【发布时间】:2012-06-12 02:41:59
【问题描述】:
我正在尝试使用一个按钮来切换按钮的颜色。由于某种原因,下面的代码不起作用...
**//Header (.h)**
@property UIColor *imageColor1;
@property UIColor *imageColor2;
@property UIButton *button1;
@property UIButton *button2;
@property CGRect viewBounds;
-(IBAction)changeColor:(id)sender;
-(IBAction)createButton;
**//Implementation (.m)**
@synthesize imageColor1;
@synthesize imageColor2;
@synthesize button1;
@synthesize button2;
@synthesize viewBounds;
-(IBAction)createButton{
self.viewBounds = self.view.bounds;
self.button1 = [UIButton buttonWithType:UIButtonTypeCustom];
self.button1.frame = CGRectMake(CGRectGetMidX(self.viewBounds)-30, CGRectGetMidY(viewBounds)-15, 60, 30);
self.button1.backgroundColor = self.imageColor1;
[self.view addSubview:button1];
self.button2 = [UIButton buttonWithType:UIButtonTypeCustom];
self.button2.frame = CGRectMake(CGRectGetMidX(self.viewBounds)-15, CGRectGetMidY(viewBounds)-30, 30, 60);
self.button2.backgroundColor = self.imageColor2;
[self.view addSubview:button2];
}
-(IBAction)changeColor:(id)sender{
int changeCount = 0;
int changeCount1 = 1;
NSArray *colors = [[NSArray alloc] initWithObjects:[UIColor redColor],[UIColor blueColor],[UIColor yellowColor],[UIColor magentaColor],[UIColor greenColor],[UIColor orangeColor],[UIColor purpleColor], nil];
if(changeCount < 7){
imageColor1 = [colors objectAtIndex:changeCount];
}
else{
changeCount = changeCount - 5;
imageColor1 = [colors objectAtIndex:changeCount];
}
if(changeCount1 < 7){
imageColor2 = [colors objectAtIndex:changeCount1];
}
else{
changeCount1 = changeCount1 - 5;
imageColor2 = [colors objectAtIndex:changeCount1];
}
changeCount++;
changeCount1++;
}
基本上,每当用户点击“更改颜色”按钮时,变量changeCount 和changeCount1 的计数都会增加,而self.imageColor1 和self.imageColor2 中的值会更改为数组@ 中的后续值987654326@。由于某种原因,此代码不起作用,颜色也不会改变。 createButton 方法之所以有效,是因为每当我按下它时,都会出现一个新按钮,但如果我创建一个按钮,然后按下更改颜色按钮,然后再创建另一个按钮,则新按钮的颜色仍然相同。所以基本上我需要知道我的代码有什么问题。提前致谢。
【问题讨论】:
标签: objective-c ios uiview colors