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我將子類UIButton
創建一個簡單的複選框行爲。這裏是代碼:子類簡單的UIButton複選框
#import "RadioButton.h"
@implementation RadioButton
@synthesize isSelected;
-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event{
[self ChangeButtonState];
}
-(void)ChangeButtonState{
if (!isSelected) {
isSelected = YES;
[self setBackgroundImage:[UIImage imageNamed:@"radiobtn_on.png"] forState:UIControlStateNormal];
}
else{
isSelected = NO;
[self setBackgroundImage:[UIImage imageNamed:@"radiobtn_off.png"] forState:UIControlStateNormal];
}
}
-(id)init{
self.adjustsImageWhenHighlighted=YES;
self.alpha = 1;
[self ChangeButtonState];
isSelected = NO;
[self setBackgroundImage:[UIImage imageNamed:@"radiobtn_off.png"] forState:UIControlStateNormal];
return self;
}
- (id)initWithFrame:(CGRect)frame
{
[self setBackgroundImage:[UIImage imageNamed:@"radiobtn_off.png"] forState:UIControlStateNormal];
isSelected = NO;
self = [super initWithFrame:frame];
if (self) {
// Initialization code
}
return self;
}
/*
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect
{
// Drawing code
}
*/
@end
第一,當我在界面生成器的按鈕設置類,當我啓動應用程序,我沒有看到任何東西,直到我打這個無形的按鈕。
的seconed的就是圖像看起來黑暗那麼原來
幫助將是巨大的! 謝謝!
第一個問題現在沒問題,在按下按鈕之前,圖片加載好了,當我按下按鈕時,它變得更加黑暗。 – 2013-04-08 07:11:03
你在做錯事 - (id)initWithFrame:(CGRect)frame { [self setBackgroundImage:[UIImage imageNamed:@「radiobtn_off.png」] forState:UIControlStateNormal]; isSelected = NO; self = [super initWithFrame:frame]; if(self){ //初始化代碼 } return self; }初始化自己的bcz後,你總是必須做你的東西,它可能會返回零。 – 2013-04-08 07:21:52
拿到它 代碼從nib移到醒來。但這個「變暗」仍然發生 – 2013-04-08 07:27:16