关于UIBotton的高亮显示图片的一个小问题

来源：互联网发布：西数黑盘和蓝盘知乎编辑：程序博客网时间：2024/06/06 13:20

下面这短代码是我建立的一个UIBotton : deleteButton

// 删除

deleteButton = [[UIButton alloc] initWithFrame:CGRectMake(51, 5, 79, 23)];

deleteButton.backgroundColor = [UIColor clearColor];

[deleteButton setBackgroundImage:[UIImage imageNamed:@"Delete.png"] forState:UIControlStateNormal];

[deleteButton setImage:[UIImage imageNamed:@"Delete_e.png"] forState:UIControlStateHighlighted];

[deleteButton addTarget:self action:@selector(delete:) forControlEvents:UIControlEventTouchUpInside];

deleteButton.enabled=NO;

[self addSubview:deleteButton];

假如将命令修改为:[deleteButton addTarget:self action:@selector(delete:) forControlEvents:UIControlEventTouchDown];

那么Delete_e.png

这张图片在点击高亮的时候,就不会替换背景显示出来.

另外附使用到的deletButton函数.

1.使deleteButton有效的一个方法:

- (void)closeChunk
{
if(isChunkClosed)return;
[self performSelector:@selector(animaCloseChunk:)];
if(newBlocks[selctNewBlockIndex].type==kBlockTypeSigned){
[deleteButton setBackgroundImage:[UIImage imageNamed:@"Delete_Green.png"] forState:UIControlStateNormal];
[deleteButton setImage:[UIImage imageNamed:@"Delete_Red.png"] forState:UIControlStateHighlighted];
deleteButton.enabled=YES;
}else{
[deleteButton setBackgroundImage:[UIImage imageNamed:@"Delete.png"] forState:UIControlStateNormal];
[deleteButton setImage:[UIImage imageNamed:@"Delete.png"] forState:UIControlStateHighlighted];
deleteButton.enabled=NO;
}
}

2.deletButton方法:

- (void)delete:(id)sender{
[deleteButton setBackgroundImage:[UIImage imageNamed:@"Delete.png"] forState:UIControlStateNormal];
[deleteButton setImage:[UIImage imageNamed:@"Delete.png"] forState:UIControlStateHighlighted];
deleteButton.enabled=NO;
}