ios - 警告 : 'isTouchInside' in If Condition

Question

目标:

• 当触摸内部时，按钮背景图像发生变化

代码:

- (void)addMyButton{    // Method for creating button, with background image and other properties

    UIButton *playButton = [[UIButton buttonWithType:UIButtonTypeRoundedRect] retain];
    [self.view addSubview:playButton];
    playButton.frame = CGRectMake(150, 150, 100, 100);
    //set title,backgroundcolor...

    UIImage *buttonImageNormal = [UIImage imageNamed:@"red.png"];
    UIImage *strechableButtonImageNormal = [buttonImageNormal stretchableImageWithLeftCapWidth:0 topCapHeight:0];
    [playButton setBackgroundImage:strechableButtonImageNormal forState:UIControlStateNormal];

    if([playButton isTouchInside:[UIImage buttonImageNormal]]) //This line warning
    {
        UIImage *buttonImageNormal2 = [UIImage imageNamed:@"yellow.png"];
        UIImage *strechableButtonImageNormal2 = [buttonImageNormal2 stretchableImageWithLeftCapWidth:12 topCapHeight:0];
        [playButton setBackgroundImage:strechableButtonImageNormal2 forState:UIControlStateNormal];

    }
}

请告诉我我目前在警告行中做了什么。告诉我错误是什么。并告诉我“isTouchInside”的语法。如果你愿意，请完成我的目标。

Answer 1

尝试改变:

if([playButton isTouchInside:[UIImage buttonImageNormal]])

收件人:

if([playButton isTouchInside])

isTouchInside 不接受任何参数