学步园

在使用uibutton的时候，一般用

    UIButton*buttonrecommend = [[UIButton
alloc]initWithFrame:CGRectMake(0,
80, 100, 40)];

    buttonrecommend.tag =
13;

    [buttonrecommend setTitle:@"热门商家" forState:UIControlStateNormal];

    [buttonrecommend setTitle:@"热门商家" forState:UIControlStateHighlighted];

    [buttonrecommend setTitleColor:[UIColor
blackColor] forState:UIControlStateNormal];

    //    [buttonrecommend setTitleColor:[UIColor blackColor] forState:UIControlStateHighlighted];

    [buttonrecommend setBackgroundImage:[UIImage
imageNamed:@"beijingtiao.png"]
forState:UIControlStateNormal];

    [buttonrecommend setBackgroundImage:[UIImage
imageNamed:@"beijingtiao.png"]
forState:UIControlStateHighlighted];

    [buttonrecommend addTarget:self
action:@selector(list:)
forControlEvents:UIControlEventTouchUpInside];

设置title的时候用

buttonrecommend.titlelabel = @"热门商家";用不了原因如下