iOS Button 按钮 设置图片在文字的右边

     UIButton * cityBtn=[UIButtonbuttonWithType:UIButtonTypeCustom];

    [cityBtn setTitle:@"上海"forState:UIControlStateNormal];

    [cityBtn setImage:[UIImageimageNamed:@"icon"]forState:UIControlStateNormal];

//最重要是下面两行设置图片与文字的间距

    cityBtn.titleEdgeInsets=UIEdgeInsetsMake(0, -70,0,0);//上左下右

    cityBtn.imageEdgeInsets=UIEdgeInsetsMake(13,30,13, 30);

    cityBtn.frame=CGRectMake(60,0,80, 40);

    [self.view addSubview:cityBtn];