UIButton的使用

UIButton *but = [[UIButton alloc]init];

but.frame = CGRectMake(30, 30, 100, 100);

//设置button的颜色

//but.backgroundColor = [UIColor redColor];

//设置button上显示的字的颜色

[but setTitleColor:[UIColor redColor] forState:UIControlStateNormal];

//设置button上显示的字

//but.titleLabel.text = @"按钮";

//这是在未点击状态下

[but setTitle:@"按钮" forState:UIControlStateNormal ];

//设置字体大小

but.titleLabel.font = [UIFont boldSystemFontOfSize:20];

//设置背景图片，标题在背景图上

//[but setBackgroundImage:[UIImage imageNamed:@"1"] forState:UIControlStateNormal];

// [but setBackgroundImage:[UIImage imageNamed:@"2"] forState:UIControlStateHighlighted];

//标题在背景图左边

[but setImage:[UIImage imageNamed:@"1"] forState:UIControlStateNormal];

[but setImage:[UIImage imageNamed:@"2"] forState:UIControlStateHighlighted];

but.imageEdgeInsets = UIEdgeInsetsMake(0, 30, 0, 0);

//设置按钮的圆角半径不会被遮挡

[but.layer setMasksToBounds:YES];

//设置圆角的半径

[but.layer setCornerRadius:30];

//设置边界的宽度

[but.layer setBorderWidth:1];

[self.view addSubview:but];

-(void)buttonClicked:(UIButton *)btn{

_label.text = [NSString stringWithFormat:@"%zi",btn.tag];

NSLog(@"按钮%zi被点击",btn.tag);
}