UIButton *testButton = [UIButton buttonWithType:UIButtonTypeSystem];
[testButton setFrame:CGRectMake(self.view.frame.size.width/2, self.view.frame.size.height/2, 100,100)];
[testButton setTitle:@"获取屏幕尺寸" forState:UIControlStateNormal];
[testButton.layer setMasksToBounds:YES];//设置按钮的圆角半径不会被遮挡
[testButton.layer setCornerRadius:10];
[testButton.layer setBorderWidth:2];//设置边界的宽度
//设置按钮的边界颜色
CGColorSpaceRef colorSpaceRef = CGColorSpaceCreateDeviceRGB();
CGColorRef color = CGColorCreate(colorSpaceRef, (CGFloat[]){1,0,0,1});
[testButton.layer setBorderColor:color];
[testButton addTarget:self action:@selector(touch)forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:testButton];