iOS 定义按钮

定义按钮：

UIButton*scaleUpButton = [UIButton buttonWithType: UIButtonTypeRoundedRect];
[scaleUpButton setTitle:@"按钮"forState:UIControlStateNormal];
scaleUpButton.frame = CGRectMake(40,420,100,40);
[scaleUpButton addTarget: self action:@selector(scaleUp) forControlEvents: UIControlEventTouchUpInside];

希望对你有帮助！