状态栏20键盘高度216导航44最少2位补0//UIColor*color2=[[UIColoralloc]initWithRed:0green:1blue:0alpha:1];//buttonsetTitle:@"点我吧"forState:UIControlStateNormal];//[buttonaddTarget:selfaction:@selector(buttonClick)forControlEvents:UIControlEventTouchUpInside];Target目标action行动[button