O(∩_∩)O哈哈哈~醉了我看的。。。
小伙子,VC的UI应该在xib,storyboard上实现,或者纯代码这,应该在VC.m的loadview方法里初始化UI,
其次,你的textfield不应该是加在window上,而是加在vc的view上。即:
@implememtation
-(void)loadView
{
[super loadView];
UITextField * textField=[[UITextField alloc]initWithFrame:CGRectMake(10, 40, 100, 50)];
textField.placeholder = @"hello,";
[self.view addSubview:textField];
}
然后,在你的上述代码中,删除以下代码:
UITextField * text=[[UITextField alloc]initWithFrame:CGRectMake(10, 40, 100, 50)];
text.backgroundColor=[UIColor blueColor];
text.textColor=[UIColor greenColor];
text.text=@"IOSIOSIOS";
text.textAlignment=NSTextAlignmentCenter;
text.keyboardType=UIKeyboardTypeNamePhonePad;
[self.window addSubview:text];