ios学习笔记

1：如何设置背景透明        lbl.backgroundColor=[UIColor clearColor];
2：如何设置UIViewControl的frame属性    myViewControl.view.frame = CGRectMake(0, 0, 320 , 100);
3：分别获得  CGRect中的4个属性值（view frame）       view.frame.origin.x, frame.origin.y, frame.size.width, frame.size.height
4：如何用代码添加事件：    [button addTarget:self action:@selector(buttonClicked) forControlEvents:UIControlEventTouchUpInside];
5: 设置UIButton的自定义样式风格：　　　　在属性栏，选择Type=custon
6：OS4使用自定义动画，以及动画完成后自动调用方法
[UIView animateWithDuration:0.5 delay:0 options:UIViewAnimationTransitionCurlUp animations:^{ [UIView setAnimationTransition:UIViewAnimationTransitionCurlUp forView:self.view cache:YES]; // [delegate ContentView_UnLoad]; // self.view.center = CGPointMake(self.view.center.x, self.view.center.y+480.0); } completion:^(BOOL finished){ if (finished){ [self unLoadMe]; //[delegate ContentView_UnLoad]; } } ];
　　　　　　　　　
7：，当页面跳转时，使用系统自带动画：  
//当前页  被跳转页
nContentView=[[UserNewsContentView alloc] initWithNibName:@"UserNewsContentView" bundle:nil SetTypeID:typeStr SetTitleID:titleStr]; [self presentModalViewController:nContentView animated:YES];
//跳转页
-(IBAction)btnContent_click:(id)sender{
    [self dismissModalViewControllerAnimated:YES];
}
　　　　　　　　　　　　  　　
8:时间戳转换为日期：
NSDate* dat = [NSDate dateWithTimeIntervalSince1970:1319939453];

9：日期转换是星期几：NSDateComponents *weekdayComponents = [[NSCalendar currentCalendar] components:NSWeekdayCalendarUnit fromDate:dat]; int weekday = [weekdayComponents weekday]; NSLog(@"%d",weekday); NSLog(@"%@",dat);

10:请问 怎么查看一个view得superview？       [view.superview  description]


// [((AppDelegate *)[UIApplication sharedApplication].delegate).window.rootViewController dismissModalViewControllerAnimated:YES]; [((AppDelegate *)[UIApplication sharedApplication].delegate).menuViewController dismissModalViewControllerAnimated:YES]; //[self.presentingViewController.presentingViewController dismissModalViewControllerAnimated:NO];

11：
利用QuartzCore为UIView视图添加border以及圆角
2011年04月20日 星期三 16:26
首先引入QuartzCore/QuartzCore.h到类中
然后如下使用:

UITextView*yourTextView=[[UITextView alloc] initWithFrame:CGRectMake(0,200,200,100)];
[yourTextView.layer setBackgroundColor: [[UIColor whiteColor] CGColor]];
    [yourTextView.layer setBorderColor:[[UIColor grayColor]CGColor]];
    [yourTextView.layer setBorderWidth:1.0];
    [yourTextView.layer setCornerRadius:8.0f];
    [yourTextView.layer setMasksToBounds:YES];

12遍历一个View的子视图并且删除
for (UIView *oneView in ViewBody.subviews ) {            
        [oneView removeFromSuperview];
    }