原文地址:http://www.cnblogs.com/pinping/archive/2012/10/12.html(感谢原作者的奉献)
NSLog(@"applicationFrame%f",[UIScreenmainScreen].applicationFrame.size.height);
可以的到整个程序的View的大小
NSLog(@"navigationBar%f",self.navigationController.navigationBar.frame.size.height);
NSLog(@"navigationBar%f",self.tabBarController.tabBar.frame.size.height);
floatheightEg = [UIScreenmainScreen].applicationFrame.size.height - self.navigationController.navigationBar.frame.size.height -self.tabBarController.tabBar.frame.size.height;
LeftView*lView=[[LeftView alloc] initWithFrame:CGRectMake(0, 0, 56, heightEg) Number:1];
[self.view addSubview:lView];
现在的lView就个适用iPhone 4/S 和iPhone 5那;
因为的程序里面有navigationController和tabBarController所以要减去navigationController和tabBarController的高度;
posted @ 2012-10-12 15:03 程序是啥 阅读(672) 评论(0) 编辑 iOS 6 Auto Layout NSLayoutConstraint 界面布局
来自:http://www.devdiv.com/iOS_6_Auto_Layout_NSLayoutConstraint_界面布局-weblog-227936-13173.html
终于ios 6推出了正式版本,同时也随之iphone5的面试,对于ios开发者来说,也许会感觉到一些苦恼。那就是原本开发的程序,需要大量的修改了。为了适应最新的iphone5的屏幕。
在WWDC2012里苹果推出了,Auto Layout的概念。我们可以通过Auto Layout来适应屏幕的改变。
比如我们要做一个如下的界面。
如果按照以前的frame的方式的话,大概代码如下
[代码]c#/cpp/oc代码: 01UIView *myview = [[UIView alloc] init]; 02myview.backgroundColor = [UIColor greenColor]; 03UIView *redView = [[UIView alloc] init]; 04redView.backgroundColor = [UIColor redColor]; 05UIView *blueView = [[UIView alloc] init]; 06blueView.backgroundColor = [UIColor blueColor]; 07[myview addSubview:redView]; 08[myview addSubview:blueView]; 09redView.frame = CGRectMake(50, 80, 100, 30); 10blueView.frame = CGRectMake(180, 80, 100, 30); 11self.view = myview;
通过上面的代码我们就能很简单的实现上面的布局效果了,但是使用auto layout的时候我们需要使用如下代码来实现。
[代码]c#/cpp/oc代码: view source print ? 01UIView *myview = [[UIView alloc] init]; 02 03myview.backgroundColor = [UIColor greenColor]; 04 05UIView *redView = [[UIView alloc] init]; 06 07redView.backgroundColor = [UIColor redColor]; 08 09UIView *blueView = [[UIView alloc] init]; 10 11blueView.backgroundColor = [UIColor blueColor]; 12 13[myview addSubview:redView]; 14 15[myview addSubview:blueView]; 16 17[myview setTranslatesAutoresizingMaskIntoConstraints:NO]; 18 19[redView setTranslatesAutoresizingMaskIntoConstraints:NO]; 20 21[blueView setTranslatesAutoresizingMaskIntoConstraints:NO]; 22 23NSMutableArray *tmpConstraints = [NSMutableArray array]; 24 25[tmpConstraints addObjectsFromArray:[NSLayoutConstraint constraintsWithVisualFormat:@"|-50-[redView(==100)]-30-[blueView(==100)]" options:0 metrics:nil views:NSDictionaryOfVariableBindings(redView,blueView)]]; 26 27[tmpConstraints addObjectsFromArray:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|-30-[redView(==30)]" options:0 metrics:nil views:NSDictionaryOfVariableBindings(redView)]]; 28 29[tmpConstraints addObjectsFromArray:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|-30-[blueView(==redView)]" options:0 metrics:nil views:NSDictionaryOfVariableBindings(blueView,redView)]]; 30 31[myview addConstraints:tmpConstraints]; 32 33self.view = myview;
最后对于向下兼容的时候我们可以通过
[代码]c#/cpp/oc代码: 1if([myview respondsToSelector:@selector(addConstraints:)]){ 2 3//支持auto layout 4 5}else{ 6 7//不支持 8 9}