终于弄明白iPad UIPopoverController弹出窗口的位置和坐标了
Posted on 2011-06-10 14:59 BradyChen 阅读(5366) 评论(0) 编辑 收藏 举报转载 http://xyyk.iteye.com/category/56505?show_full=true
系统优化的我一愣一愣的，原来是下面的优化规则
TodoViewController *contentViewController = [[TodoViewController alloc] init];
UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:contentViewController];
navigationController.contentSizeForViewInPopover = CGSizeMake(100, 100); //内容大小
UIPopoverController *popover = [[UIPopoverController alloc] initWithContentViewController:navigationController];
popover.popoverContentSize = CGSizeMake(300, 300); //弹出窗口大小，如果屏幕画不下，会挤小的。这个值默认是320x1100
CGRect popoverRect = CGRectMake(200, 700, 10, 10);
[popover presentPopoverFromRect:popoverRect //popoverRect的中心点是用来画箭头的，如果中心点如果出了屏幕，系统会优化到窗口边缘
inView:self.view //上面的矩形坐标是以这个view为参考的
permittedArrowDirections:UIPopoverArrowDirectionDown //箭头方向
animated:YES];
[contentViewController release];
[navigationController release];
//最佳实践，使用哪个view做参考，就以哪个view的bounds送进去就好了，箭头自动指向这个view的中心
UINavigationBar自定义导航栏背景和按钮，完美支持横屏竖屏旋转，视图控制器可以分别使用自己的导航栏
此方法可以通过Apple审核，导航上的按钮背景需要做，否则看起来不那么和之又谐
//CustomNavigationBar.h
@interface UINavigationBar (UINavigationBarCategory)
UIImageView *backgroundView;
- (void)setBackgroundImage:(UIImage*)image;
- (void)insertSubview:(UIView *)view atIndex:(NSInteger)index;
@end
//CustomNavigationBar.m
@implementation UINavigationBar (UINavigationBarCategory)
-(void)setBackgroundImage:(UIImage*)image
{
if(image == nil)
{
[backgroundView removeFromSuperview];
}
else
{
backgroundView = [[UIImageView alloc] initWithImage:image];
backgroundView.tag = 1;
backgroundView.frame = CGRectMake(0.f, 0.f, self.frame.size.width, self.frame.size.height);
backgroundView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
[self addSubview:backgroundView];
[self sendSubviewToBack:backgroundView];
[backgroundView release];
}
}
//for other views
- (void)insertSubview:(UIView *)view atIndex:(NSInteger)index
{
[super insertSubview:view atIndex:index];
[self sendSubviewToBack:backgroundView];
}
@end
//YourViewController.m
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
[self.navigationController.navigationBar
setBackgroundImage:[UIImage imageNamed:@"navigation_bar_bg.png"]];
}
创建按钮
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom]; button.frame = CGRectMake(10.0, 10.0, 100.0, 40.0); [button setTitle:@"Normal" forState:UIControlStateNormal]; UIImage *image = [UIImage imageNamed:@"normal.png"]; UIImage *newImage = [image stretchableImageWithLeftCapWidth:12.0 topCapHeight:0.0]; [button setBackgroundImage:newImage forState:UIControlStateNormal]; button.adjustsImageWhenHighlighted = NO; [button addTarget:self action:@selector(buttonSwitch:) forControlEvents:UIControlEventTouchDown]; [self.view addSubview:button];
事件处理
-(void)buttonSwitch:(id)sender
{
static BOOL isHighlighted = NO;
UIButton *button = (UIButton*)sender;
UIImage *image = nil;
NSString *title = nil;
if (isHighlighted)
{
title = @"Normal";
image = [UIImage imageNamed:@"normal.png"];
}
else
{
title = @"Hightlight";
image = [UIImage imageNamed:@"highlight.png"];
}
[button setTitle:title forState:UIControlStateNormal];
UIImage *newImage = [image stretchableImageWithLeftCapWidth:12.0 topCapHeight:0.0];
[button setBackgroundImage:newImage forState:UIControlStateNormal];
isHighlighted = !isHighlighted;
}
Xcode代码提示生成源代码程序块默认格式如下，注意左花括号的位置：
if ( condition ) {
do ...
}
因为以前的使用习惯，我想让自动生成的左右花括号都单独成行，变成下面的样子：
if ( condition )
{
do ...
}
在Terminal里面，运行下面命令，然后重启Xcode：
defaults write com.apple.Xcode XCCodeSenseFormattingOptions -dict BlockSeparator "\n"这个命令修改了~/Library/Preferences/com.apple.Xcode.plist，这是Xcode的配置文件
比如地图导航数据G级别的数据，模拟器调试的时候将是个恶梦
后面要做一个导航类应用程序，所以未雨绸缪先纪录下来
设备调试时，把测试数据尽量最小化吧
模拟器调试时，使用固定路径，指定到程序外路径，模拟器貌似没有沙盒，下面代码在模拟器里是可以读取文件的。设备调试时改为resources
NSDictionary *dict = [NSDictionary dictionaryWithContentsOfFile:@"/Users/george/Desktop/Test.plist"];
