since: 2012/07/24
update: 2012/07/24
reference:
1. The iOS 5 Developer's Cookbook, 3/e
"記錄設備上次的擺放方向" 與 "調整按鈕位置"
A. 說明:
1. 將移除不再使用的 "設備上一次方向是否為水平擺放" 之變數:
isPreviousOrientationLandscape, 改成由 lastOrientation 來判斷.
2. "記錄設備上次的擺放方向", 由於只需要記錄: 直擺, 直擺且上下顛倒, 橫擺朝右
與橫擺朝左共 4 種情況, 因此會在 shouldAutorotateToInterfaceOrientation:
方法中處理.
3. 在 shouldAutorotateToInterfaceOrientation: 方法中, 無法即時偵測到:
設備面朝上, 面朝下與未知的情況. 因此會將這三種情況(FaceUp, FaceDown
與 Unknown) 的偵測, 置於 orientationTransform: 方法內, 以協助在開發的
過程中除錯. (只有當有套用濾鏡功能時, 才會去呼叫 drawFilteredImage: ,
因此不放在此方法處理)
4. orientationTransform: 與 drawFilteredImage: 方法, 皆會被
captureOutput:didOutputSampleBuffer:fromConnection: 頻繁地呼叫,
因此除了螢幕繪製的相關內容之處理, 儘量不要在其中處理其它的事情.
5. 調整按鈕的基本擺放位置, 將在 shouldAutorotateToInterfaceOrientation:
方法中作適當處理.
-------------------------------------------------------------------------------
B. 開啟 ViewController.h 檔案, 修改如下:
....
@interface ViewController : GLKViewController <AVCaptureVideoDataOutputSampleBufferDelegate, UITableViewDelegate, UITableViewDataSource>
{
....
BOOL isUsingFrontCamera; // 目前使用前置鏡頭?
BOOL isLastFrontCamera; // 上次是前置鏡頭?
//@add 設備上一次方向是否為水平擺放(向左或向右皆算)
//BOOL isPreviousOrientationLandscape;
BOOL applyFilter; // 是否套用濾鏡?
....
}
....
@property (assign) BOOL isUsingFrontCamera;
@property (assign) BOOL isLastFrontCamera;
//@property (assign) BOOL isPreviousOrientationLandscape;
@property (assign) BOOL applyFilter;
....
-------------------------------------------------------------------------------
C. 開啟 ViewController.m 檔案, 修改如下:
....
// step 01:
@synthesize isUsingFrontCamera = _isUsingFrontCamera;
@synthesize isLastFrontCamera = _isLastFrontCamera;
//@synthesize isPreviousOrientationLandscape = _isPreviousOrientationLandscape;
@synthesize applyFilter = _applyFilter;
....
// step02:
- (void)viewDidLoad
{
....
/*
UIDeviceOrientation orientation = [[UIDevice currentDevice] orientation];
if (orientation == UIDeviceOrientationLandscapeRight ||
orientation == UIDeviceOrientationLandscapeLeft) {
self.isPreviousOrientationLandscape = YES;
}
else {
self.isPreviousOrientationLandscape = NO;
}
*/
....
}
....
// step 03:
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
//@add
GlobalDataClass *dataObj = [GlobalDataClass getInstance];
CGFloat filterCellRotationAngle; // filterCell Rotation Angle
/*
if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone) {
return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
} else {
return YES;
}
*/
// ############# //
// A. 設備垂直擺放 //
// ############# //
if (interfaceOrientation == UIDeviceOrientationPortrait)
{
lastOrientation = Portrait; // 記錄為上次: 直擺
NSLog(@"lastOrientation = Portrait");
//@update: Tune UI
[self.filterLensImageView setFrame:CGRectMake(20, 120, 280, 280)];
//@add for Button
/*
[self.saveButton setFrame:CGRectMake(10, 420, 66, 40)];
[self.switchButton setFrame:CGRectMake(87, 420, 66, 40)];
[self.torchButton setFrame:CGRectMake(164, 420, 66, 40)];
[self.observerButton setFrame:CGRectMake(241, 420, 66, 40)];
*/
//@update: 調整按鈕相對於 buttonView 的位置
[self.buttonView setFrame:CGRectMake(0, 398, 320, 82)];
[self.saveButton setFrame:CGRectMake(10, 22, 66, 40)];
[self.switchButton setFrame:CGRectMake(87, 22, 66, 40)];
[self.torchButton setFrame:CGRectMake(164, 22, 66, 40)];
[self.observerButton setFrame:CGRectMake(241, 22, 66, 40)];
//@update: Tune for Orientation
self.filterListTableView.transform = CGAffineTransformMakeRotation(-M_PI * 2.0);
[self.filterListTableView setFrame:CGRectMake(0, 0, self.view.frame.size.width, kOverlayTableViewRowHeight)];
filterCellRotationAngle = M_PI * 0.5;
}
// #################### //
// B. 設備垂直 180 度擺放 //
// #################### //
else if (interfaceOrientation == UIDeviceOrientationPortraitUpsideDown)
{
lastOrientation = PortraitUpsideDown; // 記錄為上次: 直擺, 上下顛倒
NSLog(@"lastOrientation = PortraitUpsideDown");
//@update: Tune UI
[self.filterLensImageView setFrame:CGRectMake(20, 120, 280, 280)];
//@add for Button
/*
[self.saveButton setFrame:CGRectMake(10, 420, 66, 40)];
[self.switchButton setFrame:CGRectMake(87, 420, 66, 40)];
[self.torchButton setFrame:CGRectMake(164, 420, 66, 40)];
[self.observerButton setFrame:CGRectMake(241, 420, 66, 40)];
*/
//@update: 調整按鈕相對於 buttonView 的位置
[self.buttonView setFrame:CGRectMake(0, 398, 320, 82)];
[self.saveButton setFrame:CGRectMake(10, 22, 66, 40)];
[self.switchButton setFrame:CGRectMake(87, 22, 66, 40)];
[self.torchButton setFrame:CGRectMake(164, 22, 66, 40)];
[self.observerButton setFrame:CGRectMake(241, 22, 66, 40)];
//@update: Tune for Orientation
self.filterListTableView.transform = CGAffineTransformMakeRotation(-M_PI * 2.0);
[self.filterListTableView setFrame:CGRectMake(0, 0, self.view.frame.size.width, kOverlayTableViewRowHeight)];
filterCellRotationAngle = M_PI * 0.5;
}
// ################# //
// C. 設備水平向右擺放 //
// ################# //
else if (interfaceOrientation == UIDeviceOrientationLandscapeRight)
{
lastOrientation = LandscapeRight; // 記錄為上次: 橫擺朝右
NSLog(@"lastOrientation = LandscapeRight");
//@update: Tune UI
[self.filterLensImageView setFrame:CGRectMake(120, 20, 280, 280)];
//@add for Button
/*
[self.saveButton setFrame:CGRectMake(406, 32, 66, 40)];
[self.switchButton setFrame:CGRectMake(406, 104, 66, 40)];
[self.torchButton setFrame:CGRectMake(406, 176, 66, 40)];
[self.observerButton setFrame:CGRectMake(406, 248, 66, 40)];
*/
//@update: 調整按鈕相對於 buttonView 的位置
[self.buttonView setFrame:CGRectMake(398, 22, 82, 278)];
[self.saveButton setFrame:CGRectMake(8, 10, 66, 40)];
[self.switchButton setFrame:CGRectMake(8, 82, 66, 40)];
[self.torchButton setFrame:CGRectMake(8, 154, 66, 40)];
[self.observerButton setFrame:CGRectMake(8, 226, 66, 40)];
//@update: Tune for Orientation
self.filterListTableView.transform = CGAffineTransformMakeRotation(M_PI * 0.5);
[self.filterListTableView setFrame:CGRectMake(0, 0, kOverlayTableViewRowHeight, self.view.frame.size.width)];
filterCellRotationAngle = 0.0;
}
// ################# //
// D. 設備水平向左擺放 //
// ################# //
else if (interfaceOrientation == UIDeviceOrientationLandscapeLeft)
{
lastOrientation = LandscapeLeft; // 記錄為上次: 橫擺朝左
NSLog(@"lastOrientation = LandscapeLeft");
//@update: Tune UI
[self.filterLensImageView setFrame:CGRectMake(120, 20, 280, 280)];
//@add for Button
/*
[self.saveButton setFrame:CGRectMake(406, 32, 66, 40)];
[self.switchButton setFrame:CGRectMake(406, 104, 66, 40)];
[self.torchButton setFrame:CGRectMake(406, 176, 66, 40)];
[self.observerButton setFrame:CGRectMake(406, 248, 66, 40)];
*/
//@update: 調整按鈕相對於 buttonView 的位置
[self.buttonView setFrame:CGRectMake(398, 22, 82, 278)];
[self.saveButton setFrame:CGRectMake(8, 10, 66, 40)];
[self.switchButton setFrame:CGRectMake(8, 82, 66, 40)];
[self.torchButton setFrame:CGRectMake(8, 154, 66, 40)];
[self.observerButton setFrame:CGRectMake(8, 226, 66, 40)];
//@update: Tune for Orientation
self.filterListTableView.transform = CGAffineTransformMakeRotation(M_PI * 0.5);
[self.filterListTableView setFrame:CGRectMake(0, 0, kOverlayTableViewRowHeight, self.view.frame.size.width)];
filterCellRotationAngle = 0.0;
}
// ################################# //
// E. 其它: FaceUp, FaceDown, Unknown //
// ################################## //
else
{
// 1. 在此, 不記錄上一次設備的方向
// 2. 在此無法即時偵測到其它情況:
// UIDeviceOrientationFaceUp, UIDeviceOrientationFaceDown,
// UIDeviceOrientationUnknown
//@update: Tune UI
[self.filterLensImageView setFrame:CGRectMake(120, 20, 280, 280)];
//@add for Button
/*
[self.saveButton setFrame:CGRectMake(406, 32, 66, 40)];
[self.switchButton setFrame:CGRectMake(406, 104, 66, 40)];
[self.torchButton setFrame:CGRectMake(406, 176, 66, 40)];
[self.observerButton setFrame:CGRectMake(406, 248, 66, 40)];
*/
//@update: 調整按鈕相對於 buttonView 的位置
[self.buttonView setFrame:CGRectMake(398, 22, 82, 278)];
[self.saveButton setFrame:CGRectMake(8, 10, 66, 40)];
[self.switchButton setFrame:CGRectMake(8, 82, 66, 40)];
[self.torchButton setFrame:CGRectMake(8, 154, 66, 40)];
[self.observerButton setFrame:CGRectMake(8, 226, 66, 40)];
//@update: Tune for Orientation
self.filterListTableView.transform = CGAffineTransformMakeRotation(M_PI * 0.5);
[self.filterListTableView setFrame:CGRectMake(0, 0, self.view.frame.size.width, kOverlayTableViewRowHeight)];
filterCellRotationAngle = M_PI * 0.5;
}
//@add
if (dataObj.filterCellArray.count > 0) {
for (FilterCell* filterCell in dataObj.filterCellArray) {
filterCell.transform = CGAffineTransformMakeRotation(filterCellRotationAngle);
}
}
return YES;
}
....
// step04:
- (void)drawFilteredImage:(CIImage *)sourceImage
{
....
// 設備垂直擺放
if (orientation == UIDeviceOrientationPortrait)
{
//self.isPreviousOrientationLandscape = NO;
....
}
// 設備垂直 180 度擺放
else if (orientation == UIDeviceOrientationPortraitUpsideDown)
{
//self.isPreviousOrientationLandscape = NO;
....
}
// 設備水平向右擺放
else if (orientation == UIDeviceOrientationLandscapeRight)
{
//self.isPreviousOrientationLandscape = YES;
....
}
// 設備水平向左擺放(最穩定)
else if (orientation == UIDeviceOrientationLandscapeLeft)
{
//self.isPreviousOrientationLandscape = YES;
....
}
// 其它 (UIDeviceOrientationFaceUp, UIDeviceOrientationFaceDown,
// UIDeviceOrientationUnknown)
else
{
// 上一次設備為水平擺放
// if (self.isPreviousOrientationLandscape == YES)
if (lastOrientation == LandscapeRight || lastOrientation == LandscapeLeft)
{
....
}
//@add:上一次設備為垂直擺放
else
{
....
}
}
}
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