实施UIGestureRecognizerDelegate

Question

我试着从下面的文章得到同步平移和捏，但是我不认为委托因为即时通讯看到没有影响正常勾搭上了。现在我有一个锅和一个捏手势识别，无论工作。我做IBOutlets我的ViewController，在我的viewController初始化有：

编辑

这里是标头和实现文件分别。

头：

#import <UIKit/UIKit.h> 
#import <OpenGLES/EAGL.h> 
#import <OpenGLES/ES1/gl.h> 
#import <OpenGLES/ES1/glext.h> 

@class GLView; 
@interface GLViewController : UIViewController <UIGestureRecognizerDelegate> 

@property (strong, nonatomic) IBOutlet UIPinchGestureRecognizer *pinchRecognizer; 
@property (strong, nonatomic) IBOutlet UIPanGestureRecognizer *panRecognizer; 

- (IBAction)handlePinch:(UIPinchGestureRecognizer *)recognizer; 
- (IBAction)handlePan:(UIPanGestureRecognizer *)recognizer; 
- (void)drawView:(GLView*)view; 
- (void)setupView:(GLView*)view; 

@property (retain, nonatomic) IBOutlet UILabel *zoomFactorLabel; 
@property (retain, nonatomic) IBOutlet UILabel *xPosLabel; 
@property (retain, nonatomic) IBOutlet UILabel *yPosLabel; 

@end 

    panRecognizer.minimumNumberOfTouches = 1; 
    panRecognizer.delegate = self; // Very important 
    pinchRecognizer.delegate = self; // Very important 

实现：

#import "GLViewController.h" 
#import "GLView.h" 
#import "OpenGLCommon.h" 
#import "ConstantsAndMacros.h" 
#import "TileManager.h" 
#import <CoreGraphics/CoreGraphics.h> 

@implementation GLViewController 
@synthesize pinchRecognizer; 
@synthesize panRecognizer; 

@synthesize zoomFactorLabel; 
@synthesize xPosLabel; 
@synthesize yPosLabel; 
TileManager* tileManager; 
CGPoint currentPosition; 
CGPoint start; 
CGFloat temp = 0; 
CGFloat x=0; 
CGFloat y=0; 
CGFloat mLastScale=1; 
CGFloat mCurrentScale=1; 
CGPoint translation; 
- (id) init { 
    self = [super init]; 
    if (self != nil) { 
     printf("GLViewController initialized."); 
     tileManager=[[TileManager alloc] init]; 
     currentPosition = CGPointMake(0, 0); 
    } 
    return self; 
} 
CGFloat scale=1; 
CGPoint position; 
CGPoint mid; 


#pragma mark - UIGestureRecognizerDelegate 

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizershouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer 
{ 
    NSLog(@"delegate called"); 

      // If you have multiple gesture recognizers in this delegate, you can filter them by comparing the gestureRecognizer parameter to your saved objects 
    return YES; // Also, very important. 
} 

- (IBAction)handlePinch:(UIPinchGestureRecognizer *)recognizer { 
    scale=scale*recognizer.scale; 
    mCurrentScale += [recognizer scale] - mLastScale; 
    mLastScale = [recognizer scale]; 
    if (recognizer.state == UIGestureRecognizerStateBegan) 
    { 
     //get midpoint 
     CGPoint zero=[recognizer locationOfTouch:0 inView:self.view]; 
     CGPoint one=[recognizer locationOfTouch:1 inView:self.view]; 
     float x=zero.x+one.x; 
     float y=zero.y+one.y; 
     mid.x=x/2; 
     mid.y=y/2; 
    } 
    else if (recognizer.state == UIGestureRecognizerStateEnded) 
    { 
     mLastScale = 1.0; 
    }  

NSString *xPosString = [NSString stringWithFormat:@"%.2f",mid.x]; 
    NSString *yPosString = [NSString stringWithFormat:@"%.2f",mid.y]; 
    xPosLabel.text=xPosString; 
    yPosLabel.text=yPosString; 
} 

- (IBAction)handlePan:(UIPanGestureRecognizer*)recognizer {  
    [recognizer setMaximumNumberOfTouches:1]; 
    translation= [recognizer translationInView:self.view]; 
    NSString *xPosString = [NSString stringWithFormat:@"%.2f",currentPosition.x]; 
    NSString *yPosString = [NSString stringWithFormat:@"%.2f",currentPosition.y]; 
    xPosLabel.text=xPosString; 
    yPosLabel.text=yPosString; 
    currentPosition.x=currentPosition.x+translation.x; 
    currentPosition.y=currentPosition.y+translation.y; 
    [recognizer setTranslation:CGPointMake(0, 0) inView:self.view]; 
    } 


- (void)drawView:(GLView*)view 
{ 
    glClear(GL_COLOR_BUFFER_BIT); 
    glLoadIdentity(); 
    glTranslatef(mid.x, -mid.y, 0); 
    glScalef(mCurrentScale,mCurrentScale, 0); 
    glTranslatef(-mid.x, mid.y, 0); 
    glTranslatef(currentPosition.x,currentPosition.y*-1,0); 
    [tileManager drawView:view]; 
    //draw calls 
} 
-(void)setupView:(GLView*)view 
{ 
    CGRect rect = view.bounds; 
    glViewport(0, 0,rect.size.width,rect.size.height); 
    glMatrixMode(GL_PROJECTION); 
    glLoadIdentity(); 
    glOrthof(0,(rect.size.width),-(rect.size.height),0, -1, 1) ; 
    glMatrixMode(GL_MODELVIEW); 
    glLoadIdentity();  

    glClearColor(0,1,1, 1); 
    // Enable Smooth Shading, default not really needed. 
    glShadeModel(GL_SMOOTH); 
    // Depth buffer setup. 
    glClearDepthf(1.0f); 


    //enable textures. 
    glEnable(GL_TEXTURE_2D); 
    glHint(GL_PERSPECTIVE_CORRECTION_HINT,GL_FASTEST); 
    glEnable(GL_BLEND); 
    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); 

    [tileManager setupView:view];  
} 

- (void)viewDidLoad 
{ 
[super viewDidLoad]; 
    panRecognizer.delegate=self; 
    pinchRecognizer.delegate=self; 
NSLog(@"pan recognizer delegate [%@]", [panRecognizer.delegate description]); 
} 

- (void)viewDidUnload { 
    [self setPinchRecognizer:nil]; 
    [self setPanRecognizer:nil]; 
    [super viewDidUnload]; 
} 
@end 

一个的NSLog是在委托方法的身体，但永远不会被执行。任何帮助表示赞赏。

article

Answer 1

你可能抓住它现在 - 但似乎你错过在委托的空间：我认为，我们需要看到更多的诊断问题

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizershouldRecognizeSimultaneouslyWithGestureRecognizer 

到

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer 

Answer 2

如果视图控制器从界面生成器加载，则初始化是错误的地方设置的东西了。在-viewDidLoad中执行。