獲得UIView響應快速，快速單擊的最佳方式是什麼？

Question

我有一個觀點，我想讓用戶能夠快速切換。我曾嘗試使用UITapGestureRecognizer，但它並沒有像我想的那樣很好地拾取水龍頭。我還有其他方法可以嘗試嗎？

謝謝！

Answer 1

您可以創建自己的UIView派生類，並將其作爲您用於直接獲取「觸摸」輸入的任何視圖的子視圖插入。我用它作爲屏幕上的疊加層，以便我可以觸發屏幕更改，動畫，「我正在查看此輸入機制」等。

此方法使用UIView的touchesEnded覆蓋（請參閱代碼），而不是UITapGestureRecognizer。這是「舊學校」的目標-C並且不使用ARC。

這裏是頭文件 「TapView.h」

#import <UIKit/UIKit.h> 


@interface TapView : UIView 
{ 
    SEL touchedCallback; 
    id touchedCallbackTarget; 
    UILabel* label; 
} 

@property(nonatomic,assign) SEL touchedCallback; 
@property(nonatomic,retain) id touchedCallbackTarget; 
@property(nonatomic,retain) UILabel* label; 

-(void)respondToTap:(SEL)withCallback andTarget:(id)target; 

@end 

創建類，並調用[tapView respondToTap ....]與你的目標進行初始化。像這樣的東西（在viewDidLoad中）：

- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 
    UIView* navView = [ViewUtilities SetNavigationTitle:@"Thing Tank" andSubtitle:@"Tap Here To Empty Tank" forView:self]; 
    CGRect frame = navView.frame; 
    CGRect tapFrame = CGRectMake(0, 0, frame.size.width, frame.size.height); 
    TapView* tapView = [[[TapView alloc] initWithFrame:tapFrame] autorelease]; 
    [navView addSubview:tapView]; 
    [tapView respondToTap:@selector(tapNavBar) andTarget:self]; 
    self._tapView = tapView; 
} 

此代碼是用來允許用戶「復位」一個「東西坦克」（認爲魚缸），在應用程序我寫的爲iPhone稱爲六件事情（you can find it here）。

這裏是選擇器功能（不帶參數）：

-(void)tapNavBar 
{ 
    [[NSNotificationCenter defaultCenter] postNotificationName:[Constants NOTIFICATION_RESTART_BACKGROUND] object:nil];    
} 

這裏是實施，TapView.m。

#import "TapView.h" 


@implementation TapView 

@synthesize touchedCallback; 
@synthesize touchedCallbackTarget; 
@synthesize label; 

-(TapView*)initWithFrame:(CGRect)frame 
{ 
    self = [super initWithFrame:frame]; 
    if(self) 
    { 
     self.touchedCallback = nil; 
     self.userInteractionEnabled = YES; 

     UILabel *lbl = [[UILabel alloc] init]; 
     lbl.frame = CGRectMake(0, 0, frame.size.width, frame.size.height); 
     lbl.backgroundColor = [UIColor clearColor]; 
     lbl.textColor = [UIColor whiteColor]; 
     lbl.textAlignment = UITextAlignmentCenter; 
     lbl.font = [UIFont boldSystemFontOfSize:16]; 
     lbl.text = nil; 
     lbl.adjustsFontSizeToFitWidth = YES; 
     self.label = lbl; 
     [self addSubview:lbl]; 
     [lbl release]; 
    } 
    return self; 
} 


/* 
// Only override drawRect: if you perform custom drawing. 
// An empty implementation adversely affects performance during animation. 
- (void)drawRect:(CGRect)rect { 
    // Drawing code. 
} 
*/ 

-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event 
{ 
    if(self.touchedCallback != nil && self.touchedCallback != nil) 
     [self.touchedCallbackTarget performSelector:self.touchedCallback]; 
} 

-(void)respondToTap:(SEL)withCallback andTarget:(id)target 
{ 
    self.touchedCallback = withCallback; 
    self.touchedCallbackTarget = target; 
} 


- (void)dealloc 
{ 
    self.label = nil; 
    [super dealloc]; 
} 


@end 

對您有幫助嗎？