當滿足某些條件時檢測LongPress

Question

我在我的收藏視圖中使用UILongPressGestureRecognizer，我希望長按手勢識別器只有在滿足某些條件時才應起作用。

NSString *check; 
if([check isEqualToString:@"Enabled"] 
{ 
    //long press should be detected. or following method should be called 
} 

-(void)handleLongPressGesture:(UILongPressGestureRecognizer *)gestureRecognizer 

{ 
} 

Answer 1

添加UIGestureRecognizerDelegate

- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer{ 

    NSString *check; 
    if([check isEqualToString:@"Enabled"] 
    { 
     //long press should be detected. or following method should be called 
     return YES; 
    }else{ 
     return NO; 
    } 
} 

Answer 2

NSString *check; 
UILongPressGestureRecognizer *longPress =[ [UILongPressGestureRecognizer alloc]init]; 

if([check isEqualToString:@"Enabled"] 
{ 
UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc] 
             initWithTarget:self 
             action:@selector(handleLongPressGesture:)]; 
}else{ 

} 

-(void)handleLongPressGesture:(UILongPressGestureRecognizer *)gestureRecognizer 

{ 

}