[英]UITapGestureRecognizer not working when added for UIView Cannot detect the issue
為UIView
添加UITapGestureRecognizer
無效。 無法檢測到問題。
注意:我不在ViewDidLoad
使用它。 請幫助我解決問題。 提前致謝。
-(void)setSegmentValues:(NSArray *) values
{
UITapGestureRecognizer *tap1 = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapDetected:)];
tap1.numberOfTapsRequired = 1;
tap1.delegate=self;
[val1 addGestureRecognizer:tap1];
val1 = [[UIView alloc]initWithFrame:CGRectMake(40, 200, 70, 40)];
val1.backgroundColor = [UIColor magentaColor];
label1 = [[UILabel alloc]initWithFrame:CGRectMake(0, 0,70, 40)];
label1.backgroundColor = [UIColor yellowColor];
label1.text = [values objectAtIndex:0];
label1.textAlignment = UITextAlignmentCenter;
val1.userInteractionEnabled=YES;
[val1 addGestureRecognizer:tap1];
[val1 addSubview:label1];
[self addSubview:val1];
}
其他東西:
- (void)tapDetected:(UITapGestureRecognizer *)tapRecognizer
{
NSLog(@"success1");
}
-(BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch
{
return YES;
}
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
{
return YES;
}
注意:我還添加了UIGestureRecognizerDelegate
。
就是這樣..您將獲得正確的解決方案..
-(void)setSegmentValues:(NSArray *)values bgColor:(UIColor *)color
{
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(selectedIndexValue:)];
tap.numberOfTapsRequired = 1;
tap.numberOfTouchesRequired = 1;
viewOne = [[UIView alloc]initWithFrame:CGRectMake(40, 50, 80, 60)];
viewOne.backgroundColor = color;
viewOne.tag = 0;
UILabel *lblOne = [[UILabel alloc]initWithFrame:CGRectMake(0, 0, 80, 60)];
lblOne.text = [values objectAtIndex:0];
lblOne.textAlignment = UITextAlignmentCenter;
lblOne.backgroundColor = [UIColor clearColor];
[viewOne addSubview:lblOne];
viewOne.userInteractionEnabled = YES;
[viewOne addGestureRecognizer:tap];
[self addSubview:viewOne];
}
-(void)selectedIndexValue:(UIGestureRecognizer *)gesture
{
int myViewTag = gesture.view.tag;
if (myViewTag == 0)
{
selectedIndex1 = 0;
self.lblValue.text = [valueArray objectAtIndex:myViewTag];
viewOne.backgroundColor = [UIColor colorWithRed:57.0f green:122.0f blue:255.0f alpha:1.0f];
viewTwo.backgroundColor = viewColor;
viewThree.backgroundColor = viewColor;
}
[self sendActionsForControlEvents:UIControlEventValueChanged];
}
您是否甚至控制“ setSegmentValues:”方法? 確保從viewDidLoad或viewWillAppear或任何IBAction中調用您的方法。
這是錯誤的:
[val1 addGestureRecognizer:tap1];
val1 = [[UIView alloc]initWithFrame:CGRectMake(40, 200, 70, 40)];
寫:
val1 = [[UIView alloc]initWithFrame:CGRectMake(40, 200, 70, 40)];
[val1 addGestureRecognizer:tap1];
您將手勢添加到了沒有alloc init的UiView。 在向其添加手勢之前初始化視圖
請使用此代碼
-(void)setSegmentValues:(NSArray *) values
{
val1 = [[UIView alloc]initWithFrame:CGRectMake(40, 200, 70, 40)];
UITapGestureRecognizer *tap1 = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapDetected:)];
tap1.numberOfTapsRequired = 1;
tap1.delegate=self;
[val1 addGestureRecognizer:tap1];
val1.backgroundColor = [UIColor magentaColor];
label1 = [[UILabel alloc]initWithFrame:CGRectMake(0, 0,70, 40)];
label1.backgroundColor = [UIColor yellowColor];
label1.text = [values objectAtIndex:0];
label1.textAlignment = UITextAlignmentCenter;
val1.userInteractionEnabled=YES;
[val1 addGestureRecognizer:tap1];
[val1 addSubview:label1];
[self addSubview:val1]
}
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