对于以编程方式创建的UIButton，按钮单击事件有时不会触发
我在故事板中添加了UIScrollView，在滚动视图中我有另一个UIView作为容器视图。在UIScrollView后面我也有一个UIImageView作为兄弟姐妹。这是我的View层次结构。
现在我以编程方式将Views添加到此容器视图中。
-(void)setUI
{
int i;
for ( i=0; i<[array count]; i++) {
NSLog(@"Object at index %i %@",i,[array objectAtIndex:i]);
UIView *view=[self GetAlertView:i];
[self.contentView addSubview:view];
float sizeOfContent = 0;
if (notY+viewParent.frame.size.height>self.contentView.frame.size.height) {
CGRect frame=self.contentView.frame;
frame.size.height=notY;
self.contentView.frame=frame;
}
self.mainScroll.contentSize = self.contentView.frame.size;
}
这是我生成视图的方式。
-(UIView *)GetAlertView :(int)index
{
viewParent=[[UIView alloc] initWithFrame:CGRectMake(10, notY, self.view.frame.size.width-20, 100)];
[viewParent setBackgroundColor:[UIColor clearColor]];
[viewParent setUserInteractionEnabled:YES];
UIImageView *backImage=[[UIImageView alloc] initWithFrame:CGRectMake(0, 0, viewParent.frame.size.width, viewParent.frame.size.height)];
[backImage setImage:[UIImage imageNamed:@"AlertBack"]];
//-------TITLE LABEL--------------
UILabel *lblTitle=[[UILabel alloc] initWithFrame:CGRectMake(20, 20, viewParent.frame.size.width-60, 30)];
[lblTitle setText:[[[array objectAtIndex:index] objectForKey:@"Info"] valueForKey:@"Headline"]];
[lblTitle setFont:[UIFont fontWithName:@"HelveticaNeue-Bold" size:15]];
[lblTitle setTextAlignment:NSTextAlignmentLeft];
[lblTitle setTextColor:[UIColor whiteColor]];
//-------ICON IMAGE------------
UIImageView *imgIco=[[UIImageView alloc] initWithFrame:CGRectMake(lblTitle.frame.origin.x+lblTitle.frame.size.width, 20, 30, 30)];
NSString *imgUrl=[[[[array objectAtIndex:index] objectForKey:@"Info"] objectForKey:@"Resource"] valueForKey:@"Uri"];
if([[array objectAtIndex:index] valueForKey:@"Realimg"]!=nil)
{
[imgIco setImage:[[array objectAtIndex:index] valueForKey:@"Realimg"]];
}
else
{
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
NSURL *imageURL = [NSURL URLWithString:imgUrl];
NSData *imageData = [NSData dataWithContentsOfURL:imageURL];
UIImage *image = [UIImage imageWithData:imageData];
dispatch_async(dispatch_get_main_queue(), ^{
if(image!=nil){
@try {
NSMutableDictionary *objectDict=[[NSMutableDictionary alloc] initWithDictionary:[[array objectAtIndex:index] mutableCopy]];
[objectDict setObject:image forKey:@"Realimg"];
[array replaceObjectAtIndex:index withObject:objectDict];
}
@catch (NSException *exception) {
}
@finally {
}
}
[imgIco setImage:image];
});
});
}
UILabel *lblMessage=[[UILabel alloc] initWithFrame:CGRectMake(20, lblTitle.frame.origin.y+lblTitle.frame.size.height+10, viewParent.frame.size.width-40, 10)];
[lblMessage setUserInteractionEnabled:NO];
[lblMessage setNumberOfLines:0];
CGSize maximumLabelSize = CGSizeMake(viewParent.frame.size.width-40, FLT_MAX);
NSString *strDescript=[[[array objectAtIndex:index] objectForKey:@"Info"]valueForKey:@"Description"];
[lblMessage setText:strDescript];
[lblMessage setFont:[UIFont fontWithName:@"HelveticaNeue" size:14]];
CGSize expectedLabelSize = [strDescript sizeWithFont:lblMessage.font constrainedToSize:maximumLabelSize lineBreakMode:lblMessage.lineBreakMode];
//adjust the label the the new height.
CGRect newFrame = lblMessage.frame;
newFrame.size.height = expectedLabelSize.height;
lblMessage.frame = newFrame;
if (lblMessage.frame.size.height>10) {
float extendedH=lblMessage.frame.size.height-10;
CGRect newFrameMsg = viewParent.frame;
newFrameMsg.size.height = viewParent.frame.size.height+extendedH;
viewParent.frame = newFrameMsg;
CGRect newImgFrame=backImage.frame;
newImgFrame.size.height=backImage.frame.size.height+extendedH;
backImage.frame=newImgFrame;
}
[lblMessage setTextColor:[UIColor whiteColor]];
NSLog(@"Circle %lu",[[[[[array objectAtIndex:index] objectForKey:@"Info"] objectForKey:@"Area"] objectForKey:@"Circle"] count]);
int circleCount=[[[[[array objectAtIndex:index] objectForKey:@"Info"] objectForKey:@"Area"] objectForKey:@"Circle"] count];
NSLog(@"Geocode %@",[[[[array objectAtIndex:index] objectForKey:@"Info"] objectForKey:@"Area"] objectForKey:@"Geocode"]);
NSString *strGeoCod=[[[[array objectAtIndex:index] objectForKey:@"Info"] objectForKey:@"Area"] objectForKey:@"Geocode"];
NSLog(@"Polygon %lu",[[[[[array objectAtIndex:index] objectForKey:@"Info"] objectForKey:@"Area"] objectForKey:@"Polygon"] count]);
int polygonCount=[[[[[array objectAtIndex:index] objectForKey:@"Info"] objectForKey:@"Area"] objectForKey:@"Polygon"] count];
UIImageView *imgEvac;
UIButton *btnEvac;
if (circleCount!=0 || [strGeoCod length]!=0 || polygonCount!=0) {
//----------EVACUATE IMAGE---------------
imgEvac=[[UIImageView alloc] initWithFrame:CGRectMake(20, lblMessage.frame.origin.y+lblMessage.frame.size.height+5, 20, 30)];
[imgEvac setUserInteractionEnabled:NO];
imgEvac.animationImages=[NSArray arrayWithObjects:[UIImage imageNamed:@"Evac1"],
[UIImage imageNamed:@"Evac2"],
[UIImage imageNamed:@"Evac3"],
[UIImage imageNamed:@"Evac4"],
[UIImage imageNamed:@"Evac5"],
[UIImage imageNamed:@"Evac6"],
[UIImage imageNamed:@"Evac7"],
[UIImage imageNamed:@"Evac8"],
[UIImage imageNamed:@"Evac9"],
[UIImage imageNamed:@"Evac10"],
[UIImage imageNamed:@"Evac11"],
[UIImage imageNamed:@"Evac12"],
[UIImage imageNamed:@"Evac13"],
[UIImage imageNamed:@"Evac14"],nil];
imgEvac.animationDuration = 1.0f;
imgEvac.animationRepeatCount = 0;
[imgEvac startAnimating];
//----------EVACUATE BUTTON-------------
btnEvac=[UIButton buttonWithType:UIButtonTypeCustom] ;
[btnEvac setTitle:@"Evacuate" forState:UIControlStateNormal];
[btnEvac setTitleColor:[UIColor greenColor] forState:UIControlStateNormal];
[btnEvac addTarget:self action:@selector(EvacuateClick:) forControlEvents:UIControlEventTouchUpInside];
btnEvac.frame=CGRectMake(imgEvac.frame.origin.x+imgEvac.frame.size.width+5, lblMessage.frame.origin.y+lblMessage.frame.size.height+5, 75, 30);
intlbldateX=btnEvac.frame.origin.x+btnEvac.frame.size.width;
}
else
{
intlbldateX=20;
}
//----------DATE LABEL------------------
UILabel *lblDate=[[UILabel alloc] initWithFrame:CGRectMake(intlbldateX, lblMessage.frame.origin.y+lblMessage.frame.size.height+5, viewParent.frame.size.width-(intlbldateX+10), 30)];
[lblDate setUserInteractionEnabled:NO];
[lblDate setBackgroundColor:[UIColor redColor]];
[lblDate setText:[[array objectAtIndex:index]valueForKey:@"Sent"]];
[lblDate setFont:[UIFont fontWithName:@"HelveticaNeue-Bold" size:15]];
[lblDate setTextAlignment:NSTextAlignmentRight];
[lblDate setTextColor:[UIColor whiteColor]];
CGRect newFrame2=viewParent.frame;
newFrame2.size.height=viewParent.frame.size.height+10;
viewParent.frame=newFrame2;
CGRect newImgFrame2=backImage.frame;
newImgFrame2.size.height=backImage.frame.size.height+10;
backImage.frame=newImgFrame2;
// --------- VERTICLE LINE --------------
UIView *vwVerticle=[[UIView alloc] initWithFrame:CGRectMake(0, 0, 10, viewParent.frame.size.height)];
[vwVerticle setUserInteractionEnabled:NO];
[vwVerticle setBackgroundColor:[self colorWithHexString:[[[[[array objectAtIndex:index]objectForKey:@"Info"] objectForKey:@"Resource"] valueForKey:@"ColorCode"] stringByReplacingOccurrencesOfString:@"#" withString:@""]]];
[viewParent addSubview:backImage];
[viewParent addSubview:lblTitle];
[viewParent addSubview:imgIco];
[viewParent addSubview:lblMessage];
[viewParent addSubview:imgEvac];
[viewParent addSubview:lblDate];
[viewParent addSubview:vwVerticle];
[viewParent addSubview:btnEvac];
notY=viewParent.frame.origin.y+viewParent.frame.size.height+20;
return viewParent;
}
但我的问题是btnEvac无法点击。但有时我只能点击一次。这是我的按钮点击事件。
-(IBAction)EvacuateClick :(UIButton *)sender
{
NSLog(@"Evacuate clicked");
}
有时这是第一次开火。之后没有任何反应。我不知道是什么原因。我已经将用户交互启用= YES设置为我的滚动视图和容器视图。但不是飞溅图像视图。我希望我也不想这样做。请帮帮我。
由于
这就是我将更多视图加载到底部的方式
- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView {
float bottomEdge = self.mainScroll.contentOffset.y + self.mainScroll.frame.size.height;
if (bottomEdge >= self.mainScroll.contentSize.height) {
// we are at the end
//[self performSelectorInBackground:@selector(callscrol) withObject:nil];
[self callscrol];
}
}
-(void)callscrol
{
if(!loading&& !resNull)
{
float offs = (self.mainScroll.contentOffset.y+self.mainScroll.bounds.size.height);
float val = (self.mainScroll.contentSize.height);
if (offs==val)
{
loading=YES;
start_rec+=1;
[self performSelectorInBackground:@selector(LoadData) withObject:nil];
}
}
}
从服务器获取更多数据
-(void)LoadData
{
[self.actind startAnimating];
[self.actind setHidden:NO];
loading=YES;
NSString *serverURL = [[[NSBundle mainBundle] infoDictionary] objectForKey:@"BaseURL"];
NSString *queryString=[NSString stringWithFormat:@"GetDisasterAlertsJson?authCode=%@&lastUpdated=%@&version=%@&langId=%@&pageNo=%@&noOfMessages=%@",dm.strAuthCode,lastUpdate,@"1.0",@"1",[NSString stringWithFormat:@"%i",start_rec],@"5"];
NSString *urlString=[NSString stringWithFormat:@"%@%@",serverURL,queryString];
// Create the request.
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:urlString]];
// Create url connection and fire request
[NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {
if (!data) {
NSLog(@"%s: sendAynchronousRequest error: %@", __FUNCTION__, connectionError);
return;
} else if ([response isKindOfClass:[NSHTTPURLResponse class]]) {
NSInteger statusCode = [(NSHTTPURLResponse *)response statusCode];
if (statusCode != 200) {
NSLog(@"%s: sendAsynchronousRequest status code != 200: response = %@", __FUNCTION__, response);
return;
}
}
NSError *parseError = nil;
NSData *dataXMLRemoved=[self ReplaceXMLData:data];
NSLog(@"======= Data XML Removed ======== %@",dataXMLRemoved);
dictionary = [NSJSONSerialization JSONObjectWithData:dataXMLRemoved options:NSJSONReadingAllowFragments error:&parseError];
if (!dictionary) {
NSLog(@"%s: JSONObjectWithData error: %@; data = %@", __FUNCTION__, parseError, [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]);
resNull=NO;
return;
}
// now you can use your `dictionary` object
else
{
NSLog(@"JSON Dictionary================ %@",dictionary);
array=[dictionary objectForKey:@"Cmessage"];
NSLog(@"Array ####### %@",array);
resNull=NO;
loading=NO;
[self.actind stopAnimating];
[self.actind setHidden:YES];
[self setUI];
}
}];
}
1 个答案:
答案 0 :(得分：0)
我不确定这是不是你的问题，但默认情况下UIScrollViews延迟触发从过滤到嵌入视图的滚动性能。这可能会使按钮在每次触发事件触发嵌入视图时只需要大约一秒钟就不会被触发。
尝试在滚动视图中关闭此设置。
self.mainScroll.delaysContentTouches = NO;
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