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[英]Xcode 9.0 Swift 04 (Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Only run on the main thread!')
[英]'NSInternalInconsistencyException', reason: 'Only run on the main thread!' error
所以我知道这个错误的原因,但我不确定如何绕过它。
我有一个TextField
,我想不能编辑,但在视图中启用滚动。
这是我设置该视图的方式:
- (void)tableView:(UITableView *) tableView
didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
NSDictionary *component = self.resultsTuples[indexPath.row];
NSString* serverUrl = @"http://staging.toovia.com";
NSString* pageLink = component[@"$element"][@"ContactCard"][@"PageLink"];
NSString* recUrl =[NSString stringWithFormat:@"%@%@&format=json&fields=summary&fields=session_info", serverUrl,pageLink];
[AJAXUtils getAsyncJsonWithUrl:(NSURL *)[NSURL URLWithString:recUrl] callback:^(NSDictionary *returnjson){
if (returnjson != nil){
NSLog(@"RETURN JSON : %@", returnjson);
NSString *userPageLink = returnjson[@"Node"][@"SessionInfo"][@"PostingAs"][@"Key"];
self.detailController.userPageLink = userPageLink;
self.detailController.nodePage = returnjson[@"Node"][@"Key"];
NSString *selectedCard = component[@"$element"][@"Title"];
// [self.detailController setDescription:component[@"element"][@"ContactCard"][@"Description"]];
[self.detailController setPageTitle:selectedCard];
NSString* photoUrl = component[@"$element"][@"ContactCard"][@"Cover"][@"Medium"][@"Link"];
[self.detailController setRestaurantImage:[UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:photoUrl]]]];
self.detailController.title = selectedCard;
NSString* rating = component[@"$element"][@"Summary"][@"AverageRating"];
self.detailController.rating =(NSInteger)rating;
[self.navigationController pushViewController:self.detailController animated:YES];
}
}];
这是视图的viewWillAppear
代码:
-(void)viewWillAppear:(BOOL)animated{
[super viewWillAppear: animated];
self.rateView.notSelectedStar =[UIImage imageNamed:@"star-off.png"];
self.rateView.fullSelectedStar = [UIImage imageNamed:@"star-on.png"];
self.rateView.rating = self.rating;
self.rateView.editable = YES;
self.rateView.maxRating = 5;
self.rateView.delegate = self;
_pageTitleLabel.text = _pageTitle;
_pageScoreLabel.text = _pageScore;
_trendingImageView.image = [UIImage imageNamed:@"trending.png"];
_restaurantImageView.image = _restaurantImage;
}
完整的错误是 -
2013-12-16 01:22:50.362 ReviewApp[7332:441f] *** Assertion failure in void _UIPerformResizeOfTextViewForTextContainer(NSLayoutManager *, UIView<NSTextContainerView> *, NSTextContainer *, NSUInteger)(), /SourceCache/UIFoundation_Sim/UIFoundation-258.1/UIFoundation/TextSystem/NSLayoutManager_Private.m:1510
2013-12-16 01:22:50.365 ReviewApp[7332:441f] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Only run on the main thread!'
所以我猜它正在发生,因为文本字段的大小调整(当设置内容时)必须在主线程上发生。 如何强制这种情况发生/抑制此错误? 我不能控制文本字段调整大小吗?
谢谢
我猜测来自AJAXUtils
的回调发生在后台线程上。 我不知道这是不是你的代码,但你应该在主线程上做所有的UI操作(比如在标签中设置文本,在图像视图中设置图像,推动视图控制器)。
dispatch_sync(dispatch_get_main_queue(), ^{
/* Do UI work here */
});
Swift 3.0版
DispatchQueue.main.async(execute: {
/* Do UI work here */
})
您必须始终在主线程上执行UI代码。 你不是,因此错误。 尝试这个:
[AJAXUtils getAsyncJsonWithUrl:(NSURL *)[NSURL URLWithString:recUrl] callback:^(NSDictionary *returnjson){
if (returnjson != nil){
NSLog(@"RETURN JSON : %@", returnjson);
NSString *userPageLink = returnjson[@"Node"][@"SessionInfo"][@"PostingAs"][@"Key"];
self.detailController.userPageLink = userPageLink;
self.detailController.nodePage = returnjson[@"Node"][@"Key"];
NSString *selectedCard = component[@"$element"][@"Title"];
// [self.detailController setDescription:component[@"element"][@"ContactCard"][@"Description"]];
[self.detailController setPageTitle:selectedCard];
NSString* photoUrl = component[@"$element"][@"ContactCard"][@"Cover"][@"Medium"][@"Link"];
[self.detailController setRestaurantImage:[UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:photoUrl]]]];
self.detailController.title = selectedCard;
NSString* rating = component[@"$element"][@"Summary"][@"AverageRating"];
self.detailController.rating =(NSInteger)rating;
dispatch_async(dispatch_get_main_queue(), ^{
[self.navigationController pushViewController:self.detailController animated:YES];
});
}
}];
这可确保视图控制器的显示位于主线程上。 实际上,您可能需要在调用dispatch_async
更多代码。
Swift版本
dispatch_async(dispatch_get_main_queue()){
/* Do UI work here */
}
而且,这不是一个在didSelectRow中做事的好方法。 你应该有一个网络层,将网络代码与视图控制器分开,否则你将得到巨大的视图控制器,代码将无法测试。
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