'-[__ NSDictionaryI length]:无法识别的选择器已发送到实例'-试图找出原因 [英] '-[__NSDictionaryI length]: unrecognized selector sent to instance' - trying to figure out why
本文介绍了'-[__ NSDictionaryI length]:无法识别的选择器已发送到实例'-试图找出原因的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我有一个UITableView，其标题带有自定义UILabel，而另一个则带有副标题，以便将文本向右对齐.
I've a UITableView with custom UILabel for title and one another to subtitle, in order to align the text to right.
我的数据来自Web服务，我将其解析并存储在NSDictionary的NSArray中.
某些标题或副标题可以是nil/empty-text.
为此，我将其放在try/catch中.
My data come from web service, which I parse and store in NSArray of NSDictionary.
Some of the title or the subtitle can be nil/empty-text.
For this I'm putting it in try/catch.
表中的一行使我的应用程序崩溃，我不知道为什么.
One of the lines in my table making my app crush and I cannot figure out why.
我认为其中一个(标题/字幕)返回为NSDictionary，但是我为我的对象([UILabel text])的类做了日志打印，看来一切正常.
I think one of them (title/subtitle) return as NSDictionary but I made a log print for class for my objects, for my [UILabel text], seems like everything is ok.
异常和堆栈跟踪:
2014-04-29 10:47:55.985 Cellular Radar[3226:60b] -[__NSDictionaryI length]: unrecognized selector sent to instance 0x16d007f0
2014-04-29 10:47:55.993 Cellular Radar[3226:60b] -[Home tableView:willDisplayCell:forRowAtIndexPath:], exception.reason: -[__NSDictionaryI length]: unrecognized selector sent to instance 0x16d007f0
2014-04-29 10:47:55.999 Cellular Radar[3226:60b] -[__NSDictionaryI length]: unrecognized selector sent to instance 0x16d007f0
2014-04-29 10:47:56.006 Cellular Radar[3226:60b] CRASH:
-[__NSDictionaryI length]: unrecognized selector sent to instance 0x16d007f0
2014-04-29 10:47:56.062 Cellular Radar[3226:60b] Stack Trace:
(
0 CoreFoundation 0x30e02feb <redacted> + 154
1 libobjc.A.dylib 0x3b5b1ccf objc_exception_throw + 38
2 CoreFoundation 0x30e06967 <redacted> + 202
3 CoreFoundation 0x30e05253 <redacted> + 706
4 CoreFoundation 0x30d547b8 _CF_forwarding_prep_0 + 24
5 UIKit 0x33637ed3 <redacted> + 38
6 UIKit 0x337595bb <redacted> + 3682
7 UIKit 0x33758031 <redacted> + 60
8 UIKit 0x3361ed79 <redacted> + 380
9 QuartzCore 0x3329c62b <redacted> + 142
10 QuartzCore 0x33297e3b <redacted> + 350
11 QuartzCore 0x33297ccd <redacted> + 16
12 QuartzCore 0x332976df <redacted> + 230
13 QuartzCore 0x332974ef <redacted> + 314
14 QuartzCore 0x332eac49 <redacted> + 516
15 IOMobileFramebuffer 0x3606375d <redacted> + 104
16 IOKit 0x31aed451 IODispatchCalloutFromCFMessage + 248
17 CoreFoundation 0x30dc2ef9 <redacted> + 136
18 CoreFoundation 0x30dcdab7 <redacted> + 34
19 CoreFoundation 0x30dcda53 <redacted> + 346
20 CoreFoundation 0x30dcc227 <redacted> + 1398
21 CoreFoundation 0x30d36f0f CFRunLoopRunSpecific + 522
22 CoreFoundation 0x30d36cf3 CFRunLoopRunInMode + 106
23 GraphicsServices 0x35c3b663 GSEventRunModal + 138
24 UIKit 0x3368216d UIApplicationMain + 1136
25 Cellular Radar 0x00077757 main + 70
26 libdyld.dylib 0x3babeab7 <redacted> + 2
)
2014-04-29 10:47:56.075 Cellular Radar[3226:60b] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSDictionaryI length]: unrecognized selector sent to instance 0x16d007f0'
*** First throw call stack:
(0x30e02fd3 0x3b5b1ccf 0x30e06967 0x30e05253 0x30d547b8 0x33637ed3 0x337595bb 0x33758031 0x3361ed79 0x3329c62b 0x33297e3b 0x33297ccd 0x332976df 0x332974ef 0x332eac49 0x3606375d 0x31aed451 0x30dc2ef9 0x30dcdab7 0x30dcda53 0x30dcc227 0x30d36f0f 0x30d36cf3 0x35c3b663 0x3368216d 0x77757 0x3babeab7)
libc++abi.dylib: terminating with uncaught exception of type NSException
相关代码:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];
if (cell == nil)
{
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];
}
tableView.separatorStyle = UITableViewCellSeparatorStyleSingleLine;
tableView.separatorColor = [UIColor lightGrayColor];
UILabel *textLabel = (UILabel*)[cell viewWithTag:kTAG_TITLE];
UILabel *detailTextLabel = (UILabel*)[cell viewWithTag:kTAG_SUBTITLE];
UIImageView *imageView = (UIImageView*)[cell viewWithTag:kTAG_IMAGE];
textLabel.frame = CGRectMake(
textLabel.frame.origin.x,
textLabel.frame.origin.y - 10,
textLabel.frame.size.width,
textLabel.frame.size.height
);
cell.textLabel.frame = textLabel.frame;
cell.tag = indexPath.row;
cell.backgroundColor = [UIColor whiteColor];
cell.textLabel.font = cell.detailTextLabel.font = [UIFont fontWithName:kFONT_NAME size:kFONT_SIZE];
imageView.layer.cornerRadius = 10.0;
imageView.layer.borderColor = (__bridge CGColorRef)([UIColor clearColor]);
imageView.layer.borderWidth = 0;
imageView.clipsToBounds = YES;
imageView.contentMode = UIViewContentModeScaleAspectFill;
textLabel.text = @"";
textLabel.textColor = [UIColor darkGrayColor];
textLabel.backgroundColor = [UIColor clearColor];
textLabel.textAlignment = NSTextAlignmentRight;
textLabel.font = [UIFont fontWithName:kFONT_NAME size:kFONT_SIZE];
textLabel.textColor = [UIColor darkGrayColor];
detailTextLabel.text = @"";
detailTextLabel.font = [UIFont fontWithName:kFONT_NAME size:kFONT_SIZE];
detailTextLabel.backgroundColor = [UIColor clearColor];
detailTextLabel.textAlignment = NSTextAlignmentRight;
detailTextLabel.textColor = [UIColor darkGrayColor];
if (self.arrayGlobal.count > 0)
{
NSDictionary *dict = self.arrayGlobal[indexPath.row];
NSString *imageUrl = dict[@"imageUrl"];
@try
{
cell.textLabel.text = dict[@"Title"];
}
@catch (NSException *exception)
{
NSLog(@"%s, %@", __PRETTY_FUNCTION__, exception.reason);
cell.textLabel.text = @"";
}
@try
{
detailTextLabel.text = dict[@"Text"];
}
@catch (NSException *exception)
{
detailTextLabel.text = @"";
}
if (imageUrl.length > 0)
{
NSString *completeURL = @"";
completeURL = [completeURL stringByAppendingString:kPROFILE_IMAGE_URL];
completeURL = [completeURL stringByAppendingString:@"/2/"];
completeURL = [completeURL stringByAppendingString:imageUrl];
completeURL = [completeURL stringByAppendingString:@".png"];
NSString *fileName = [NSString stringWithFormat:@"%@.png", imageUrl];
NSString* path = GetMediaFolder();
BOOL imageExists = [[NSFileManager defaultManager] fileExistsAtPath:[path stringByAppendingPathComponent:fileName]];
if (imageExists)
{
dispatch_async(dispatch_get_main_queue(), ^{
UITableViewCell *updateCell = (id)[tableView cellForRowAtIndexPath:indexPath];
UIImageView *imageView = (UIImageView*)[updateCell viewWithTag:kTAG_IMAGE];
imageView.image=[UIImage imageWithContentsOfFile:[path stringByAppendingPathComponent:fileName]];
imageView.layer.cornerRadius = 23.0;
imageView.layer.borderColor = (__bridge CGColorRef)([UIColor clearColor]);
imageView.layer.borderWidth = 1.0;
imageView.clipsToBounds = YES;
imageView.contentMode = UIViewContentModeScaleAspectFill;
[updateCell setNeedsLayout];
});
}
else
{
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
NSURL *imageURL=[NSURL URLWithString:completeURL];
NSData *image=[NSData dataWithContentsOfURL:imageURL];
[image writeToFile:[path stringByAppendingPathComponent:fileName] atomically:YES];
// Update UI
dispatch_async(dispatch_get_main_queue(), ^{
UITableViewCell *updateCell = (id)[tableView cellForRowAtIndexPath:indexPath];
UIImageView *imageView = (UIImageView*)[updateCell viewWithTag:kTAG_IMAGE];
imageView.image=[UIImage imageWithContentsOfFile:[path stringByAppendingPathComponent:fileName]];
imageView.layer.cornerRadius = 23.0;
imageView.layer.borderColor = (__bridge CGColorRef)([UIColor clearColor]);
imageView.layer.borderWidth = 1.0;
imageView.clipsToBounds = YES;
imageView.contentMode = UIViewContentModeScaleAspectFill;
[updateCell setNeedsLayout];
});
});
}
}
}
return cell;
}
- (void) tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath
{
NSLog(@"4");
@try {
cell = [Netroads willDisplayFlatDesignCell:cell];
}
@catch (NSException *exception) {
NSLog(@"%s, exception.reason: %@", __PRETTY_FUNCTION__, exception.reason);
}
}
+ (UITableViewCell*)willDisplayFlatDesignCell:(UITableViewCell*)cell
{
UILabel *label = [[UILabel alloc] initWithFrame:cell.frame];
label.backgroundColor = [UIColor colorWithRed:200.0/255.0 green:200.0/255.0 blue:200.0/255.0 alpha:1]; // light gray color, native iphone
cell.selectedBackgroundView = label;
cell.textLabel.backgroundColor = [UIColor clearColor];
cell.textLabel.textAlignment = NSTextAlignmentRight;
cell.textLabel.textColor = [UIColor darkGrayColor];
if (cell.detailTextLabel.text) {
cell.detailTextLabel.backgroundColor = [UIColor clearColor];
cell.detailTextLabel.textAlignment = NSTextAlignmentRight;
cell.detailTextLabel.textColor = [UIColor darkGrayColor];
}
return cell;
}
编辑-1:
我为NSDictionary记录了一个日志，正如@sleepwalkerfx所指出的那样，我那行的暗恋结果是:
I made a log for my NSDictionary as @sleepwalkerfx pointed out and the result for my row that crush is:
2014-04-29 12:01:15.182 Cellular Radar[3331:60b] {
Date = "22/01/14";
Owner = "\U05de\U05e2\U05e8\U05db\U05ea";
Text = {
};
Time = "09:27";
Title = {
};
WallID = 1;
imageUrl = system;
}
这让我认为那些对象(文本，标题)如何像[NSString class]一样通过检查?
Which makes me think that how can those objects (text, title) pass the check as [NSString class]?
推荐答案
您正在将单元格的text属性设置为字典:
You are setting the cell's text property to a dictionary:
cell.textLabel.text = dict[@"Title"];
从您的dict日志中:
Title = {
};
和:
detailTextLabel.text = dict[@"Text"];
从您的dict日志中:
Text = {
};
目前尚不清楚dict应该使用什么值，但不应该是那些字典.
It's not clear exactly what values should be used from dict, but it should not be those dictionaries.
这篇关于'-[__ NSDictionaryI length]:无法识别的选择器已发送到实例'-试图找出原因的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
查看全文
