拿了一个简单的tableviewController，每次已启动就崩掉，谁能帮忙看看？在线等待！

[xws103]

UIViewController* rootViewCtrl = [[[UIApplication sharedApplication] keyWindow] rootViewController] ;

NSString *documentsPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) firstObject];

IJKDemoLocalFolderViewController *viewController = [[IJKDemoLocalFolderViewController alloc] initWithFolderPath:documentsPath];

// IJKDemoLocalFolderViewController* fileManagerVc = [[IJKDemoLocalFolderViewController alloc] init];

[rootViewCtrl presentViewController:viewController animated:NO completion:nil];

以上是调用
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/*
* Copyright (C) 2015 Gdier
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

#import "IJKDemoLocalFolderViewController.h"
#import "IJKMoviePlayerViewController.h"

@interface IJKDemoLocalFolderViewController ()

@end

@implementation IJKDemoLocalFolderViewController {
NSString *_folderPath;
NSMutableArray *_subpaths;
NSMutableArray *_files;
}

- (instancetype)initWithFolderPath:(NSString *)folderPath {
self = [super init];
if (self) {
folderPath = [folderPath stringByStandardizingPath];
self.title = [folderPath lastPathComponent];

_folderPath = folderPath;
_subpaths = [NSMutableArray array];
_files = [NSMutableArray array];
}
return self;
}

- (void)viewDidLoad {
[super viewDidLoad];

NSError *error = nil;
BOOL isDirectory = NO;
NSArray *files = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:_folderPath error:&error];

[_subpaths addObject:@".."];

for (NSString *fileName in files) {
NSString *fullFileName = [_folderPath stringByAppendingPathComponent:fileName];

[[NSFileManager defaultManager] fileExistsAtPath:fullFileName isDirectory:&isDirectory];
if (isDirectory) {
[_subpaths addObject:fileName];
} else {
[_files addObject:fileName];
}
}
}

- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}

#pragma mark - Table view data source

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return 2;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
switch (section) {
case 0:
return _subpaths.count;

case 1:
return _files.count;

default:
break;
}

return 0;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"abc"];
if (nil == cell) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"abc"];
cell.textLabel.lineBreakMode = NSLineBreakByTruncatingMiddle;
}

switch (indexPath.section) {
case 0: {
cell.textLabel.text = [NSString stringWithFormat:@"[%@]", _subpaths[indexPath.row]];
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
} break;
case 1: {
cell.textLabel.text = _files[indexPath.row];
cell.accessoryType = UITableViewCellAccessoryNone;
} break;
default:
break;
}

return cell;
}

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
[tableView deselectRowAtIndexPath:indexPath animated:YES];

switch (indexPath.section) {
case 0: {
NSString *fileName = [_folderPath stringByAppendingPathComponent:_subpaths[indexPath.row]];

IJKDemoLocalFolderViewController *viewController = [[IJKDemoLocalFolderViewController alloc] initWithFolderPath:fileName];

[self.navigationController pushViewController:viewController animated:YES];
} break;
case 1: {
NSString *fileName = [_folderPath stringByAppendingPathComponent:_files[indexPath.row]];

fileName = [fileName stringByStandardizingPath];

[IJKVideoViewController presentFromViewController:self withTitle:[NSString stringWithFormat:@"File: %@", fileName] URL:[NSURL fileURLWithPath:fileName] completion:^{
}];

} break;
default:
break;
}
}

/*
// Override to support conditional editing of the table view.
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath {
// Return NO if you do not want the specified item to be editable.
return YES;
}
*/

/*
// Override to support editing the table view.
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
if (editingStyle == UITableViewCellEditingStyleDelete) {
// Delete the row from the data source
[tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationFade];
} else if (editingStyle == UITableViewCellEditingStyleInsert) {
// Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view
}
}
*/

/*
// Override to support rearranging the table view.
- (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)fromIndexPath toIndexPath:(NSIndexPath *)toIndexPath {
}
*/

/*
// Override to support conditional rearranging of the table view.
- (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath {
// Return NO if you do not want the item to be re-orderable.
return YES;
}
*/

/*
#pragma mark - Navigation

// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
// Get the new view controller using [segue destinationViewController].
// Pass the selected object to the new view controller.
}
*/

@end