iOS频繁打开相册崩溃: ALAssetsLibrary error - “Too many contexts. No space in contextList.”

iOS频繁打开相册崩溃: ALAssetsLibrary error - “Too many contexts. No space in contextList.”
http://stackoverflow.com/questions/13480611/has-anyone-experienced-crashes-when-using-alassetslibrary-in-a-background-thread
原因:

因为频繁的调用

[[ALAssetsLibrary alloc] init]

即使你相册关闭, 但如果频繁调用这句话, 在ARC方式下, 估计iOS也没有及时清空内存,

就会导致 “Too many contexts. No space in contextList.”

因此, 解决方式就是使用单例调用.

+ (ALAssetsLibrary *) defaultAssetsLibrary
{
static dispatch_once_t pred = 0;
static ALAssetsLibrary *library = nil;
dispatch_once(&pred, ^{
library = [[ALAssetsLibrary alloc] init];
});
return library;
}

　

　或者我用了 DBCamera 库, 它已经提供了一个方法, 直接用也行.

ALAssetsLibrary *sharedLibrary = [[DBLibraryManager sharedInstance] defaultAssetsLibrary];
[sharedLibrary enumerateGroupsWithTypes:ALAssetsGroupAll
usingBlock:^(ALAssetsGroup *group, BOOL *stop)
{
if (group)
{
NSString *nameStr = [group valueForProperty:ALAssetsGroupPropertyName];

}
failureBlock:^(NSError *error)
{
NSLog(@"failureBlock");
}];

　　

测试后已经不那么容易崩溃了.