大约有 2,196 项符合查询结果（耗时：0.0129秒） [XML]
How can I load storyboard programmatically from class?
...b files in storyboard. So I was looking a way to do it in code, like with alloc, init, push for viewControllers. In my case I have only one controller in storyboard: UITableViewController , which has static cells with some content I want to show. If anyone knows proper way to work both with xib a...
NSPredicate: filtering objects by day of NSDate property
...t;= %@)", startDate, endDate];
NSFetchRequest *request = [[[NSFetchRequest alloc] init] autorelease];
[request setEntity:[NSEntityDescription entityForName:@"EntityName" inManagedObjectContext:moc]];
[request setPredicate:predicate];
NSError *error = nil;
NSArray *results = [moc executeFetchRequest...
C++ deprecated conversion from string constant to 'char*'
...lution 2:
char *x = (char *)"foo bar";
Solution 3:
char* x = (char*) malloc(strlen("foo bar")+1); // +1 for the terminator
strcpy(x,"foo bar");
Arrays also can be used instead of pointers because an array is already a constant pointer.
...
How to empty a list in C#?
...end up using = new LisT<T>(); due to the fact that it clears all old allocations instantly. For most people though, .Clear(); will suffice, but if you find a list acting strangely - try using = new List<T>();.
– Charles
Jul 3 '14 at 3:28
...
Why historically do people use 255 not 256 for database field magnitudes?
...nagement likes powers of 2. see: stackoverflow.com/questions/3190146/… Allocating char foo[257] will either fragment memory or take up 512 bytes.
– ebyrob
Jan 26 '17 at 17:11
4...
How can I create a UILabel with strikethrough text?
...
NSMutableAttributedString *attributeString = [[NSMutableAttributedString alloc] initWithString:@"Your String here"];
[attributeString addAttribute:NSStrikethroughStyleAttributeName
value:@2
range:NSMakeRange(0, [attributeString length])];
Swift
le...
How do I make a UITableViewCell appear disabled?
...:CellIdentifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
}
// Configure the cell...
if(indexPath.row==0)
{
cell.userInteractionEnabled=FALSE;
UIImageVi...
Java dynamic array sizes?
...
No you can't change the size of an array once created. You either have to allocate it bigger than you think you'll need or accept the overhead of having to reallocate it needs to grow in size. When it does you'll have to allocate a new one and copy the data from the old to the new:
int[] oldItems ...
Why would I ever use push_back instead of emplace_back?
... the destructor will attempt to call delete on that pointer, which was not allocated by new because it is just a stack object. This leads to undefined behavior.
This is not just invented code. This was a real production bug I encountered. The code was std::vector<T *>, but it owned the conten...
Label Alignment in iOS 6 - UITextAlignment deprecated
...fine ALIGN_CENTER UITextAlignmentCenter
#endif
UILabel* label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 50, 30)];
label.text = @"There is no spoon";
label.textAlignment = ALIGN_CENTER;
[self addSubview:label];
shar...