所以,我有一个自定义类“BackupIncrement”,它从sqlite3数据库中获取数据,并且运行正常。我还有NSPopUpButton
名为“pubDefaultIncrement”的IB
。
最终结果是,我希望popupbutton
填充有意义的标题,并且每个menuitem
或值都是数据库中的增量ID(主键)。
以下是相关代码:
- (void)doAddItemsTopubDefaultBackupIncrement {
marBackupIncrement = [[NSMutableArray alloc] init];
pubDefaultIncrement = [[NSPopUpButton alloc] init];
[pubDefaultIncrement removeAllItems];
mnuBackupIncrement = [[NSMenu alloc] init];
const char* chrSQLSelect = "SELECT * FROM _backup_increments";
sqlite3_stmt* compiledSQL;
if (sqlite3_prepare_v2(claAppDelegate.sl3Database, chrSQLSelect, -1, &compiledSQL, NULL) == SQLITE_OK) {
while (sqlite3_step(compiledSQL) == SQLITE_ROW) {
BackupIncrement* bi = [[BackupIncrement alloc]
initWithintIncrementId:[NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledSQL, 0)]
AndstrIncrementValue:[NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledSQL, 1)]
AndstrIncrementDescription:[NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledSQL, 2)]];
NSMenuItem* mi = [[NSMenuItem alloc]
initWithTitle:[bi strIncrementValueDescription]
action:Nil
keyEquivalent:[bi strIncrementValue]];
[mi setTarget:self];
[mi setRepresentedObject:bi];
[mi setTag:[[bi intIncrementId] integerValue]];
[mnuBackupIncrement addItem:mi];
NSLog(@"Menu Item: %@", mi);
NSLog(@"Menu Item Title: %@", [mi title]);
NSLog(@"Menu Item Tag: %ld", (long)[mi tag]);
//[[pubDefaultIncrement menu] addItem:mi];
//[marBackupIncrement addObject:bi];
}
}
//NSLog(@"%@", mnuBackupIncrement);
//[pubDefaultIncrement setTarget:self];
[[pubDefaultIncrement menu] setSupermenu:mnuBackupIncrement];
[pubDefaultIncrement setMenu:mnuBackupIncrement];
}
sql工作,它循环5次从sqlite3表中获取每一行。
此:
NSLog(@"%@", mnuBackupIncrement);
打印出菜单对象,里面有5个菜单项对象。
然而,当我运行我的项目代码时,弹出按钮有3件事。
1st: a blank item
2nd: Item 2
3rd: Item 3
我最初尝试使用ArrayController和Bindings,但我似乎无法让每个菜单项的标签正常工作。如果这是这样做的方式,我很乐意听取绑定的正确方法。
就是f.y.i. BackupIncrement对象公开4个属性:
intIncrementId: the primary key from the table (1-5 currently for the 5 rows)
strIncrementValue: the single letter value from the table (h, d, w, m, y)
strIncrementDescription: the desc for the value (hour, day, week, month, year)
strIncrementValueDescription: a combination of the previous two - e.g. "d (day)", "m (month)"
所以再次 - 理想情况下,id使NSPopUpButton填充了menuitems,其中strIncrementValueDescription作为可见的“content”,相应的intIncrementId作为“value”,这样当选择一个项目时我可以得到标签或者相应的行为
有人能指出我正确的方向吗?
谢谢!
答案 0 :(得分:2)
事实证明(再次)我的问题是时间问题。我在ViewController的initWithNibName ...
中调用了有问题的函数- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Initialization code here.
if (!claAppDelegate) {
claAppDelegate = [[AppDelegate alloc] init];
}
//[self doAddItemsTopubDefaultBackupIncrement]; <--- HERE doesn't work....
}
return self;
}
相反,我应该在之后调用来加载ViewController:
- (void)loadView {
[self viewWillLoad];
[super loadView];
[self viewDidLoad]; // <-- call in here instead
}
- (void)viewDidLoad {
[self doAddItemsTopubDefaultBackupIncrement]; //<-- HERE: works just fine...
[pubDefaultIncrement selectItemWithTag:claAppDelegate.intDefaultBackupIncrmentId];
}