所以继续我的挂断,我创建一个数组,将按钮传递到它并使用for循环试图将每个按钮放在视图上.我知道他们将处于相同的位置,因为他们都经历了相同的CGRectMake.但是我似乎无法在屏幕上放置任何代码,尽管它没有返回任何错误,但仍然让我难以理解为什么.
有人有什么建议吗？谢谢!
- (void)practiceMethod{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Practice Method has begun" message:@"Alert" delegate: self cancelButtonTitle:@"Close" otherButtonTitles: nil];
//[alert show];
[alert release];
float i=0;
CGRect applicationFrame = [[UIScreen mainScreen] applicationFrame];
UIImage *buttonGraphic = [UIImage imageNamed:@"1.png"];
UIButton *buttonOne = [[UIButton alloc] initWithFrame:applicationFrame];
UIButton *buttonTwo = [[UIButton alloc] initWithFrame:applicationFrame];
buttonArray = [[NSArray alloc] initWithObjects:buttonOne, buttonTwo,nil];
for (i = 0; i > [buttonArray count]; i++) {
UIButton *tempElement = [buttonArray objectAtIndex:i];
tempElement.frame = CGRectMake(140, 230, 50, 50);
[tempElement setBackgroundImage:buttonGraphic forState:UIControlStateNormal];
[self addSubview:tempElement]; …所以我对核心数据非常新,但是我经历了一个教程并且非常了解它,至少是大多数事情背后的想法.但我还有一个问题,我无法找到任何地方.看起来很简单,但现在就是这样.如果我在一个实体中有两个字符串,我们可以说:
1.name
2.position
如果已输入名称,我如何允许用户在textField中输入文本并在以后将其分配到其位置？即使有20个名字,考虑没有重复？
我以为它可能是这样的......但它似乎没有用.
UserInfo *userInfo = (UserNumber *)[NSEntityDescription insertNewObjectForEntityForName:@"UserInfo" inManagedObjectContext:managedObjectContext];
if ([userName isEqualToString:"@James"]) {
userInfo.Position = nameField.text;
}
我开始为iPad设计一款新游戏,我发了一篇文章说我应该用C而不是Objective-c来编写游戏,因为Objective-c太慢了.
任何人都可以评论这个吗？我不知道C或C++,但我想找到开发这个游戏的最佳方法.
谢谢!
我试图使用"isEqualToString"比较两个字符串,我似乎无法让它工作.一旦它开始运行if语句,它就会退出应用程序.我很确定这些琴弦实际上是相互平等的,尽管我最好的尝试,我仍然没有想法.任何帮助,将不胜感激.
-(void)createTextfields{
name = [[UITextField alloc] initWithFrame:CGRectMake(10, 0, 140, 25)];
name.borderStyle = UITextBorderStyleRoundedRect;
name.textColor = [UIColor blackColor];
name.placeholder = @"Password";
name.textAlignment = UITextAlignmentCenter;
[self addSubview:name];
entry = [[UITextField alloc] initWithFrame:CGRectMake(170, 0, 140, 25)];
entry.borderStyle = UITextBorderStyleLine;
entry.textColor = [UIColor blueColor];
entry.textAlignment = UITextAlignmentCenter;
[self addSubview:entry];
}
-(void)createSubmitButton{
UIButton *submit = [UIButton buttonWithType:UIButtonTypeRoundedRect];
submit.titleLabel.textAlignment = UITextAlignmentCenter;
[submit setTitle:@"Submit" forState:UIControlStateNormal];
submit.frame = CGRectMake(90, 50, 60, 30);
[submit addTarget:self action:@selector(runSubmit) forControlEvents:UIControlEventTouchUpInside];
[self addSubview:submit];
UIButton *savePass = [UIButton buttonWithType:UIButtonTypeRoundedRect];
savePass.titleLabel.textAlignment = UITextAlignmentCenter;
[savePass setTitle:@"Save" …我无法弄清楚为什么这不起作用......
if (index != 10 || index != 0) {
如果index = 0仍然允许该功能,为什么？