我用
[textField becomeFirstResponder];
设置键盘总是出现，但 UITextfield 中缺少光标。
当键盘出现时，如何设置光标仍然显示？？？
#import "Utility.h"
#import "InputViewController.h"
#import "SmsViewController.h"
@implementation InputViewController
@synthesize label,subLabel,textField;
@synthesize input,min,max,inputNo,letterOnly;
@synthesize nextInputViewController;
static NSMutableArray* inputList = nil;
static NSCharacterSet* letterSet;
static NSCharacterSet* digitSet;
+ (NSMutableArray*) inputList {
if (inputList == nil) {
inputList = [[NSMutableArray alloc] init];
}
return inputList;
}
// The designated initializer. Override if you create the controller programmatically and want to perform customization that is not appropriate for viewDidLoad.
/*
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization.
}
return self;
}
*/
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad {
[super viewDidLoad];
// [textField becomeFirstResponder];
// initialize STATIC variables if neccessary
if (inputList == nil) {
inputList = [[NSMutableArray alloc] init];
}
if (letterSet == nil) {
letterSet = [NSCharacterSet alphanumericCharacterSet];
}
if (digitSet == nil) {
digitSet = [NSCharacterSet decimalDigitCharacterSet];
}
min = [[input objectForKey:@"Min"] intValue];
max = [[input objectForKey:@"Max"] intValue];
letterOnly = [[input objectForKey:@"AlphaOnly"] boolValue];
label.text = [input objectForKey:@"Title"];
if (letterOnly) {
subLabel.text = [NSString stringWithFormat:@"Chú ý: Chỉ chấp nhận các ký tự A-Z a-z 0-9"];
}
else {
subLabel.text = [NSString stringWithFormat:@"Chú ý: Chỉ chấp nhận các số từ 0-9"];
}
textField.secureTextEntry = [[input objectForKey:@"Secure"] boolValue];
textField.keyboardType = letterOnly ? UIKeyboardTypeASCIICapable : UIKeyboardTypeNumbersAndPunctuation;
if ([[input objectForKey:@"Input"] count] == 0) {
textField.returnKeyType = UIReturnKeyDone;
} else {
textField.returnKeyType = UIReturnKeyNext;
}
}
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
// auto focus on textField for waiting input
//[textField becomeFirstResponder];
}
/*
// Override to allow orientations other than the default portrait orientation.
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
// Return YES for supported orientations.
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
*/
- (void)didReceiveMemoryWarning {
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
// Release any cached data, images, etc. that aren't in use.
}
- (void)viewDidUnload {
[super viewDidUnload];
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}
- (void)dealloc {
[input release];
[nextInputViewController release];
[super dealloc];
}
- (BOOL)textField:(UITextField *)theTextField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string {
if (theTextField == textField) {
// check maximum length
if ([textField.text length] > max) {
return NO;
}
// check Letter only or Digit only
if ([string length] == 1) {
if (letterOnly) {
if (![letterSet characterIsMember:[string characterAtIndex:0]]) {
return NO;
}
}
else {
if (![digitSet characterIsMember:[string characterAtIndex:0]]) {
return NO;
}
}
}
}
return YES;
}
- (BOOL)textFieldShouldReturn:(UITextField *)theTextField {
// When the user presses return, take focus away from the text field so that the keyboard is dismissed.
if (theTextField == textField) {
// [textField becomeFirstResponder];
int length = [textField.text length];
if (length < min) {
[Utility showAlert:[NSString stringWithFormat:@"%@ phải có chiều dài tối thiểu là %d!", label.text, min]];
return NO;
}
else if ([label.text isEqualToString:@"Nhập mã bí mật mới"] &&
[textField.text isEqualToString:[inputList objectAtIndex:(inputNo-1)]] ) {
[Utility showAlertWithTitle:@"Không hợp lệ" Content:@"Số bí mật mới giống hệt số cũ!"];
return NO;
}
else if ([label.text isEqualToString:@"Xác nhận mã bí mật mới"] &&
![textField.text isEqualToString:[inputList objectAtIndex:(inputNo-1)]] ) {
[Utility showAlertWithTitle:@"Không hợp lệ" Content:@"Mã mới nhập lại không khớp với mã mới nhập lần đầu!"];
return NO;
}
else {
// [textField resignFirstResponder];
[self acceptInput:nil];
}
}
return YES;
}
- (IBAction)acceptInput: (id)sender {
int length = [textField.text length];
if (length < min) {
[Utility showAlert:[NSString stringWithFormat:@"%@ phải có chiều dài tối thiểu là %d!", label.text, min]];
return;
}
if ([inputList count] == inputNo) {
[inputList addObject:(NSString*)textField.text];
}
else {
[inputList replaceObjectAtIndex:inputNo withObject:(NSString*)textField.text];
}
NSDictionary* nextInput = [input objectForKey:@"Input"];
if ([nextInput count] == 0) {
SmsViewController* smsViewController = [[SmsViewController alloc] initWithNibName:@"SmsViewController" bundle:nil];
smsViewController.title = @"SMS";
smsViewController.sms = [input objectForKey:@"SMS"];
smsViewController.smsDetails = inputList;
NSString* confirm = [smsViewController.sms objectForKey:@"Confirm"];
[self.navigationController pushViewController:smsViewController animated:YES];
if (confirm == nil || [confirm isEqualToString:@""]) {
// special case
[smsViewController showSMSPicker:smsViewController];
}
[smsViewController release];
}
else {
if (nextInputViewController == nil) {
nextInputViewController = [[InputViewController alloc] initWithNibName:@"InputViewController" bundle:[NSBundle mainBundle]];
nextInputViewController.title = self.title;
nextInputViewController.input = nextInput;
nextInputViewController.inputNo = inputNo + 1;
}
[self.navigationController pushViewController:nextInputViewController animated:NO];
/*
InputViewController *ivController = [[InputViewController alloc] initWithNibName:@"InputViewController" bundle:[NSBundle mainBundle]];
ivController.title = self.title;
ivController.input = nextInput;
ivController.inputNo = inputNo + 1;
[self.navigationController pushViewController:ivController animated:YES];
[ivController release];
*/
}
}
@end