viewController.h
#import <UIKit/UIKit.h>
@interface ViewController : UIViewController<UITextFieldDelegate>
@property UITextField *t1,*t2,*t3,*t4,*t5;
@end
viewController.m
#import "ViewController.h"
@interface ViewController ()
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
[self UIElements];
// Do any additional setup after loading the view, typically from a nib.
}
-(void)UIElements
{
self.t1=[[UITextField alloc]initWithFrame:CGRectMake(20, 50, 100, 30)];
self.t1.borderStyle=UITextBorderStyleBezel;
self.t1.placeholder=@"name";
self.t1.delegate=self;
[self.view addSubview:self.t1];
self.t2=[[UITextField alloc]initWithFrame:CGRectMake(20, 100, 100, 30)];
self.t2.borderStyle=UITextBorderStyleBezel;
self.t2.placeholder=@"name";
self.t2.delegate=self;
[self.view addSubview:self.t2];
self.t3=[[UITextField alloc]initWithFrame:CGRectMake(20, 150, 100, 30)];
self.t3.borderStyle=UITextBorderStyleBezel;
self.t3.placeholder=@"name";
self.t3.delegate=self;
[self.view addSubview:self.t3];
self.t4=[[UITextField alloc]initWithFrame:CGRectMake(20, 200, 100, 30)];
self.t4.borderStyle=UITextBorderStyleBezel;
self.t4.placeholder=@"name";
self.t4.delegate=self;
[self.view addSubview:self.t4];
self.t5=[[UITextField alloc]initWithFrame:CGRectMake(20, 250, 100, 30)];
self.t5.borderStyle=UITextBorderStyleBezel;
self.t5.placeholder=@"name";
self.t5.delegate=self;
[self.view addSubview:self.t5];
}
-(BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
{
if (textField==self.t1) {
NSCharacterSet *t1Set=[NSCharacterSet characterSetWithCharactersInString:@"qwertyuioplkjhgfdsazxcvbnmMNBVCXZASDFGHJKLPOIUYTREWQ"];
for (int i=0; i<[string length]; i++) {
unichar c=[string characterAtIndex:i];
if (![t1Set characterIsMember:c]) {
return NO;
}
}
NSUInteger t1Length=self.t1.text.length-range.length;
return (t1Length<10);
}
return YES;
}
-(BOOL)textFieldShouldBeginEditing:(UITextField *)textField
{
if ([textField isEqual:self.t2]) {
self.t2.backgroundColor=[UIColor redColor];
return YES;
}
return YES;
}
-(BOOL)textFieldShouldEndEditing:(UITextField *)textField
{
if (textField==self.t3) {
self.t4.backgroundColor=[UIColor yellowColor];
return YES;
}
return YES;
}
-(void)textFieldDidBeginEditing:(UITextField *)textField
{
if (textField==self.t4) {
self.t5.hidden=YES;
}
}
-(void)textFieldDidEndEditing:(UITextField *)textField
{
if (textField==self.t3) {
self.t4.hidden=YES;
}
}
-(BOOL)textFieldShouldClear:(UITextField *)textField
{
if (textField==self.t2) {
self.t1.hidden=YES;
}
return YES;
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
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