首先要自定义一个UIAlertView扩展类,如MAlertView: php
.h文件 函数
#import <Foundation/Foundation.h> spa
@interface MAlertView : UIAlertView { .net
UITextField *passwdField; code
NSInteger textFieldCount; orm
} get
- (void)addTextField:(UITextField *)aTextField placeHolder:(NSString *)placeHolder; it
@end io
.m文件 class
#import "MAlertView.h"
#define kMAlertViewTextFieldHeight 30.0
#define kMAlertViewMargin 10.0
@implementation MAlertView
- (void)initialize{
}
//2 buttons supported at most
- (id)initWithTitle:(NSString *)title message:(NSString *)message delegate:(id)delegate cancelButtonTitle:(NSString *)cancelButtonTitle otherButtonTitles:(NSString *)otherButtonTitles, ...{
if ((self = [super initWithTitle:title message:message delegate:delegate cancelButtonTitle:cancelButtonTitle otherButtonTitles:otherButtonTitles,nil])) {
}
return self;
}
- (void)layoutSubviews{
CGRect rect = self.bounds;
rect.size.height += textFieldCount*(kMAlertViewTextFieldHeight + kMAlertViewMargin);
self.bounds = rect;
float maxLabelY = 0.f;
int textFieldIndex = 0;
for (UIView *view in self.subviews) {
if ([view isKindOfClass:[UIImageView class]]) {
}
else if ([view isKindOfClass:[UILabel class]]) {
rect = view.frame;
maxLabelY = rect.origin.y + rect.size.height;
}
else if ([view isKindOfClass:[UITextField class]]) {
rect = view.frame;
rect.size.width = self.bounds.size.width - 2*kMAlertViewMargin;
rect.size.height = kMAlertViewTextFieldHeight;
rect.origin.x = kMAlertViewMargin;
rect.origin.y = maxLabelY + kMAlertViewMargin*(textFieldIndex+1) + kMAlertViewTextFieldHeight*textFieldIndex;
view.frame = rect;
textFieldIndex++;
}
else { //UIThreePartButton
rect = view.frame;
rect.origin.y = self.bounds.size.height - 65.0;
view.frame = rect;
}
}
}
- (void)addTextField:(UITextField *)aTextField placeHolder:(NSString *)placeHolder{
if (aTextField != nil) {
textFieldCount++;
aTextField.frame = CGRectZero;
aTextField.borderStyle = UITextBorderStyleRoundedRect;
aTextField.placeholder = placeHolder;
[self addSubview:aTextField];
// [self setNeedsLayout];
}
}
如何使用此扩展类:
- (void)viewDidLoad
{
[superviewDidLoad];
MAlertView *alert = [[MAlertViewalloc] initWithTitle:@"Title"message:nildelegate:selfcancelButtonTitle:@"Cancel"otherButtonTitles:@"OK",nil];
UITextField* accountField=[[UITextFieldalloc]init];
UITextField* passwdField=[[UITextFieldalloc]init];
[alert addTextField:accountField placeHolder:@"Account"];
[alert addTextField:passwdField placeHolder:@"Password"];
[alert show];
[alert release];
}
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex//按键响应函数
{
NSString* msg = [[NSStringalloc] initWithFormat:@"您按下的第%d个按钮!",buttonIndex];
UIAlertView* alert = [[UIAlertViewalloc]initWithTitle:@"提示"
message:msg
delegate:nil
cancelButtonTitle:@"肯定"
otherButtonTitles:nil];
[alert show];
[alert release];
[msg release];
}
效果如图。
进行了简单的封装,只须要用addTextField:placeHolder:方法将textField加进去就行了,其余使用方法和UIAlertView彻底同样。
再做些补充说明:由于UIAlertView只有在点击了按钮才能进行交互,全部的text值都是在点击以后获取对应的textField的值。
有些朋友说空值的状况,这个能够在点击以后判断若是是空值就再次弹出alertView就能够了
参考:http://www.cocoachina.com/bbs/read.php?tid=86733