如何自定义iOS警报视图？

Question

我想在我的iOS应用程序中创建自定义alert view。例如，我想在此alert中放置一些images，并更改其颜色。

我知道如何创建一个正常的UIAlertView，但是有没有办法自定义一个alert view？

Answer 1

我建立了自己的UIViewController，我可以使用自己的图像进行皮肤处理。我通常只使用一个或两个按钮，所以我隐藏第二个按钮，如果它没有被使用。该视图实际上是整个屏幕的大小，因此它会阻挡它后面的触摸，但它大部分是透明的，所以背景显示为透明。

将它带入时，我会使用一些动画使其像苹果的警报视图一样反弹。类似这样的作品：

-(void)initialDelayEnded { 
    self.view.transform = CGAffineTransformScale(CGAffineTransformIdentity, 0.001, 0.001); 
    self.view.alpha = 1.0; 
    [UIView beginAnimations:nil context:nil]; 
    [UIView setAnimationDuration:kTransitionDuration/1.5]; 
    [UIView setAnimationDelegate:self]; 
    [UIView setAnimationDidStopSelector:@selector(bounce1AnimationStopped)]; 
    self.view.transform = CGAffineTransformScale(CGAffineTransformIdentity, 1.1, 1.1); 
    [UIView commitAnimations]; 
} 

- (void)bounce1AnimationStopped { 
    [UIView beginAnimations:nil context:nil]; 
    [UIView setAnimationDuration:kTransitionDuration/2]; 
    [UIView setAnimationDelegate:self]; 
    [UIView setAnimationDidStopSelector:@selector(bounce2AnimationStopped)]; 
    self.view.transform = CGAffineTransformScale(CGAffineTransformIdentity, 0.9, 0.9); 
    [UIView commitAnimations]; 
} 

- (void)bounce2AnimationStopped { 
    [UIView beginAnimations:nil context:nil]; 
    [UIView setAnimationDuration:kTransitionDuration/2]; 
    self.view.transform = CGAffineTransformIdentity; 
    [UIView commitAnimations]; 
} 

我有可能在类中建立一个短暂的延迟，所以当延迟结束时调用initialDelayEnded。

当初始化时，我传入一个对象和选择器，我想在每个按钮被按下时调用，然后在按下按钮时在对象上调用适当的选择器。

Answer 2

你需要创建自己的自定义视图，并实现一些警报视图样式的行为，例如显示模式方式，调光的背景，动画和退出等

有一个在SDK中不支持定制一个比文本或按钮更远的UIAlertView。

Answer 3

http://iphonedevelopment.blogspot.com/2010/05/custom-alert-views.html

和

http://www.skylarcantu.com/blog/2009/08/14/custom-uialertview-color-chooser/

您可以使用上面针对自定义提醒的链接。我希望这些会对你有所帮助。

Answer 4

下面是我写的一个自定义警报视图，它是UIAlertView的替代插件。您可以设置自定义背景图片;支持自定义背景颜色并不难。

https://github.com/TomSwift/TSAlertView

Answer 5

的UIAlertView中创建一个子类。

并为Alert View方法创建公共类。 为其添加2以下方法。现在

#pragma mark Alert View Functions 
+(void)alertViewWithYesNo:(NSString *)pstrTitle:(NSString *)pstrMessage:(int)pstrTagId:(id)pDelegate{ 
UIAlertView *objAlertNotify = [[UIAlertView alloc] init]; 
[objAlertNotify setDelegate:pDelegate]; 

[objAlertNotify addButtonWithTitle:@""]; 
[objAlertNotify addButtonWithTitle:@""]; 
int intTemp = 1; 
for (UIView* view in [objAlertNotify subviews]) 
{ 
    if ([[[view class] description] isEqualToString:@"UIAlertButton"]) 
    { 
     UILabel *theTitle = [[UILabel alloc] init]; 
     [theTitle setFont:[UIFont fontWithName:@"Helvetica-Bold" size:g_AlertFontSize]]; 
     [theTitle setTextColor:[UIColor whiteColor]]; 
     switch (intTemp) { 
      case 1: 
       [theTitle setText:@"Yes"]; 
       //[theTitle setTextColor:g_ColorYes]; 
       break; 
      case 2: 
       [theTitle setText:@"No"]; 
       //[theTitle setTextColor:g_ColorNo]; 
       break; 
     } 
     intTemp++; 

     [theTitle setBackgroundColor:[UIColor clearColor]];    
     [theTitle setTextAlignment:UITextAlignmentCenter]; 
     [view addSubview:theTitle]; 
    } 
    else if ([[[view class] description] isEqualToString:@"UIThreePartButton"]) 
    { 
     UILabel *theTitle = [[UILabel alloc] init]; 
     [theTitle setFont:[UIFont fontWithName:@"Helvetica-Bold" size:g_AlertFontSize]]; 
     [theTitle setTextColor:[UIColor whiteColor]]; 
     switch (intTemp) { 
      case 1: 
       [theTitle setText:@"Yes"]; 
       //[theTitle setTextColor:g_ColorYes]; 
       break; 
      case 2: 
       [theTitle setText:@"No"]; 
       //[theTitle setTextColor:g_ColorNo]; 
       break; 
     } 
     intTemp++; 

     [theTitle setBackgroundColor:[UIColor clearColor]];    
     [theTitle setTextAlignment:UITextAlignmentCenter]; 
     [view addSubview:theTitle]; 
    } 
} 
[objAlertNotify setTag:pstrTagId]; 
[objAlertNotify setTitle:pstrTitle]; 
[objAlertNotify setMessage:pstrMessage]; 
[objAlertNotify show]; 
} 

+(void)alertViewBtnText:(UIAlertView *)alertView{ 
for (UIView* view in [alertView subviews]) 
{ 
    //NSLog(@"%@", [[view class] description]); 

    if ([[[view class] description] isEqualToString:@"UIAlertButton"]) 
    { 
     for (UILabel *lbl in [view subviews]) 
     { 
      //NSLog(@"%@", [[lbl class] description]); 

      if ([[[lbl class] description] isEqualToString:@"UILabel"]) 
      { 
       CGRect frame = [view bounds]; 

       CGSize maximumLabelSize = CGSizeMake(320,480); 
       CGSize expectedLabelSize = [lbl.text sizeWithFont:lbl.font constrainedToSize:maximumLabelSize lineBreakMode:lbl.lineBreakMode]; 
       CGRect newFrame = lbl.frame; 
       newFrame.origin.x = newFrame.origin.x - expectedLabelSize.width/2; 
       newFrame.size.height = expectedLabelSize.height; 
       newFrame.size.width = expectedLabelSize.width; 
       lbl.frame = newFrame; 
       //frame.size.width = 320.0; 
       //frame.size.height = 480.0; 

       lbl.frame = frame; 
       [lbl setCenter:CGPointMake([view bounds].size.width/2, [view bounds].size.height/2)]; 
      } 
     } 
    } 
    else if ([[[view class] description] isEqualToString:@"UIThreePartButton"]) 
    { 
     for (UILabel *lbl in [view subviews]) 
     { 
      CGRect frame = [view bounds]; 

      CGSize maximumLabelSize = CGSizeMake(320,480); 
      CGSize expectedLabelSize = [lbl.text sizeWithFont:lbl.font constrainedToSize:maximumLabelSize lineBreakMode:lbl.lineBreakMode]; 
      CGRect newFrame = lbl.frame; 
      newFrame.origin.x = newFrame.origin.x - expectedLabelSize.width/2; 
      newFrame.size.height = expectedLabelSize.height; 
      newFrame.size.width = expectedLabelSize.width; 
      lbl.frame = newFrame; 
      //frame.size.width = 320.0; 
      //frame.size.height = 480.0; 

      lbl.frame = frame; 
      [lbl setCenter:CGPointMake([view bounds].size.width/2, [view bounds].size.height/2)]; 
     } 
    } 
} 
} 

，在任何类，您使用此自定义提醒： 以下地址：

#pragma mark UIAlertViewDelegate 
-(void)willPresentAlertView:(UIAlertView *)alertView{ 

if(alertView==objAlertMsg){ 
    /*clsCommonFuncDBAdapter *objclsCommonFuncDBAdapter = [[clsCommonFuncDBAdapter alloc] init]; 
    float newHeight = [objclsCommonFuncDBAdapter getAlertHeightByMessage:alertView.frame.size.width :alertView.message] + [g_AlertExtraHeight intValue]; 
    [objclsCommonFuncDBAdapter release]; 

    //NSLog(@"X = %f, Y = %f, Widht = %f, Height = %f", alertView.frame.origin.x, alertView.frame.origin.y, alertView.frame.size.width, alertView.frame.size.height); 
    //[alertView setFrame:CGRectMake(alertView.frame.origin.x, alertView.frame.origin.y, alertView.frame.size.width, 110.0)]; 
    [alertView setFrame:CGRectMake(alertView.frame.origin.x, alertView.frame.origin.y, alertView.frame.size.width, newHeight)];*/ 
} 

[clsCommonFuncDBAdapter alertViewBtnText:alertView]; 

} 

对于调用它： 使用如下：

-(void)askForGPSEnable{ 
[clsCommonFuncDBAdapter alertViewWithYesNo:msgGPSTitle :msgGPSMessage :0 :self]; 
} 

让我知道如有任何困难。

Answer 6

对于custom alert view，Git集线器上有很好的例子。它在核心中使用UI警报视图，并提供了多种方法来以不同方式定制警报视图