iphone:如何自定義iOS警報视圖？

我設置了自己的UIViewController，可以用自己的圖像蒙皮.我通常只使用一个或两个按钮，因此如果不使用第二个按钮則將其隱藏.该视圖實際上是整个螢幕的大小，因此它阻止了其後面的觸摸，但是它几乎是透明的，因此背景可以顯示出来。

在引入它時，我使用了一些動画使其像苹果的警報视圖一樣弹起.像這樣的作品：

-(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];
}

我有可能在類中內建一个短暂的延迟，因此当延迟結束時会呼叫initialDelayEnded。

初始化時，我傳入一个物件和要在按下每个按钮時呼叫的選擇器，然後在按下按钮時在该物件上呼叫適当的選擇器。

這是自定義警報 我寫的视圖是UIAlertView的直接替代.您可以設置自定義背景圖片； 擴充套件支援自定義背景颜色將很容易。

https://github.com/TomSwift/TSAlertView

為UIAlertView建立一个子類。

並為Alert View方法建立通用類。 在下面添加2个方法。

#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)];
        }
    }
}
}

現在，在任何類中，您都在使用此自定義警報： 在下面添加：

#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];
}

呼叫它： 如下使用：

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

万一遇到困难，請告诉我。

您需要建立自己的自定義视圖，並實現一些警報视圖樣式的行為，例如以模態顯示，調暗背景，動画顯示 等等。

除了文字或按钮之外，SDK中不支援自定義UIAlertView。

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

和

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

您可以使用以上鏈接来定製警報.希望這些對您有所帮助。