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问题:
Adding some controls to UIAlertView
was deprecated in iOS7 using addSubview
method. As I know Apple promised to add contentView
property.
iOS 7 is released now and I see that this property is not added. That is why I search for some custom solution with ability to add progress bar to this alertView. Something for example similar to TSAlertView, but more ready for using in iOS 7.
回答1:
Here is a project on Github to add any UIView to an UIAlertView-looking dialog on iOS7.
(Copied from this StackOverflow thread.)
回答2:
It took me only 1 day to create my own alert view that looks exactly like Apple's
- Take a screenshot of Apple's alert for reference (font sizes, spacings, width)
- Create a xib with title, message, custom view and tables for buttons (Apple uses tables instead of
UIButton
now, default table cell is good enough). Note you need 3 button tables: two for left and right buttons (whenever the number of buttons is 2), another one for the other cases (one button or more than 2 buttons). Implement all the methods from UIAlertView
on your custom alert.
Show/Dismiss - you can create a specific modal window for your alerts but I just put my alerts on top of my root view controller. Register your visible alerts to a static array. If showing the first alert/dismissing the last, change tint mode of your window/view controller to dimmed/to automatic and add/remove a dimming view (black with alpha = 0.2).
- Blurred background - use Apple's sample code (I used opaque white)
- 3D dynamic effects - use Apple's sample code (5 lines of code). If you want a nice effect, take a slightly bigger snapshot in step 5 and add inverse animators for alert background and foreground.
EDIT:
Both blurred background and the paralax effect sample code can be found in "iOS_RunningWithASnap" WWDC 2013 sample code
Paralax effect:
UIInterpolatingMotionEffect* xAxis = [[[UIInterpolatingMotionEffect alloc] initWithKeyPath:@"center.x" type:UIInterpolatingMotionEffectTypeTiltAlongHorizontalAxis] autorelease]; xAxis.minimumRelativeValue = [NSNumber numberWithFloat:-10.0]; xAxis.maximumRelativeValue = [NSNumber numberWithFloat:10.0]; UIInterpolatingMotionEffect* yAxis = [[[UIInterpolatingMotionEffect alloc] initWithKeyPath:@"center.y" type:UIInterpolatingMotionEffectTypeTiltAlongVerticalAxis] autorelease]; yAxis.minimumRelativeValue = [NSNumber numberWithFloat:-10.0]; yAxis.maximumRelativeValue = [NSNumber numberWithFloat:10.0]; UIMotionEffectGroup *group = [[[UIMotionEffectGroup alloc] init] autorelease]; group.motionEffects = @[xAxis, yAxis]; [self addMotionEffect:group];
The blurred background is the only complicated thing. If you can use an opaque color instead, use it. Otherwise it's a lot of experimenting. Also note that blurred background is not a good solution when the background is dark.
For the show/dismiss animationg, I am using the new spring animation method:
void (^animations)() = ^{ self.alpha = 1.0f; self.transform = CGAffineTransformIdentity; }; self.alpha = 0.0f; self.transform = CGAffineTransformMakeScale(0.5f, 0.5f); [UIView animateWithDuration:0.3 delay:0.0 usingSpringWithDamping:0.7f initialSpringVelocity:0.0f options:UIViewAnimationOptionCurveLinear animations:animations completion:^(BOOL completed) { //calling UIAlertViewDelegate method }];
回答3:
I wrote a full implementation of UIAlertView that mimics the complete UIAlertView API, but adds the contentView property we've all wanted for so long: SDCAlertView.
回答4:
For those who love simple and effective methods with out having to write lines of code. Here is a cool solution without using any other private frame works for adding subviews to ios 7 alert views,i.e.
[alertView setValue:imageView forKey:@"accessoryView"];
Sample code for better understanding,
UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(180, 10, 85, 50)]; UIImage *wonImage = [UIImage imageNamed:@"image.png"]; [imageView setImage:wonImage]; //check if os version is 7 or above if (floor(NSFoundationVersionNumber) > NSFoundationVersionNumber_iOS_6_1) { [alertView setValue:imageView forKey:@"accessoryView"]; }else{ [alertView addSubview:imageView]; }
Hope it helps some one,thanks :)
回答5:
For IOS7
UIAlertView *alertView1 = [[UIAlertView alloc] initWithTitle:@"Enter Form Name" message:@"" delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:@"Ok", nil]; alertView1.alertViewStyle = UIAlertViewStyleSecureTextInput; UITextField *myTextField = [alertView1 textFieldAtIndex:0]; [alertView1 setTag:555]; myTextField.keyboardType=UIKeyboardTypeAlphabet; [alertView1 show];
回答6:
There wont be UIAlertView
with custom views in iOS7, nor contentView
which Apple changed its mind about, so addSubview
is impossible now in UIAlertView
.
A good alternative will be SVProgressHUD, according to many threads in Apple's forum.
Edit:
There is officially no addSubview
nor subclassing for UIAlertView
in iOS7.
The UIAlertView class is intended to be used as-is and does not support subclassing. The view hierarchy for this class is private and must not be modified.
Other good alternatives:
ios-custom-alertview by wimagguc
MZFormSheetController.
回答7:
You can find simple solution without extra classes here
It is based on setting accessoryView for ordinary UIAlertView.
回答8:
PKAlertController (https://github.com/goodpatch/PKAlertController) is great library. I tested a lot of similar libraries and just this satisfied all my requirements.
Why it is cool:
- Supports custom view
- Supports iOS7
- It is view controller
- It behaves and looks like native alert view, including motion effects
- Customizable
- Similar interface like in UIAlertController