IOS development-UIView Summary

If you want to call a method of a class, you can write this method from the NSObject class.

 

C code example mselector:
PerformSelector: withObject:
PerformSelector: withObject:

Actual call

 

C code [self defined mselector: @ selector (displayViews) withObject: nil afterDelay: 1.0f];

There are three methods:

 

C code // parent View
[Self. view superview]
// All subviews
[Self. view subviews]
// Its own window
Self. view. window

Loop the methods of all views under a view

 

C code NSArray * allSubviews (UIView * aView)
{
NSArray * results = [aView subviews];
For (UIView * eachView in [aView subviews])
{
NSArray * riz = allSubviews (eachView );
If (riz ){
Results = [results arrayByAddingObjectsFromArray: riz];
}
}
Return results;
}

Returns all views in an APPLICATION in a loop.

 

C code // Return all views throughout the application
NSArray * allApplicationViews ()
{
NSArray * results = [[UIApplication sharedApplication] windows];
For (UIWindow * window in [[UIApplication sharedApplication] windows])
{
NSArray * riz = allSubviews (window );
If (riz) results = [results arrayByAddingObjectsFromArray: riz];
}
Return results;
}
 
Find all parent views

 

C code // Return an array of parent views from the window down to the view
NSArray * pathToView (UIView * aView)
{
NSMutableArray * array = [NSMutableArray arrayWithObject: aView];
UIView * view = aView;
UIWindow * window = aView. window;
While (view! = Window)
{
View = [view superview];
[Array insertObject: view atIndex: 0];
}
Return array;
}

UIView provides a large number of management views

 

C code // Add a view to a view
AddSubview:
// Move a View to the front
BringSubviewToFront:
// Push a View to the back
SendSubviewToBack:
// Remove the view
RemoveFromSuperview
// Insert the view and specify the index
InsertSubview: atIndex:
// Insert a view above a view
InsertSubview: aboveSubview:
// Insert a view under a view
InsertSubview: belowSubview:
// Exchange views of Two-position Indexes
ExchangeSubviewAtIndex: withSubviewAtIndex:

View callback

 

C code // call after the view is added
(Void) didAddSubview :( UIView *) subview
// Called when the view is moved
(Void) didMoveToSuperview
// Call after the view is moved to the new WINDOW
(Void) didMoveToWindow
// Call after deleting the view
(Void) willRemoveSubview :( UIView *) subview
// Called before the view is moved
(Void) didMoveToSuperview :( UIView *) subview
// Called before the view is moved to the WINDOW
(Void) didMoveToWindow

Set tag and search view for UIView

 

C code myview. tag = 1001;
[Self. view viewwithtagag: 1001];
(UILable *) [self. view. window viewWithTag: 1001];

View geometric features

 

C code // framework
Struct CGPoint {
CGFloat x;
CGFloat y;
};
Typedef struct CGPoint;
 
/* Sizes .*/
 
Struct CGSize {
CGFloat width;
CGFloat height;
};
Typedef struct CGSize;
 
Struct CGRect {
CGPoint origin;
CGSize size;
};
Typedef struct CGRect;
 
 
 
CGRect rect = CGRectMake (0, 0, 320,480 );
UIView * view = [[UIView allow] initWithFrame: rect];
 
// Convert String to CGPoint such as @ "{3.0, 2.5}" {x, y}
CGPoint CGPointFromString (
NSString * string
);
 
// Convert String to CGRect @ "{3, 2}, {4, 5}" {x, y}, {w, h }}
CGRect CGRectFromString (
NSString * string
);
 
// Convert String to CGSize @ "{3.0, 2.5}" {w, h}
CGSize CGSizeFromString (
NSString * string
);
 
// Convert CGPoint to NSString
NSString * NSStringFromCGPoint (
CGPoint point
);
 
// Convert CGRect to NSString
NSString * NSStringFromCGRect (
CGRect rect
);
 
// Convert CGSize to NSString
NSString * NSStringFromCGSize (
CGSize size
);
 
// Modify a CGRect. Change the positive number in the center to indicate smaller (reduced) negative number to greater (enlarged)
CGRect CGRectInset (
CGRect rect,
CGFloat dx,
CGFloat dy
);
 
// Determine whether two rectangles are intersecting
Bool CGRectIntersectsRect (
CGRect rect1,
CGRect rect2
);
 
// The initial value is 0.
Const CGPoint CGPointZero;
Const CGRect CGRectZero;
Const CGSize CGSizeZero;
 
// Create a CGPoint
CGPoint CGPointMake (
CGFloat x,
CGFloat y
);
// Create CGRect
CGRect CGRectMake (
CGFloat x,
CGFloat y,
CGFloat width,
CGFloat height
);
// Create CGSize
CGSize CGSizeMake (
CGFloat width,
CGFloat height
);

Affine Transformation

 

C code CGAffineTransform form = CGAffineTransformMakeRotation (PI );
Myview. transform = form;

Restore

 

C code myview. transform = CGAffineTransformIdentity;

Directly set the center of the View

 

C code myview. center = CGPointMake (100,200 );

Center

 

C code CGRectGetMinX
CGRectGetMinY
// The median of X
CGRectGetMidX
// The median of Y
CGRectGetMidY
CGRectGetMaxX
CGRectGetMaxY

Timer

 

C code NSTime * timer = [NSTimer scheduledTimerWithTimeInterval: 0.1f target: self selector: @ selector (move :) userInfo: nil repeats: YES];

Define view boundaries

C code typedef struct UIEdgeInsets {
CGFloat top, left, bottom, right; // specify amount to inset (positive) for each of the edges. values can be negative to 'outset'
} UIEdgeInsets;
// Eg
UIEdgeInsets insets = UIEdgeInsetsMake (5, 5, 5 );
CGRect innerRect = UIEdgeInsetsInsetRect ([aView bounds], insets );
CGRect subRect = CGRectInset (innerRect, self. frame. size. width/2.0f, self. frame. size. height/2.0f );

Affine transform supplement

// Create CGAffineTransform

C code // angle is better rotated between 0-2 * PI
CGAffineTransform transform = CGAffineTransformMakeRotation (angle );
// Zoom
CGAffineTransform transform = CGAffineTransformMakeScale (0.5f, 0.5f );
// Change the location
CGAffineTransform transform = CGAffineTransformMakeTranslation (50, 60 );
 
// Modify CGAffineTransform
// Modify Scaling
CGAffineTransform scaled = CGAffineTransformScale (transform, degree, degree );
// Modify the location
CGAffineTransform transform = CGAffineTransformTranslate (
CGAffineTransform t,
CGFloat tx,
CGFloat ty
);
 
// Modify the angle
CGAffineTransform transform = CGAffineTransformRotate (
CGAffineTransform t,
CGFloat angle
);
// Finally set to VIEW
[Self. view setTransform: scaled];
 
Create a UIView animation Block

// Create CGContextRef first

C code CGContextRef context = UIGraphicsGetCurrentContext ();
// Mark the start of the animation
[UIView beginAnimations: nil context: context];
// Define the animation acceleration or deceleration Mode
[UIView setAnimationCurve: UIViewAnimationCurveEaseInOut];
// Define the animation duration for 1 second
[UIView setAnimationDuration: 1.0];
// Intermediate processing of location change, size change, rotation, and so on
[[Self. view viewWithTag: 999] setAlpha: 1.0f];
// Indicates that the animation block ends.
[UIView commitAnimations];
// You can also set the callback.
[UIView setAnimationDelegate: self];
// Set the callback call Method
[UIView setAnimationDidStopSelector: @ selector (animationFinished :)];

View flip

 

C code UIView * whiteBackdrop = [self. view viewWithTag: 100];
// Choose left or right flip select left or right flip
If ([(UISegmentedControl *) self. navigationItem. titleView selectedSegmentIndex]) {
[UIView setAnimationTransition: UIViewAnimationTransitionFlipFromLeft forView: whiteBackdrop cache: YES];
} Else {
[UIView setAnimationTransition: UIViewAnimationTransitionFlipFromRight forView: whiteBackdrop cache: YES];
}
NSInteger purple = [[whiteBackdrop subviews] indexOfObject: [whiteBackdrop viewWithTag: 999];
NSInteger maroon = [[whiteBackdrop subviews] indexOfObject: [whiteBackdrop viewWithTag: 998];
// Exchange view
[WhiteBackdrop exchangeSubviewAtIndex: purple withSubviewAtIndex: maroon];
 
// There are two types of flip-up and flip-down:
Typedef enum {
// No Effect
UIViewAnimationTransitionNone,
UIViewAnimationTransitionFlipFromLeft,
UIViewAnimationTransitionFlipFromRight,
UIViewAnimationTransitionCurlUp,
UIViewAnimationTransitionCurlDown,
} UIViewAnimationTransition;

Use QuartzCore for animation

 

C code // create CATransition
CATransition * animation = [CATransition animation];
// Set proxy
Animation. delegate = self;
// Set the animation transition time
Animation. duration = 4.0f;
// Define the animation acceleration or deceleration Mode
Animation. timingFunction = UIViewAnimationCurveEaseInOut;
// Animation. type indicates the type of transition, such as Fade, MoveIn, Push, and Reveal.
Switch ([(UISegmentedControl *) self. navigationItem. titleView selectedSegmentIndex]) {
Case 0:
Animation. type = kCATransitionFade;
Break;
Case 1:
Animation. type = kCATransitionMoveIn;
Break;
Case 2:
Animation. type = kCATransitionPush;
Break;
Case 3:
Animation. type = kCATransitionReveal;
Default:
Break;
}
// Set the gradient direction.
If (isLeft)
Animation. subtype = kCATransitionFromRight;
Else
Animation. subtype = kCATransitionFromLeft;
 
// Perform the animation
UIView * whitebg = [self. view viewWithTag: 10];
NSInteger purple = [[whitebg subviews] indexOfObject: [whitebg viewWithTag: 99];
NSInteger white = [[whitebg subviews] indexOfObject: [whitebg viewWithTag: 100];
[Whitebg exchangeSubviewAtIndex: purple withSubviewAtIndex: white];
[[Whitebg layer] addAnimation: animation forKey: @ "animation"];
 
Animation. type can also be assigned with the following values:

 

C code switch (theButton. tag ){
Case 0:
Animation. type = @ "cube ";
Break;
Case 1:
Animation. type = @ "suckEffect ";
Break;
Case 2:
Animation. type = @ "oglFlip ";
Break;
Case 3:
Animation. type = @ "rippleEffect ";
Break;
Case 4:
Animation. type = @ "pageCurl ";
Break;
Case 5:
Animation. type = @ "pageUnCurl ";
Break;
Case 6:
Animation. type = @ "cameraIrisHollowOpen ";
Break;
Case 7:
Animation. type = @ "cameraIrisHollowClose ";
Break;
Default:
Break;
}

 

Sleep

 

C code [NSThread sleepUntilDate: [NSDate dateWithTimeIntervalSinceNow: 1.0f];
 
A simple animation made from images

 

C code // Load butterfly images
NSMutableArray * bflies = [NSMutableArray array];
For (int I = 1; I <= 17; I ++ ){
[Bflies addObject: [UIImage imageWithContentsOfFile: [[NSBundle mainBundle] pathForResource: [NSString stringWithFormat: @ "bf _ % d", I] ofType: @ "png"];
}
UIImageView * butterflyView = [[UIImageView alloc] initWithFrame: CGRectMake (401_f, 3001_f, 601_f, 601_f)];
ButterflyView. tag= 300;
// Set the Animated Image
ButterflyView. animationImages = bflies;
// Set the time
ButterflyView. animationDuration = 0.75f;
[Self. view addSubview: butterflyView];
// Start the animation
[ButterflyView startAnimating];
[ButterflyView release];