IOS development-UI (1) common controls, ios development-ui controls

IOS development-UI (1) common controls, ios development-ui controls

From here on is the UI

Knowledge point:

1. Common basic IOS controls

2. UITouch

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Common basic controls

 

1. UISegmentedControl: segment controller

1) Creation Method

-(Id) initWithItems :( NSArray *) items;

The items array can contain NSString or UIImage objects.

UISegmentedControl * seg = [[UISegmentedControl alloc] initWithItems: @ [@ "Guangzhou", @ "Shenzhen", @ "Zhuhai"];

2) common attributes

Set the title/image (note that the subscript ranges from 0 ~ Segments-1)

- (void)setTitle:(NSString *)title forSegmentAtIndex:(NSUInteger)segment- (void)setImage:(UIImage *)image forSegmentAtIndex:(NSUInteger)segment[seg setImage:[UIImage imageNamed:@"refresh_30"] forSegmentAtIndex:2];

 

 

Insert title/Image

- (void)insertSegmentWithTitle:(NSString *)title               atIndex:(NSUInteger)segment       animated:(BOOL)animated- (void)insertSegmentWithImage:(UIImage *)image        atIndex:(NSUInteger)segment       animated:(BOOL)animated

 

// Insert

[Seg insertSegmentWithTitle: @ "Zhanjiang" atIndex: 3 animated: YES];

 

Removed content-(void) removeSegmentAtIndex :( NSUInteger) segment animated :( BOOL) animated-(void) removeAllSegments // remove a segment [seg removeSegmentAtIndex: 0 animated: YES]; // remove all segments [seg removeAllSegments];

 

 

Event Processing

-(Void) addTarget :( id) target

Action :( SEL) action

ForControlEvents :( UIControlEvents) controlEvents

 

3) event handling

UIControlEventValueChanged

// Add an event

// Note the event type: UIControlEventValueChanged

[Seg addTarget: self action: @ selector (segAction :) forControlEvents: UIControlEventValueChanged];

 

2. UISlider: Slider

1) Creation Method

2) common attributes

Current value

Property (nonatomic) float value

// Instantiate a UISlider

UISlider * slider = [[UISlider alloc] initWithFrame: CGRectMake (10, 80,200,100)];

 

// Set the default slider position (the default value is 0-1)

Slider. value = 0.5;

 

Minimum value

@ Property (nonatomic) float minimumValue

Maximum value

@ Property (nonatomic) float maximumValue

// Modify the maximum and minimum values

Slider. minimumValue = 10;

Slider. maximumValue = 100;

 

3) custom UI

@ Property (nonatomic, retain) UIColor * minimumTrackTintColor @ property (nonatomic, retain) UIColor * maximumTrackTintColor @ property (nonatomic, retain) UIColor * thumbTintColor // Add event [sliaddder target: self action: @ selector (sliderAction :) forControlEvents: UIControlEventValueChanged]; // you can specify the slider color. minimumTrackTintColor = [UIColor redColor]; slider. maximumTrackTintColor = [UIColor yellowColor]; slider. thumbTintColor = [UIColor purpleColor];

 

 

3. UISwitch: Switch Control

1) Creation Method

// Instantiate a UISwitch

UISwitch * swi = [UISwitch alloc] initWithFrame: CGRectMake (30, 80, 10, 10)];

 

2) common attributes

@ Property (nonatomic, retain) UIColor * onTintColor

@ Property (nonatomic, retain) UIColor * thumbTintColor

@ Property (nonatomic, getter = isOn) BOOL on

// Set the Key Color

Swi. thumbTintColor = [UIColor orangeColor];

// Open color

Swi. onTintColor = [UIColor purpleColor];

// Set the Switch Status

Swi. on = NO;

 

3) event handling

 

[Swi addTarget: self action: @ selector (swiAction :) forControlEvents: UIControlEventValueChanged];

4. UIActivityIndicatorView

1) Creation Method

-(Id) initWithActivityIndicatorStyle :( UIActivityIndicatorViewStyle) style

UIActivityIndicatorViewStyleWhiteLarge large white

UIActivityIndicatorViewStyleWhite normal size white

UIActivityIndicatorViewStyleGray normal gray

// Load the view

UIActivityIndicatorView * act = [[UIActivityIndicatorView alloc] initWithFrame: CGRectMake (30,100,200,200)];

 

Act. activityIndicatorViewStyle = UIActivityIndicatorViewStyleWhiteLarge;

 

2) common attributes

Start to rotate

-(Void) startAnimating;

Stop Rotation

-(Void) stopAnimating;

Rotating or not

-(BOOL) isAnimating;

Color

@ Property (readwrite, nonatomic, retain) UIColor * color

// Set the color

Act. color = [UIColor orangeColor];

// Enable the animation

[Act startAnimating];

// Stop the animation

[Act stopAnimating];

// Set the animation to be stopped.

Act. hidesWhenStopped = NO;

 

5. UIProgressView: progress bar

1) Creation Method

-(Id) initWithProgressViewStyle :( UIProgressViewStyle) style

UIProgressView * pro = [[UIProgressView alloc] initWithFrame: CGRectMake (30,100,200, 30)];

 

2) common attributes

@ Property (nonatomic) float progress current progress

@ Property (nonatomic, retain) UIColor * trackTintColor

@ Property (nonatomic, retain) UIColor * progressTintColor

// The default value range is 0-1.

// Set the progress

Pro. progress = 0.5;

// Completion progress color

Pro. progressTintColor = [UIColor redColor];

// The Color of the unfinished progress

Pro. trackTintColor = [UIColor greenColor];

 

Exercise: Simulate the progress reading status

 

6. UIActionSheet

Proxy Method

// Instantiate a UIActionSheet * sheet = [[UIActionSheet alloc] initWithTitle: @ "tip" delegate: self cancelButtonTitle: @ "cancel" destructiveButtonTitle: @ "dinner" tip: @ "shopping", @ "playing games", @ "sleeping", nil]; // display UIActionSheet [sheet showInView: self. view];-(void) actionSheet :( UIActionSheet *) actionSheet clickedButtonAtIndex :( NSInteger) buttonIndex // click the callback proxy method-(void) actionSheet :( UIActionSheet *) actionSheet clickedButtonAtIndex :( NSInteger) buttonIndex {NSLog (@ "buttonIndex = % ld", buttonIndex); switch (buttonIndex) {case 0: {NSLog (@ "");} break; default: break ;}}

 

7. UIAlertView

 

-(Void) touchesBegan :( NSSet *) touches withEvent :( UIEvent *) event {

// Instantiate a UIAlertView

UIAlertView * alert = [[UIAlertView alloc] initWithTitle: @ "tip" message: @ "insufficient balance" delegate: self cancelButtonTitle: @ "OK" otherButtonTitles: @ "rob Bank ", @ "moving bricks", @ "finding a rich woman", nil];

// Display

[Alert show];

}

 

# Pragma mark-UIAlertViewDelegate

-(Void) alertView :( UIAlertView *) alertView clickedButtonAtIndex :( NSInteger) buttonIndex {

NSLog (@ "buttonIndex = % ld", buttonIndex );

}

 

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UITouch

1. How to capture touch events

Touch start-(void) touchesBegan :( NSSet *) touches withEvent :( UIEvent *) event; move-(void) touchesMoved :( NSSet *) touches withEvent :( UIEvent *) event; touch finish-(void) touchesEnded :( NSSet *) touches withEvent :( UIEvent *) event; touch canceled (Program interrupted during touch)-(void) touchesCancelled :( NSSet *) touches withEvent :( UIEvent *) event;-(void) touchesBegan :( NSSet *) touches withEvent :( UIEvent *) event {// obtain the starting coordinate // obtain the touch point object UITouch * touch = [touches anyObject]; // convert it to the coordinate point CGPoint = [touch locationInView: self. view];}

 

 

2. How to obtain coordinate information

1) obtain the touch point

UITouch * touch = [touches anyObject]

// Obtain the starting Coordinate

// Obtain the touch Point Object

UITouch * touch = [touches anyObject];

 

2) convert to coordinate point

[Touch locationInView: self. view]

CGPoint point = [touch locationInView: self. view];