1. Image View
// Find the image
UIImage * pImage = [UIImage imageNamed: @ "sea.png"];
// Create an ImageView Based on the Content Image
Self. pImageView = [[UIImageView alloc] initWithImage: pImage];
// Place the ImageView to the parent View
[Self. view insertSubview: self. pImageView atIndex: 0];
2. Label
// Create a label
UILabel * pLabel = [[UILabel alloc] initWithFrame: CGRectMake (10, 10,120, 50)];
// Add content
PLabel. text = @ "HelloWorld \ nSecondLine ";
// Set the font and size
PLabel. font = [UIFont fontWithName: @ "Verdana" size: 18];
// Font alignment
PLabel. textAlignment = NSTextAlignmentCenter;
// Font color
PLabel. textColor = [UIColor redColor];
// Display the number of rows
PLabel. numberOfLines = 2;
// Shadow color
PLabel. shadowColor = [UIColor blackColor];
// Shadow size
PLabel. shadowOffset = CGSizeMake (2.0, 1.0 );
// Set the background color of the label to transparent.
PLabel. backgroundColor = [UIColor clearColor];
[Self. view addSubview: pLabel];
[PLabel release];
3. TextField
// Create TextField
UITextField * pTextField = [[UITextField alloc] initWithFrame: CGRectMake (10,116,200, 31)];
// Set the border Style
PTextField. borderStyle = UITextBorderStyleRoundedRect;
// Set the font
PTextField. font = [UIFont systemFontOfSize: 18.0];
// Change the font according to the width
PTextField. adjustsFontSizeToFitWidth = YES;
// The smallest font
PTextField. minimumFontSize = 2.0;
// Clear the button style
PTextField. clearButtonMode = UITextFieldViewModeWhileEditing;
// Pop-up keyboard Style
PTextField. keyboardType = UIKeyboardTypeDefault;
// Set the automatic correction function
PTextField. autocorrectionType = UITextAutocorrectionTypeNo;
// Set the keyboard auto-case attributes
PTextField. autocapitalizationType = UITextAutocapitalizationTypeNone;
// Set the return button type
PTextField. returnKeyType = UIReturnKeyDone;
// Set whether Password text display is supported
PTextField. secureTextEntry = YES;
// Set Delegation
PTextField. delegate = self;
[Self. view addSubview: pTextField];
[PTextField release];
The Protocol UITextFieldDelegate is required for writing the method as follows:
// Method for returning the keyboard
-(BOOL) textFieldShouldReturn :( UITextField *) textField
{
// Put the current textField to discard the first responder
[TextField resignFirstResponder];
Return YES;
}
// Touch the background and play back the keyboard as follows:
-(IBAction) backgroundTap :( id) sender {
[_ NumberField resignFirstResponder];
[_ CodeField resignFirstResponder];
}
// A Simple keyboard bounce method (touch the background)
-(Void) touchesBegan :( NSSet *) touches withEvent :( UIEvent *) event
{
[Self. textField endEditing: YES];
}
// Restrict the length of the input string
-(BOOL) textField :( UITextField *) textField shouldChangeCharactersInRange :( nsange) range replacementString :( NSString *) string
{
Int MAX_LENGTH = 10;
NSMutableString * pNewString = [NSMutableString stringWithString: textField. text];
// Complete replacement of strings in the range
[PNewString replaceCharactersInRange: range withString: string];
// Returns YES or NO based on the two lengths.
Return ([pNewString length] <= MAX_LENGTH );
}
4. Button
// Create a button
UIButton * pBtn = [UIButton buttonWithType: UIButtonTypeRoundedRect];
// Set the region
[PBtn setFrame: CGRectMake (10, 70,100, 40)];
// Set the name
[PBtn setTitle: @ "Normal" forState: UIControlStateNormal];
[PBtn setTitle: @ "HighLight" forState: UIControlStateHighlighted];
// Highlight allowed
PBtn. showsTouchWhenHighlighted = YES;
// Button call Method
[PBtn addTarget: self action: @ selector (buttonDown :) forControlEvents: UIControlEventTouchDown];
[Self. view addSubview: pBtn];
// Response method of the button
-(Void) buttonDown :( id) sender
{}
5. CheckboxButton (selected box)
// Create a custom button
UIButton * pCheckboxButton = [UIButton buttonWithType: UIButtonTypeCustom];
// Set the region
CGRect checkboxRect = CGRectMake (10,155 );
[PCheckboxButton setFrame: checkboxRect];
// Set the corresponding image for two different States respectively
[PCheckboxButton setImage: [UIImage imageNamed: @ "checkbox_off.png"] forState: UIControlStateNormal];
[PCheckboxButton setImage: [UIImage imageNamed: @ "checkbox_on.png"] forState: UIControlStateSelected];
// Add association Action
[PCheckboxButton addTarget: self action: @ selector (checkboxClick :) forControlEvents: UIControlEventTouchUpInside];
[Self. view addSubview: pCheckboxButton];
// Correlation Method
-(Void) checkboxClick :( UIButton *) btn
{
Btn. selected =! Btn. selected;
}
6. Slideer -- Slider
// Create a UISlider object
UISlider * pSlider = [[UISlider alloc] initWithFrame: CGRectMake (10,195,300, 20)];
// Set the minimum value
PSlider. minimumValue = 0;
// Maximum value
PSlider. maximumValue = 100;
// Whether sliding can continue
PSlider. continuous = YES;
// Set the Initial Value
PSlider. value = 50;
// Transparency
Self. pImageView. alpha = pSlider. value/100;
// The image at the minimum value
PSlider. minimumValueImage = [UIImage imageNamed: @ "apple_min"];
// The image at the maximum value
PSlider. maximumValueImage = [UIImage imageNamed: @ "apple_max.png"];
// Set the current image
[PSlider setThumbImage: [UIImage imageNamed: @ "apple_thumb.png"] forState: UIControlStateNormal];
// Add the corresponding action. Note: CotrolEvents: valueChanged
[PSlider addTarget: self action: @ selector (sliderValueChange :) forControlEvents: UIControlEventValueChanged];
[Self. view addSubview: pSlider];
// Create a label that displays the current value
Self. pShowValueLabel = [[UILabel alloc] initWithFrame: CGRectMake (180,150, 86, 25)];
// Set the background color
Self. pShowValueLabel. backgroundColor = [UIColor lightGrayColor];
// Set the current text content
Self. pShowValueLabel. text = [NSString stringWithFormat: @ "brightness: % d", (int) pSlider. value];
[Self. view addSubview: self. pShowValueLabel];
// Correlation Method
-(Void) sliderValueChange :( UISlider *) slider
{
// Display the current brightness
Self. pShowValueLabel. text = [NSString stringWithFormat: @ "brightness: % d", (int) slider. value];
// Transparency
Self. pImageView. alpha = slider. value/100;
}
7. Switch -- Switch
UISwitch * pSwitch = [[UISwitch alloc] initWithFrame: CGRectMake (220, 10, 10, 50)];
// Add associated actions to the switch
[PSwitch addTarget: self action: @ selector (switchMethod :) forControlEvents: UIControlEventValueChanged];
[Self. view addSubview: pSwitch];
// Correlation Method
-(Void) switchMethod :( id) sender
{
// Find the switch
UISwitch * pSwitch = (UISwitch *) sender;
If (pSwitch. isOn) // set the background image hidden Based on the switch status
{
[Self. pImageView setHidden: NO];
}
Else
{
[Self. pImageView setHidden: YES];
}
}
8. SegmentControl-segment Control
// Create an array
NSArray * pArr = [NSArray arrayWithObjects: @ "1", @ "2", nil];
// Initialize the SegmentControl object based on the array object
UISegmentedControl * Specified gment = [[UISegmentedControl alloc] initWithItems: pArr];
[Sequence gment setFrame: CGRectMake (10,240,300, 40)];
// Set the Style of the segmented Control
[Sequence gment setSegmentedControlStyle: UISegmentedControlStyleBordered];
// Set the number of segments selected by the segment Control
[Export gment setSelectedSegmentIndex: 0];
// Add association Action
[Export gment addTarget: self action: @ selector (segmentMethod :) forControlEvents: UIControlEventValueChanged];
[Self. view addSubview: Variable gment];
9. Progress -- Progress bar
// Create a progress bar and initialize it
Self. pProgress = [[UIProgressView alloc] initWithFrame: CGRectMake (10,360,300, 30)];
// Set the Style
Self. pProgress. progressViewStyle = UIProgressViewStyleBar;
// Set the unfinished color for the progress bar.
Self. pProgress. trackTintColor = [UIColor redColor];
Self. pProgress. progressTintColor = [UIColor greenColor];
[Self. view addSubview: self. pProgress];
// Create a label to display the progress
Self. pProgressValueLabel = [[UILabel alloc] initWithFrame: CGRectMake (100,370,110, 30)];
Self. pProgressValueLabel. backgroundColor = [UIColor clearColor];
Self. pProgressValueLabel. text = [NSString stringWithFormat: @ "load: %. 1f", self. progressValue * 100];
[Self. view addSubview: self. pProgressValueLabel];
// Use the timer to call the task cyclically.
PTimer = [NSTimer scheduledTimerWithTimeInterval: 1 target: self selector: @ selector (progressMethod :) userInfo: nil repeats: YES];
// Associated Method
-(Void) progressMethod :( id) sender
{
Self. progressValue ++ = 0.1;
Self. pProgress. progress = self. progressValue;
Self. pProgressValueLabel. text = [NSString stringWithFormat: @ "load: %. 1f", self. progressValue * 100];
// [Self. pActivity startAnimating];
If (self. progressValue> = 1)
{
Self. progressValue = 0;
Self. pProgressValueLabel. text = @ "loaded ";
// [Self. pActivity stopAnimating];
// Self. pActivity. hidden = NO;
// Stop the timer
[PTimer invalidate];
}
}
10. ActivityIndicatorView
// Create and initialize ActivityIndicatorView (Style)
Self. pActivity = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle: UIActivityIndicatorViewStyleWhiteLarge];
[Self. pActivity setFrame: CGRectMake (10,280, 45, 45)];
// Set whether to hide
Self. pActivity. hidden = NO;
[Self. view addSubview: self. pActivity];
// Create button to associate the corresponding method
UIButton * pBtn = [UIButton buttonWithType: UIButtonTypeRoundedRect];
[PBtn setFrame: CGRectMake (10,330,)];
[PBtn setTitle: @ "" forState: UIControlStateNormal];
[PBtn addTarget: self action: @ selector (doRotate :) forControlEvents: UIControlEventTouchUpInside];
PBtn. tag= 110;
[Self. view addSubview: pBtn];
// Associated Method
-(Void) doRotate :( id) sender
{
UIButton * pBtn = (UIButton *) sender;
[Self. pActivity isAnimating]? [Self. pActivity stopAnimating]: [self. pActivity startAnimating];
// Set the button title based on whether the Activity is running
[PBtn setTitle :( self. pActivity. isAnimating? @ "Stop": @ "") forState: UIControlStateNormal];
Self. pActivity. hidden = NO;
}
