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ios中通过调试来使用私有api
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轉自：http://blog.csdn.net/cubepeng/article/details/11284173
OS不允許使用ios私有api，使用私有api可以獲得意想不到的效果 ，同時使用私有api是一個程序員的技術體現之一。至于怎么通過apple的審核，其實是有些辦法的，但是不屬于今天討論的范圍。私有api可以通過 dump頭文件獲得，也可以去github clone一份現成的，但是還是推薦自己去dump。但是我們今天不是討論，如何使用dump到的api，而是通過一個例子來討論如何通過查看頭文件使用 私有api。
? ? ? 我們以UITextfield為例，其實這是個比較簡單的控件，有一個藍色輸入的光標，可以在你輸入的時候隱藏或者顯示，但是并沒有給我們提供改變光標顏 色的接口，這個時候我們如果要改變光標的顏色，必然要使用私有api（或者通過比較啰嗦的辦法來做這這件事情）。
? ? ?我們首先需要dump一包頭文件，如何class-dump，不是我們今天討論的要點，現在我們貼上UITextfield的頭文件。如果你覺得很長，直接拖到最后面。
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/*???*?????Generated?by?class-dump?3.4?(64?bit).???*???*?????class-dump?is?Copyright?(C)?1997-1998,?2000-2001,?2004-2012?by?Steve?Nygard.???*/????#import?<UIKit/UIControl.h>????#import?"NSCoding.h"??#import?"UIPopoverControllerDelegate.h"??#import?"UITextInput.h"????@class?NSArray,?NSAttributedString,?NSDictionary,?NSString,?UIButton,?UIColor,?UIFont,?UIImage,?UIImageView,?UILabel,?UITextFieldAtomBackgroundView,?UITextFieldBackgroundView,?UITextFieldBorderView,?UITextFieldLabel,?UITextInputTraits,?UITextInteractionAssistant,?UITextPosition,?UITextRange,?UIView,?_UIBaselineLayoutStrut,?_UITextServiceSession;????@interface?UITextField?:?UIControl?<UIPopoverControllerDelegate,?UITextInput,?NSCoding>??{??????NSAttributedString?*_text;??????UIColor?*_textColor;??????int?_borderStyle;??????float?_minimumFontSize;??????id?_delegate;??????UIImage?*_background;??????UIImage?*_disabledBackground;??????int?_clearButtonMode;??????UIView?*_leftView;??????int?_leftViewMode;??????UIView?*_rightView;??????int?_rightViewMode;??????UITextInputTraits?*_traits;??????UITextInputTraits?*_nonAtomTraits;??????float?_fullFontSize;??????float?_paddingLeft;??????float?_paddingTop;??????float?_paddingRight;??????float?_paddingBottom;??????NSString?*_textFont;??????struct?_NSRange?_selectionRange;??????int?_scrollXOffset;??????int?_scrollYOffset;??????float?_progress;??????NSString?*_style;??????UIButton?*_clearButton;??????struct?CGSize?_clearButtonOffset;??????struct?CGSize?_leftViewOffset;??????struct?CGSize?_rightViewOffset;??????UITextFieldBorderView?*_backgroundView;??????UITextFieldBorderView?*_disabledBackgroundView;??????UITextFieldBackgroundView?*_systemBackgroundView;??????UITextFieldLabel?*_textLabel;??????UITextFieldLabel?*_placeholderLabel;??????UITextFieldLabel?*_suffixLabel;??????UITextFieldLabel?*_prefixLabel;??????UIImageView?*_iconView;??????UILabel?*_label;??????float?_labelOffset;??????UITextInteractionAssistant?*_interactionAssistant;??????UIView?*_inputView;??????UIView?*_inputAccessoryView;??????UITextFieldAtomBackgroundView?*_atomBackgroundView;??????UIColor?*_shadowColor;??????struct?CGSize?_shadowOffset;??????float?_shadowBlur;??????struct?{??????????unsigned?int?secureTextChanged:1;??????????unsigned?int?guard:1;??????????unsigned?int?delegateRespondsToHandleKeyDown:1;??????????unsigned?int?verticallyCenterText:1;??????????unsigned?int?isAnimating:4;??????????unsigned?int?inactiveHasDimAppearance:1;??????????unsigned?int?becomesFirstResponderOnClearButtonTap:1;??????????unsigned?int?clearsOnBeginEditing:1;??????????unsigned?int?clearsPlaceholderOnBeginEditing:1;??????????unsigned?int?adjustsFontSizeToFitWidth:1;??????????unsigned?int?fieldEditorAttached:1;??????????unsigned?int?canBecomeFirstResponder:1;??????????unsigned?int?shouldSuppressShouldBeginEditing:1;??????????unsigned?int?inResignFirstResponder:1;??????????unsigned?int?undoDisabled:1;??????????unsigned?int?contentsRTL:1;??????????unsigned?int?explicitAlignment:1;??????????unsigned?int?implementsCustomDrawing:1;??????????unsigned?int?needsClearing:1;??????????unsigned?int?suppressContentChangedNotification:1;??????????unsigned?int?allowsEditingTextAttributes:1;??????????unsigned?int?usesAttributedText:1;??????????unsigned?int?backgroundViewState:2;??????????unsigned?int?clearsOnInsertion:1;??????}?_textFieldFlags;??????_UITextServiceSession?*_definitionSession;??????_UITextServiceSession?*_learnSession;??????BOOL?_deferringBecomeFirstResponder;??????BOOL?_avoidBecomeFirstResponder;??????BOOL?_setSelectionRangeAfterFieldEditorIsAttached;??????NSArray?*_baselineLayoutConstraints;??????_UIBaselineLayoutStrut?*_baselineLayoutLabel;??}????@property(retain)?UIView?*inputView;?//?@synthesize?inputView=_inputView;??@property(nonatomic)?int?rightViewMode;?//?@synthesize?rightViewMode=_rightViewMode;??@property(retain,?nonatomic)?UIView?*rightView;?//?@synthesize?rightView=_rightView;??@property(nonatomic)?int?leftViewMode;?//?@synthesize?leftViewMode=_leftViewMode;??@property(retain,?nonatomic)?UIView?*leftView;?//?@synthesize?leftView=_leftView;??@property(nonatomic)?int?clearButtonMode;?//?@synthesize?clearButtonMode=_clearButtonMode;??@property(retain,?nonatomic)?UIImage?*disabledBackground;?//?@synthesize?disabledBackground=_disabledBackground;??@property(retain,?nonatomic)?UIImage?*background;?//?@synthesize?background=_background;??@property(nonatomic)?id?<UITextFieldDelegate>?delegate;?//?@synthesize?delegate=_delegate;??@property(nonatomic)?float?minimumFontSize;?//?@synthesize?minimumFontSize=_minimumFontSize;??@property(nonatomic)?int?borderStyle;?//?@synthesize?borderStyle=_borderStyle;??@property(retain,?nonatomic,?setter=_setBaselineLayoutLabel:)?_UIBaselineLayoutStrut?*_baselineLayoutLabel;?//?@synthesize?_baselineLayoutLabel;??@property(copy,?nonatomic,?setter=_setBaselineLayoutConstraints:)?NSArray?*_baselineLayoutConstraints;?//?@synthesize?_baselineLayoutConstraints;??-?(void)setSelectionGranularity:(int)arg1;??-?(int)selectionGranularity;??-?(id)_findWebViewWordBoundaryFromPosition:(id)arg1;??@property(nonatomic)?int?selectionAffinity;??-?(id)characterRangeAtPoint:(struct?CGPoint)arg1;??-?(id)closestPositionToPoint:(struct?CGPoint)arg1?withinRange:(id)arg2;??-?(id)closestPositionToPoint:(struct?CGPoint)arg1;??-?(struct?CGRect)caretRectForPosition:(id)arg1;??-?(struct?CGRect)firstRectForRange:(id)arg1;??-?(void)setBaseWritingDirection:(int)arg1?forRange:(id)arg2;??-?(int)baseWritingDirectionForPosition:(id)arg1?inDirection:(int)arg2;??-?(id)characterRangeByExtendingPosition:(id)arg1?inDirection:(int)arg2;??-?(id)positionWithinRange:(id)arg1?farthestInDirection:(int)arg2;??@property(readonly,?nonatomic)?id?<UITextInputTokenizer>?tokenizer;??@property(nonatomic)?id?<UITextInputDelegate>?inputDelegate;??-?(int)offsetFromPosition:(id)arg1?toPosition:(id)arg2;??-?(int)comparePosition:(id)arg1?toPosition:(id)arg2;??-?(id)positionFromPosition:(id)arg1?inDirection:(int)arg2?offset:(int)arg3;??-?(id)positionFromPosition:(id)arg1?offset:(int)arg2;??-?(id)textRangeFromPosition:(id)arg1?toPosition:(id)arg2;??@property(readonly,?nonatomic)?UITextPosition?*endOfDocument;??@property(readonly,?nonatomic)?UITextPosition?*beginningOfDocument;??-?(void)unmarkText;??-?(void)setMarkedText:(id)arg1?selectedRange:(struct?_NSRange)arg2;??@property(copy,?nonatomic)?NSDictionary?*markedTextStyle;??@property(readonly,?nonatomic)?UITextRange?*markedTextRange;??@property(copy)?UITextRange?*selectedTextRange;??-?(void)replaceRange:(id)arg1?withText:(id)arg2;??-?(id)textInRange:(id)arg1;??-?(BOOL)hasText;??-?(id)metadataDictionariesForDictationResults;??-?(struct?CGRect)frameForDictationResultPlaceholder:(id)arg1;??-?(void)removeDictationResultPlaceholder:(id)arg1?willInsertResult:(BOOL)arg2;??-?(id)insertDictationResultPlaceholder;??-?(void)insertDictationResult:(id)arg1?withCorrectionIdentifier:(id)arg2;??-?(void)insertText:(id)arg1;??-?(void)deleteBackward;??-?(id)_proxyTextInput;??-?(BOOL)canPerformAction:(SEL)arg1?withSender:(id)arg2;??-?(BOOL)inPopover;??-?(void)_promptForReplace:(id)arg1;??-?(void)replace:(id)arg1;??-?(void)_showTextStyleOptions:(id)arg1;??-?(void)toggleUnderline:(id)arg1;??-?(void)toggleItalics:(id)arg1;??-?(void)toggleBoldface:(id)arg1;??-?(void)makeTextWritingDirectionLeftToRight:(id)arg1;??-?(void)makeTextWritingDirectionRightToLeft:(id)arg1;??-?(void)selectAll:(id)arg1;??-?(void)select:(id)arg1;??-?(void)paste:(id)arg1;??-?(void)_addShortcut:(id)arg1;??-?(void)_selectionMayChange:(id)arg1;??-?(BOOL)_isDisplayingReferenceLibraryViewController;??-?(void)_define:(id)arg1;??-?(void)copy:(id)arg1;??-?(void)cut:(id)arg1;??-?(id)webView;??-?(struct?CGPoint)constrainedPoint:(struct?CGPoint)arg1;??-?(unsigned?int)offsetInMarkedTextForSelection:(id)arg1;??-?(struct?CGRect)closestCaretRectInMarkedTextRangeForPoint:(struct?CGPoint)arg1;??-?(id)selectedAttributedText;??-?(id)selectedText;??-?(id)selectionRectsForRange:(id)arg1;??-?(struct?CGRect)_selectionClipRect;??-?(id)interactionAssistant;??-?(id)selectionView;??-?(void)cancelAutoscroll;??-?(void)startAutoscroll:(struct?CGPoint)arg1;??-?(BOOL)hasSelection;??-?(id)_fieldEditor;??-?(void)endSelectionChange;??-?(void)beginSelectionChange;??-?(BOOL)isEditable;??-?(id)undoManager;??-?(int)atomStyle;??-?(void)setAtomStyle:(int)arg1;??-?(BOOL)drawsAsAtom;??-?(void)setDrawsAsAtom:(BOOL)arg1;??-?(void)setClearButtonOffset:(struct?CGSize)arg1;??-?(void)_clearButtonClicked:(id)arg1;??-?(BOOL)isUndoEnabled;??-?(void)setUndoEnabled:(BOOL)arg1;??-?(void)setTextCentersVertically:(BOOL)arg1;??-?(void)setTextCentersHorizontally:(BOOL)arg1;??-?(void)setLabel:(id)arg1;??-?(id)textLabel;??-?(void)setLabelOffset:(float)arg1;??-?(BOOL)hasMarkedText;??-?(void)setProgress:(float)arg1;??-?(struct?CGRect)iconRect;??-?(void)setBecomesFirstResponderOnClearButtonTap:(BOOL)arg1;??-?(struct?CGSize)clearButtonOffset;??-?(void)setIcon:(id)arg1;??-?(unsigned?int)characterOffsetAtPoint:(struct?CGPoint)arg1;??-?(void)setSelectionRange:(struct?_NSRange)arg1;??-?(struct?_NSRange)selectionRange;??-?(void)clearText;??-?(void)layoutTilesNow;??-?(void)_resetSelectionUI;??-?(void)_clearSelectionUI;??-?(void)selectAll;??-?(void)setEnabled:(BOOL)arg1;??-?(void)_setEnabled:(BOOL)arg1?animated:(BOOL)arg2;??-?(void)setInactiveHasDimAppearance:(BOOL)arg1;??-?(void)setTextFont:(id)arg1;??-?(float)paddingRight;??-?(void)setPaddingRight:(float)arg1;??-?(float)paddingBottom;??-?(void)setPaddingBottom:(float)arg1;??-?(float)paddingTop;??-?(void)setPaddingTop:(float)arg1;??-?(float)paddingLeft;??-?(void)setPaddingLeft:(float)arg1;??-?(void)setPaddingTop:(float)arg1?paddingLeft:(float)arg2;??-?(void)drawBorder:(struct?CGRect)arg1;??-?(void)drawRect:(struct?CGRect)arg1;??-?(BOOL)_canDrawContent;??-?(BOOL)_implementsCustomDrawing;??-?(struct?CGRect)editRect;??-?(struct?CGRect)textRect;??-?(struct?CGRect)clearButtonRect;??-?(void)setClearButtonStyle:(int)arg1;??-?(void)setTextAutorresizesToFit:(BOOL)arg1;??-?(void)setAutoresizesTextToFit:(BOOL)arg1;??-?(id)documentFragmentForPasteboardItemAtIndex:(int)arg1;??-?(id)_dictationInterpretations;??-?(id)supportedPasteboardTypesForCurrentSelection;??-?(BOOL)fieldEditor:(id)arg1?shouldReplaceWithText:(id)arg2;??-?(BOOL)fieldEditor:(id)arg1?shouldInsertText:(id)arg2?replacingRange:(struct?_NSRange)arg3;??-?(void)fieldEditorDidChangeSelection:(id)arg1;??-?(struct?_NSRange)fieldEditor:(id)arg1?willChangeSelectionFromCharacterRange:(struct?_NSRange)arg2?toCharacterRange:(struct?_NSRange)arg3;??-?(void)selectAllFromFieldEditor:(id)arg1;??-?(void)fieldEditorDidChange:(id)arg1;??-?(id)customOverlayContainer;??-?(void)keyboardInputChangedSelection:(id)arg1;??-?(BOOL)keyboardInputChanged:(id)arg1;??-?(BOOL)keyboardInputShouldDelete:(id)arg1;??-?(BOOL)keyboardInput:(id)arg1?shouldReplaceTextInRange:(struct?_NSRange)arg2?replacementText:(id)arg3;??-?(BOOL)keyboardInput:(id)arg1?shouldInsertText:(id)arg2?isMarkedText:(BOOL)arg3;??-?(void)_applicationResuming:(id)arg1;??-?(void)willDetachFieldEditor:(id)arg1;??-?(void)attachFieldEditor:(id)arg1;??-?(void)willAttachFieldEditor:(id)arg1;??-?(void)_drawTextInRect:(struct?CGRect)arg1?forLabel:(id)arg2;??-?(void)drawPrefixInRect:(struct?CGRect)arg1;??-?(void)drawSuffixInRect:(struct?CGRect)arg1;??-?(void)drawPlaceholderInRect:(struct?CGRect)arg1;??-?(void)drawTextInRect:(struct?CGRect)arg1;??-?(struct?CGRect)rightViewRectForBounds:(struct?CGRect)arg1;??-?(struct?CGRect)leftViewRectForBounds:(struct?CGRect)arg1;??-?(struct?CGRect)_baselineLeftViewRectForBounds:(struct?CGRect)arg1;??-?(struct?CGRect)clearButtonRectForBounds:(struct?CGRect)arg1;??-?(struct?CGRect)editingRectForBounds:(struct?CGRect)arg1;??-?(struct?CGRect)placeholderRectForBounds:(struct?CGRect)arg1;??-?(struct?CGRect)textRectForBounds:(struct?CGRect)arg1;??-?(struct?CGRect)borderRectForBounds:(struct?CGRect)arg1;??@property(retain)?UIView?*inputAccessoryView;??@property(readonly,?nonatomic,?getter=isEditing)?BOOL?editing;??-?(id)backgroundColor;??-?(void)setBackgroundColor:(id)arg1;??@property(copy,?nonatomic)?NSDictionary?*typingAttributes;??@property(nonatomic)?BOOL?allowsEditingTextAttributes;??@property(nonatomic)?BOOL?adjustsFontSizeToFitWidth;??-?(void)setClearsPlaceholderOnBeginEditing:(BOOL)arg1;??-?(BOOL)clearsPlaceholderOnBeginEditing;??@property(nonatomic)?BOOL?clearsOnBeginEditing;??-?(void)_setPrefix:(id)arg1;??-?(void)_setSuffix:(id)arg1?withColor:(id)arg2;??@property(copy,?nonatomic)?NSAttributedString?*attributedPlaceholder;??@property(copy,?nonatomic)?NSString?*placeholder;??-?(void)createPlaceholderIfNecessary;??-?(void)finishedSettingPlaceholder;??-?(id)createTextLabelWithTextColor:(id)arg1;??-?(void)_createBaselineLayoutLabelIfNecessary;??-?(id)createPlaceholderLabelWithFont:(id)arg1?andTextAlignment:(int)arg2;??-?(void)setContentVerticalAlignment:(int)arg1;??@property(nonatomic)?int?textAlignment;??@property(retain,?nonatomic)?UIFont?*font;??-?(void)disableClearsOnInsertion;??@property(nonatomic)?BOOL?clearsOnInsertion;??-?(float)shadowBlur;??-?(void)setShadowBlur:(float)arg1;??-?(struct?CGSize)shadowOffset;??-?(void)setShadowOffset:(struct?CGSize)arg1;??-?(id)shadowColor;??-?(void)setShadowColor:(id)arg1;??@property(retain,?nonatomic)?UIColor?*textColor;??-?(void)_updateTextColor;??@property(copy,?nonatomic)?NSAttributedString?*attributedText;??-?(void)_setAttributedText:(id)arg1?onFieldEditorAndSetCaretSelectionAfterText:(BOOL)arg2;??-?(void)_transferTextFieldPropertiesFromText:(id)arg1;??-?(void)_transferAttribute:(id)arg1?fromString:(id)arg2?andSetPropertyWith:(SEL)arg3?usingValueClass:(Class)arg4;??@property(copy,?nonatomic)?NSString?*text;??-?(void)finishedSettingTextOrAttributedText;??-?(id)searchText;??-?(BOOL)_hasContent;??-?(id)_attributedText;??-?(id)_text;??@property(nonatomic,?getter=isSecureTextEntry)?BOOL?secureTextEntry;?//?@dynamic?secureTextEntry;??-?(void)_updateTextLabel;??-?(BOOL)respondsToSelector:(SEL)arg1;??-?(id)methodSignatureForSelector:(SEL)arg1;??-?(void)forwardInvocation:(id)arg1;??-?(id)textInputTraits;??-?(BOOL)_shouldSendContentChangedNotificationsIfOnlyMarkedTextChanged;??-?(id)_textLabelView;??-?(id)_placeholderLabel;??-?(id)_placeholderView;??-?(id)_placeholderColor;??-?(void)_setSystemBackgroundViewActive:(BOOL)arg1;??-?(BOOL)_fieldEditorAttached;??-?(Class)_systemBackgroundViewClass;??-?(void)_setRightViewOffset:(struct?CGSize)arg1;??-?(struct?CGSize)_rightViewOffset;??-?(void)_setLeftViewOffset:(struct?CGSize)arg1;??-?(struct?CGSize)_leftViewOffset;??-?(struct?CGPoint)_scrollOffset;??-?(id)actualFont;??-?(float)actualMinimumFontSize;??-?(struct?CGRect)adjustedCaretRectForCaretRect:(struct?CGRect)arg1;??-?(void)_updateRTLStateForText:(id)arg1?updateAlignment:(BOOL)arg2;??-?(void)_setImplicitAlignment;??-?(void)_clearBackgroundViews;??-?(void)_updateBackgroundViewsAnimated:(BOOL)arg1;??-?(BOOL)_shouldEndEditing;??-?(void)layoutSubviews;??-?(struct?CGRect)_prefixFrame;??-?(struct?CGRect)_suffixFrame;??-?(void)updateConstraints;??-?(void)_setUpBaselineLayoutConstraints;??-?(struct?CGRect)_frameForLabel:(id)arg1?inTextRect:(struct?CGRect)arg2;??-?(void)_updateLabel;??-?(struct?CGRect)_textRectExcludingButtonsForBounds:(struct?CGRect)arg1;??-?(struct?CGRect)_textRectForBounds:(struct?CGRect)arg1?forEditing:(BOOL)arg2;??-?(BOOL)_isShowingPrefix;??-?(BOOL)_isShowingPlaceholder;??-?(BOOL)_showsRightView;??-?(BOOL)_showsLeftView;??-?(BOOL)_showsClearButtonWhenEmpty;??-?(BOOL)_showsClearButton:(BOOL)arg1;??-?(BOOL)_showsClearButtonWhenNonEmpty:(BOOL)arg1;??-?(void)_updateAtomBackground;??-?(BOOL)_showsAtomBackground;??-?(BOOL)_partsShouldBeMini;??-?(BOOL)_heightShouldBeMini;??-?(struct?CGRect)_atomBackgroundViewFrame;??-?(void)_updateAutosizeStyleIfNeeded;??-?(void)_updateButtons;??-?(id)_clearButton;??-?(id)clearButton;??-?(id)_clearButtonImageForState:(unsigned?int)arg1;??-?(void)_endedEditing;??-?(id)_style;??-?(id)_createCSSStyleDeclarationForWebView:(id)arg1;??-?(float)_marginTop;??-?(id)_copyFont:(id)arg1?newSize:(float)arg2?maxSize:(float)arg3;??-?(void)setFont:(id)arg1?fullFontSize:(float)arg2;??-?(id)hitTest:(struct?CGPoint)arg1?withEvent:(id)arg2;??-?(void)touchesEnded:(id)arg1?withEvent:(id)arg2;??-?(void)touchesCancelled:(id)arg1?withEvent:(id)arg2;??-?(void)_resignFirstResponder;??-?(void)_windowBecameKey;??-?(BOOL)resignFirstResponder;??-?(void)_removeShortcutController;??-?(void)_removeDefinitionController;??-?(void)_becomeFirstResponder;??-?(void)_updatePlaceholderPosition;??-?(int)_currentTextAlignment;??-?(void)__resumeBecomeFirstResponder;??-?(void)_becomeFirstResponderAndMakeVisible;??-?(BOOL)_requiresKeyboardResetOnReload;??-?(id)_keyboardResponder;??-?(BOOL)canResignFirstResponder;??-?(BOOL)canBecomeFirstResponder;??-?(struct?CGSize)sizeThatFits:(struct?CGSize)arg1;??-?(struct?CGSize)_intrinsicSizeWithinSize:(struct?CGSize)arg1;??-?(id)viewForBaselineLayout;??-?(struct?CGSize)_textSize;??-?(struct?CGSize)_textSizeUsingFullFontSize:(BOOL)arg1;??-?(void)setAnimating:(BOOL)arg1;??-?(void)setBounds:(struct?CGRect)arg1;??-?(void)setFrame:(struct?CGRect)arg1;??-?(void)_sizeChanged:(BOOL)arg1;??-?(void)_setNeedsStyleRecalc;??-?(void)_clearStyle;??-?(void)dealloc;??-?(void)_encodeBackgroundColorWithCoder:(id)arg1;??-?(void)encodeWithCoder:(id)arg1;??-?(void)_populateArchivedSubviews:(id)arg1;??-?(id)initWithCoder:(id)arg1;??-?(id)initWithFrame:(struct?CGRect)arg1;??-?(void)_invalidateBaselineLayoutConstraints;??-?(id)_scriptingInfo;??-?(void)decodeRestorableStateWithCoder:(id)arg1;??-?(void)encodeRestorableStateWithCoder:(id)arg1;??-?(BOOL)isElementAccessibilityExposedToInterfaceBuilder;??-?(BOOL)isAccessibilityElementByDefault;????//?Remaining?properties??@property(nonatomic)?int?autocapitalizationType;?//?@dynamic?autocapitalizationType;??@property(nonatomic)?int?autocorrectionType;?//?@dynamic?autocorrectionType;??@property(nonatomic)?BOOL?enablesReturnKeyAutomatically;?//?@dynamic?enablesReturnKeyAutomatically;??@property(nonatomic)?int?keyboardAppearance;?//?@dynamic?keyboardAppearance;??@property(nonatomic)?int?keyboardType;?//?@dynamic?keyboardType;??@property(nonatomic)?int?returnKeyType;?//?@dynamic?returnKeyType;??@property(nonatomic)?int?spellCheckingType;?//?@dynamic?spellCheckingType;??@property(readonly,?nonatomic)?UIView?*textInputView;????@end??
首先我們看它聲明的方法，關于cursor 的函數，或者表示類似顏色設置的函數，一看之下，沒有。這個時候我們注意到有一個函數是?- (id)textInputTraits;
字面意思上是文本輸入特征的意思，這個很有可能是我們需要的設置光標的顏色，ok，現在我們開始寫代碼。
省略創建project的步驟，直接上代碼
我們看到private 下面，有一行是標識color的，很可能這個就是我們找的光標樣色的屬性。同樣我們看一下 UITextfieldTraits的頭文件，找到我們需要調用的函數。
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/*???*?????Generated?by?class-dump?3.4?(64?bit).???*???*?????class-dump?is?Copyright?(C)?1997-1998,?2000-2001,?2004-2012?by?Steve?Nygard.???*/????#import?"NSObject.h"????#import?"NSCopying.h"??#import?"UITextInputTraits.h"??#import?"UITextInputTraits_Private.h"????@class?UIColor,?UIImage;????@interface?UITextInputTraits?:?NSObject?<UITextInputTraits,?UITextInputTraits_Private,?NSCopying>??{??????int?autocapitalizationType;??????int?autocorrectionType;??????int?spellCheckingType;??????unsigned?int?keyboardType:8;??????unsigned?int?keyboardAppearance:8;??????int?returnKeyType;??????BOOL?enablesReturnKeyAutomatically;??????BOOL?secureTextEntry;??????struct?__CFCharacterSet?*textTrimmingSet;??????UIColor?*insertionPointColor;??????UIColor?*selectionBarColor;??????UIColor?*selectionHighlightColor;??????UIImage?*selectionDragDotImage;??????unsigned?int?insertionPointWidth;??????int?textLoupeVisibility;??????int?textSelectionBehavior;??????id?textSuggestionDelegate;??????BOOL?contentsIsSingleValue;??????BOOL?acceptsEmoji;??????BOOL?returnKeyGoesToNextResponder;??????BOOL?acceptsFloatingKeyboard;??????BOOL?acceptsSplitKeyboard;??????BOOL?displaySecureTextUsingPlainText;??????BOOL?learnsCorrections;??????int?emptyContentReturnKeyType;??????int?shortcutConversionType;??????BOOL?suppressReturnKeyStyling;??????BOOL?forceEnableDictation;??????BOOL?useInterfaceLanguageForLocalization;??????BOOL?deferBecomingResponder;??}????+?(BOOL)keyboardTypeRequiresASCIICapable:(int)arg1;??+?(id)traitsByAdoptingTraits:(id)arg1;??+?(id)defaultTextInputTraits;??@property(nonatomic)?BOOL?deferBecomingResponder;?//?@synthesize?deferBecomingResponder;??@property(nonatomic)?BOOL?useInterfaceLanguageForLocalization;?//?@synthesize?useInterfaceLanguageForLocalization;??@property(nonatomic)?BOOL?forceEnableDictation;?//?@synthesize?forceEnableDictation;??@property(nonatomic)?BOOL?suppressReturnKeyStyling;?//?@synthesize?suppressReturnKeyStyling;??@property(nonatomic)?int?shortcutConversionType;?//?@synthesize?shortcutConversionType;??@property(nonatomic)?BOOL?learnsCorrections;?//?@synthesize?learnsCorrections;??@property(nonatomic)?BOOL?displaySecureTextUsingPlainText;?//?@synthesize?displaySecureTextUsingPlainText;??@property(nonatomic)?BOOL?acceptsSplitKeyboard;?//?@synthesize?acceptsSplitKeyboard;??@property(nonatomic)?BOOL?acceptsFloatingKeyboard;?//?@synthesize?acceptsFloatingKeyboard;??@property(nonatomic)?BOOL?returnKeyGoesToNextResponder;?//?@synthesize?returnKeyGoesToNextResponder;??@property(nonatomic)?int?emptyContentReturnKeyType;?//?@synthesize?emptyContentReturnKeyType;??@property(nonatomic)?BOOL?acceptsEmoji;?//?@synthesize?acceptsEmoji;??@property(nonatomic)?BOOL?contentsIsSingleValue;?//?@synthesize?contentsIsSingleValue;??@property(nonatomic)?int?textSelectionBehavior;?//?@synthesize?textSelectionBehavior;??@property(nonatomic)?int?textLoupeVisibility;?//?@synthesize?textLoupeVisibility;??@property(nonatomic)?unsigned?int?insertionPointWidth;?//?@synthesize?insertionPointWidth;??@property(retain,?nonatomic)?UIImage?*selectionDragDotImage;?//?@synthesize?selectionDragDotImage;??@property(retain,?nonatomic)?UIColor?*selectionHighlightColor;?//?@synthesize?selectionHighlightColor;??@property(retain,?nonatomic)?UIColor?*selectionBarColor;?//?@synthesize?selectionBarColor;??@property(retain,?nonatomic)?UIColor?*insertionPointColor;?//?@synthesize?insertionPointColor;??@property(nonatomic,?getter=isSecureTextEntry)?BOOL?secureTextEntry;?//?@synthesize?secureTextEntry;??@property(nonatomic)?BOOL?enablesReturnKeyAutomatically;?//?@synthesize?enablesReturnKeyAutomatically;??@property(nonatomic)?int?returnKeyType;?//?@synthesize?returnKeyType;??@property(nonatomic)?int?keyboardAppearance;?//?@synthesize?keyboardAppearance;??@property(nonatomic)?int?keyboardType;?//?@synthesize?keyboardType;??@property(nonatomic)?int?spellCheckingType;?//?@synthesize?spellCheckingType;??@property(nonatomic)?int?autocorrectionType;?//?@synthesize?autocorrectionType;??@property(nonatomic)?int?autocapitalizationType;?//?@synthesize?autocapitalizationType;??-?(BOOL)isEqual:(id)arg1;??-?(id)description;??-?(id)copyWithZone:(struct?_NSZone?*)arg1;??-?(void)takeTraitsFrom:(id)arg1;??-?(void)setToDefaultValues;??-?(void)dealloc;??-?(id)init;??@property(nonatomic)?id?textSuggestionDelegate;?//?@dynamic?textSuggestionDelegate;??@property(nonatomic)?struct?__CFCharacterSet?*textTrimmingSet;?//?@dynamic?textTrimmingSet;??-?(id)dictionaryRepresentation;??-?(void)setToSecureValues;????@end??
我們找到一個property ：?insertionPointColor，字面意思上基本上確定這個就是我們要找的設置光標的函數。
經過嘗試果然如此，現在貼上結果
各位看官，這次的關于私有api的分析就結束了，其實整個過程沒這么順利，只是我省掉了一些，本身這個做法我也沒有用到項目中，而是選擇一個開源的 項目，但是對于私有api的熟悉也體現一個程序員對于apple這套東西的熟悉，同時我們可以模仿私有的實現，做一些事情，但是不推薦大家直接使用私有 api。
轉載于:https://www.cnblogs.com/frounk/p/4708815.html
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