SZTextView 不能输入中文解决方法

默认不能输入中文。

修改属性Secure Text Entry为不勾选状态即可。

SZTextView 源码如下：

//

//  SZTextView.h

//  SZTextView

//

//  Created by glaszig on 14.03.13.

//  Copyright (c) 2013 glaszig. All rights reserved.

//

#import <UIKit/UIKit.h>

@interface SZTextView :
UITextView

@property (copy,
nonatomic) NSString *placeholder;
@property (copy,
nonatomic) NSAttributedString *attributedPlaceholder;
@property (retain,
nonatomic) UIColor *placeholderTextColor
UI_APPEARANCE_SELECTOR;

@end

//

//  SZTextView.m

//  SZTextView

//

//  Created by glaszig on 14.03.13.

//  Copyright (c) 2013 glaszig. All rights reserved.

//

#import "SZTextView.h"

#define HAS_TEXT_CONTAINER [self respondsToSelector:@selector(textContainer)]

#define HAS_TEXT_CONTAINER_INSETS(x) [(x) respondsToSelector:@selector(textContainerInset)]

@interface SZTextView ()
@property (strong,
nonatomic) UITextView *_placeholderTextView;

@end

static
NSString * const kAttributedPlaceholderKey =
@"attributedPlaceholder";
static
NSString * const kPlaceholderKey =
@"placeholder";
static
NSString * const kFontKey =
@"font";
static
NSString * const kAttributedTextKey =
@"attributedText";
static
NSString * const kTextKey =
@"text";
static
NSString * const kExclusionPathsKey =
@"exclusionPaths";
static
NSString * const kLineFragmentPaddingKey =
@"lineFragmentPadding";
static
NSString * const kTextContainerInsetKey =
@"textContainerInset";
static
NSString * const kTextAlignmentKey =
@"textAlignment";

@implementation SZTextView

- (instancetype)initWithCoder:(NSCoder *)coder
{
   
self = [super
initWithCoder:coder];
   
if (self) {

        [self
preparePlaceholder];
    }

    return
self;
}

#if __IPHONE_OS_VERSION_MIN_REQUIRED >= 70000
- (instancetype)initWithFrame:(CGRect)frame textContainer:(NSTextContainer
*)textContainer
{
   
self = [super
initWithFrame:frame
textContainer:textContainer];
   
if (self) {

        [self
preparePlaceholder];
    }

    return
self;
}

#else
- (id)initWithFrame:(CGRect)frame
{
   
self = [super initWithFrame:frame];
   
if (self) {
        [self preparePlaceholder];
    }

    return
self;
}

#endif

- (void)preparePlaceholder
{
   
NSAssert(!self._placeholderTextView,
@"placeholder has been prepared already: %@",
self._placeholderTextView);

    // the label which displays the placeholder

    // needs to inherit some properties from its parent text view

    // account for standard UITextViewPadding

   
CGRect frame = self.bounds;
   
self._placeholderTextView = [[UITextView
alloc] initWithFrame:frame];

    self._placeholderTextView.opaque =
NO;

    self._placeholderTextView.backgroundColor = [UIColor
clearColor];

    self._placeholderTextView.textColor = [UIColor
lightGrayColor];

    self._placeholderTextView.textAlignment =
self.textAlignment;

    self._placeholderTextView.editable =
NO;

    self._placeholderTextView.scrollEnabled =
NO;

    self._placeholderTextView.userInteractionEnabled =
NO;

    self._placeholderTextView.font =
self.font;

    self._placeholderTextView.isAccessibilityElement =
NO;

    self._placeholderTextView.contentOffset =
self.contentOffset;

    self._placeholderTextView.contentInset =
self.contentInset;

   
if ([self._placeholderTextView
respondsToSelector:@selector(setSelectable:)]) {

        self._placeholderTextView.selectable =
NO;
    }

    if (HAS_TEXT_CONTAINER) {

        self._placeholderTextView.textContainer.exclusionPaths
= self.textContainer.exclusionPaths;

        self._placeholderTextView.textContainer.lineFragmentPadding
= self.textContainer.lineFragmentPadding;
    }

    if (HAS_TEXT_CONTAINER_INSETS(self)) {

        self._placeholderTextView.textContainerInset =
self.textContainerInset;
    }

    if (_attributedPlaceholder) {

        self._placeholderTextView.attributedText =
_attributedPlaceholder;
    }
else if (_placeholder) {

        self._placeholderTextView.text =
_placeholder;
    }

    [self
setPlaceholderVisibleForText:self.text];

    self.clipsToBounds =
YES;

    // some observations

    NSNotificationCenter *defaultCenter = [NSNotificationCenter
defaultCenter];
    [defaultCenter
addObserver:self
selector:@selector(textDidChange:)

                          name:UITextViewTextDidChangeNotification
object:self];

    [self
addObserver:self
forKeyPath:kAttributedPlaceholderKey

              options:NSKeyValueObservingOptionNew
context:nil];

    [self
addObserver:self
forKeyPath:kPlaceholderKey

              options:NSKeyValueObservingOptionNew
context:nil];

    [self
addObserver:self
forKeyPath:kFontKey

              options:NSKeyValueObservingOptionNew
context:nil];

    [self
addObserver:self
forKeyPath:kAttributedTextKey

              options:NSKeyValueObservingOptionNew
context:nil];

    [self
addObserver:self
forKeyPath:kTextKey

              options:NSKeyValueObservingOptionNew
context:nil];

    [self
addObserver:self
forKeyPath:kTextAlignmentKey

              options:NSKeyValueObservingOptionNew
context:nil];

    if (HAS_TEXT_CONTAINER) {

        [self.textContainer
addObserver:self
forKeyPath:kExclusionPathsKey

                                options:NSKeyValueObservingOptionNew
context:nil];

        [self.textContainer
addObserver:self
forKeyPath:kLineFragmentPaddingKey

                                options:NSKeyValueObservingOptionNew
context:nil];
    }

    if (HAS_TEXT_CONTAINER_INSETS(self)) {

        [self
addObserver:self
forKeyPath:kTextContainerInsetKey

                  options:NSKeyValueObservingOptionNew
context:nil];
    }
}

- (void)setPlaceholder:(NSString *)placeholderText
{
   
_placeholder = [placeholderText
copy];
   
_attributedPlaceholder = [[NSAttributedString
alloc] initWithString:placeholderText];

    [self
resizePlaceholderFrame];
}

- (void)setAttributedPlaceholder:(NSAttributedString *)attributedPlaceholderText
{
   
_placeholder = attributedPlaceholderText.string;
   
_attributedPlaceholder = [attributedPlaceholderText
copy];

    [self
resizePlaceholderFrame];
}

- (void)layoutSubviews
{

    [super
layoutSubviews];

    [self
resizePlaceholderFrame];
}

- (void)resizePlaceholderFrame
{

    CGRect frame =
self._placeholderTextView.frame;
    frame.size =
self.bounds.size;

    self._placeholderTextView.frame = frame;
}

- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object
                        change:(NSDictionary *)change context:(void *)context
{

    if ([keyPath
isEqualToString:kAttributedPlaceholderKey]) {

        self._placeholderTextView.attributedText = [change
valueForKey:NSKeyValueChangeNewKey];
    }
   
else if ([keyPath
isEqualToString:kPlaceholderKey]) {

        self._placeholderTextView.text = [change
valueForKey:NSKeyValueChangeNewKey];
    }
   
else if ([keyPath
isEqualToString:kFontKey]) {

        self._placeholderTextView.font = [change
valueForKey:NSKeyValueChangeNewKey];
    }
   
else if ([keyPath
isEqualToString:kAttributedTextKey]) {
       
NSAttributedString *newAttributedText = [change
valueForKey:NSKeyValueChangeNewKey];
        [self
setPlaceholderVisibleForText:newAttributedText.string];
    }
   
else if ([keyPath
isEqualToString:kTextKey]) {
       
NSString *newText = [change
valueForKey:NSKeyValueChangeNewKey];

        [self
setPlaceholderVisibleForText:newText];
    }
   
else if ([keyPath
isEqualToString:kExclusionPathsKey]) {

        self._placeholderTextView.textContainer.exclusionPaths
= [change objectForKey:NSKeyValueChangeNewKey];

        [self
resizePlaceholderFrame];
    }

    else
if ([keyPath
isEqualToString:kLineFragmentPaddingKey]) {

        self._placeholderTextView.textContainer.lineFragmentPadding
= [[change objectForKey:NSKeyValueChangeNewKey]
floatValue];

        [self
resizePlaceholderFrame];
    }

    else
if ([keyPath
isEqualToString:kTextContainerInsetKey]) {
       
NSValue *value = [change
objectForKey:NSKeyValueChangeNewKey];
       
self._placeholderTextView.textContainerInset = value.UIEdgeInsetsValue;
    }
   
else if ([keyPath
isEqualToString:kTextAlignmentKey]) {
       
NSNumber *alignment = [change
objectForKey:NSKeyValueChangeNewKey];
       
self._placeholderTextView.textAlignment = alignment.intValue;
    }
   
else {
        [super
observeValueForKeyPath:keyPath
ofObject:object change:change
context:context];
    }
}

- (void)setPlaceholderTextColor:(UIColor *)placeholderTextColor
{
   
self._placeholderTextView.textColor = placeholderTextColor;
}

- (UIColor *)placeholderTextColor
{

    return
self._placeholderTextView.textColor;
}

- (void)textDidChange:(NSNotification *)aNotification
{

    [self
setPlaceholderVisibleForText:self.text];
}

- (BOOL)becomeFirstResponder
{

    [self
setPlaceholderVisibleForText:self.text];

    return [super
becomeFirstResponder];
}

- (void)setPlaceholderVisibleForText:(NSString *)text
{
   
if (text.length <
1) {

        [self
addSubview:self._placeholderTextView];

        [self
sendSubviewToBack:self._placeholderTextView];
    }
else {

        [self._placeholderTextView
removeFromSuperview];
    }
}

- (void)dealloc
{

    [[NSNotificationCenter
defaultCenter] removeObserver:self];

    [self
removeObserver:self
forKeyPath:kAttributedPlaceholderKey];

    [self
removeObserver:self
forKeyPath:kPlaceholderKey];

    [self
removeObserver:self
forKeyPath:kFontKey];

    [self
removeObserver:self
forKeyPath:kAttributedTextKey];

    [self
removeObserver:self
forKeyPath:kTextKey];

    [self
removeObserver:self
forKeyPath:kTextAlignmentKey];

    if (HAS_TEXT_CONTAINER) {

        [self.textContainer
removeObserver:self
forKeyPath:kExclusionPathsKey];

        [self.textContainer
removeObserver:self
forKeyPath:kLineFragmentPaddingKey];
    }

    if (HAS_TEXT_CONTAINER_INSETS(self)) {

        [self
removeObserver:self
forKeyPath:kTextContainerInsetKey];
    }
}

@end