ZJLM/Pods/IQKeyboardManager/IQKeyboardManager/IQToolbar/IQTitleBarButtonItem.m

//
// IQTitleBarButtonItem.m
// https://github.com/hackiftekhar/IQKeyboardManager
// Copyright (c) 2013-16 Iftekhar Qurashi.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

#import "IQTitleBarButtonItem.h"
#import "IQKeyboardManagerConstants.h"
#import "IQKeyboardManagerConstantsInternal.h"

#import <UIKit/UILabel.h>
#import <UIKit/UIButton.h>

@interface IQTitleBarButtonItem ()

@property(nonatomic, strong) UIView *titleView;
@property(nonatomic, strong) UIButton *titleButton;

@end

@implementation IQTitleBarButtonItem

-(nonnull instancetype)initWithTitle:(nullable NSString *)title
{
    self = [super init];
    if (self)
    {
        _titleView = [[UIView alloc] init];
        _titleView.backgroundColor = [UIColor clearColor];

        _titleButton = [UIButton buttonWithType:UIButtonTypeSystem];
        _titleButton.enabled = NO;
        _titleButton.titleLabel.numberOfLines = 3;
        [_titleButton setTitleColor:[UIColor colorWithRed:0.0 green:0.5 blue:1.0 alpha:1.0] forState:UIControlStateNormal];
        [_titleButton setTitleColor:[UIColor lightGrayColor] forState:UIControlStateDisabled];
        [_titleButton setBackgroundColor:[UIColor clearColor]];
        [_titleButton.titleLabel setTextAlignment:NSTextAlignmentCenter];
        [self setTitle:title];
        [self setTitleFont:[UIFont systemFontOfSize:13.0]];
        [_titleView addSubview:_titleButton];
        
#ifdef __IPHONE_11_0
        if (@available(iOS 11.0, *))
        {
            CGFloat layoutDefaultLowPriority = UILayoutPriorityDefaultLow-1;
            CGFloat layoutDefaultHighPriority = UILayoutPriorityDefaultHigh-1;

            _titleView.translatesAutoresizingMaskIntoConstraints = NO;
            [_titleView setContentHuggingPriority:layoutDefaultLowPriority forAxis:UILayoutConstraintAxisVertical];
            [_titleView setContentHuggingPriority:layoutDefaultLowPriority forAxis:UILayoutConstraintAxisHorizontal];
            [_titleView setContentCompressionResistancePriority:layoutDefaultHighPriority forAxis:UILayoutConstraintAxisVertical];
            [_titleView setContentCompressionResistancePriority:layoutDefaultHighPriority forAxis:UILayoutConstraintAxisHorizontal];
            
            _titleButton.translatesAutoresizingMaskIntoConstraints = NO;
            [_titleButton setContentHuggingPriority:layoutDefaultLowPriority forAxis:UILayoutConstraintAxisVertical];
            [_titleButton setContentHuggingPriority:layoutDefaultLowPriority forAxis:UILayoutConstraintAxisHorizontal];
            [_titleButton setContentCompressionResistancePriority:layoutDefaultHighPriority forAxis:UILayoutConstraintAxisVertical];
            [_titleButton setContentCompressionResistancePriority:layoutDefaultHighPriority forAxis:UILayoutConstraintAxisHorizontal];

            NSLayoutConstraint *top = [NSLayoutConstraint constraintWithItem:_titleButton attribute:NSLayoutAttributeTop relatedBy:NSLayoutRelationEqual toItem:_titleView attribute:NSLayoutAttributeTop multiplier:1 constant:0];
            NSLayoutConstraint *bottom = [NSLayoutConstraint constraintWithItem:_titleButton attribute:NSLayoutAttributeBottom relatedBy:NSLayoutRelationEqual toItem:_titleView attribute:NSLayoutAttributeBottom multiplier:1 constant:0];
            NSLayoutConstraint *leading = [NSLayoutConstraint constraintWithItem:_titleButton attribute:NSLayoutAttributeLeading relatedBy:NSLayoutRelationEqual toItem:_titleView attribute:NSLayoutAttributeLeading multiplier:1 constant:0];
            NSLayoutConstraint *trailing = [NSLayoutConstraint constraintWithItem:_titleButton attribute:NSLayoutAttributeTrailing relatedBy:NSLayoutRelationEqual toItem:_titleView attribute:NSLayoutAttributeTrailing multiplier:1 constant:0];
            [_titleView addConstraints:@[top,bottom,leading,trailing]];
        }
        else
#endif
        {
            _titleView.autoresizingMask = UIViewAutoresizingFlexibleWidth|UIViewAutoresizingFlexibleHeight;
            _titleButton.autoresizingMask = UIViewAutoresizingFlexibleWidth|UIViewAutoresizingFlexibleHeight;
        }

        self.customView = _titleView;
    }
    return self;
}

-(void)setTitleFont:(UIFont *)titleFont
{
    _titleFont = titleFont;
    
    if (titleFont)
    {
        _titleButton.titleLabel.font = titleFont;
    }
    else
    {
        _titleButton.titleLabel.font = [UIFont systemFontOfSize:13];
    }
}

-(void)setTitle:(NSString *)title
{
    [super setTitle:title];
    [_titleButton setTitle:title forState:UIControlStateNormal];
}

-(void)setTitleColor:(UIColor*)titleColor
{
    _titleColor = titleColor;
    [_titleButton setTitleColor:_titleColor?:[UIColor lightGrayColor] forState:UIControlStateDisabled];
}

-(void)setSelectableTitleColor:(UIColor*)selectableTitleColor
{
    _selectableTitleColor = selectableTitleColor;
    [_titleButton setTitleColor:_selectableTitleColor?:[UIColor colorWithRed:0.0 green:0.5 blue:1.0 alpha:1.0] forState:UIControlStateNormal];
}

-(void)setInvocation:(NSInvocation *)invocation
{
    [super setInvocation:invocation];
    
    if (invocation.target == nil || invocation.selector == NULL)
    {
        self.enabled = NO;
        _titleButton.enabled = NO;
        [_titleButton removeTarget:nil action:NULL forControlEvents:UIControlEventTouchUpInside];
    }
    else
    {
        self.enabled = YES;
        _titleButton.enabled = YES;
        [_titleButton addTarget:invocation.target action:invocation.selector forControlEvents:UIControlEventTouchUpInside];
    }
}

-(void)dealloc
{
    self.customView = nil;
    [_titleButton removeTarget:nil action:NULL forControlEvents:UIControlEventTouchUpInside];
    _titleView = nil;
    _titleButton = nil;
}

@end