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UIResponder+KeyboardCache.m
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UIResponder+KeyboardCache.m
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// UIResponder+KeyboardCache
//
// Copyright (c) 2012 Brandon Williams (http://www.opetopic.com)
//
// 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 "UIResponder+KeyboardCache.h"
static BOOL hasAlreadyCachedKeyboard;
@interface UIResponder (KeyboardCache_Private)
+(void) __cacheKeyboard;
@end
@implementation UIResponder (KeyboardCache)
+(void) cacheKeyboard {
[[self class] cacheKeyboard:NO];
}
+(void) cacheKeyboard:(BOOL)onNextRunloop {
if (! hasAlreadyCachedKeyboard)
{
hasAlreadyCachedKeyboard = YES;
if (onNextRunloop)
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, 0.0), dispatch_get_main_queue(), ^(void){ [[self class] __cacheKeyboard]; });
else
[[self class] __cacheKeyboard];
}
}
+(void) __cacheKeyboard {
UITextField *field = [UITextField new];
[[[[UIApplication sharedApplication] windows] lastObject] addSubview:field];
[field becomeFirstResponder];
[field resignFirstResponder];
[field removeFromSuperview];
}
@end