ボタンを一時的に無効化する

簡易的な連打防止に。

@interface UIControl (AfterDelay)
- (void)setEnabled:(BOOL)enabled afterDelay:(NSTimeInterval)delay;
@end

@implementation
- (void)setEnabled:(BOOL)enabled afterDelay:(NSTimeInterval)delay
{
    int64_t delayInMilliSeconds = delay * 1000;
    dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, delayInMilliSeconds * NSEC_PER_MSEC);
    dispatch_after(popTime, dispatch_get_main_queue(), ^(void){
        [self setEnabled:enabled];
    });
}
@end

- (void)buttonAction:(UIButton *)button
{
    [button setEnabled:NO];
    [button setEnabled:YES afterDelay:0.8];
}