Verification code Timing--UIButton settitle flicker Problem Solution

First, there are various versions

Method One:

An extremely simple version of my application: Setting the type of UIButton to Custom will not reproduce the problem of flicker

@property (strong, nonatomic) iboutlet UIButton *getcodebtn;

@property (nonatomic, strong) Nstimer *timercode; // Verification Code timer

__block int lefttime;

-(void) dealloc {

if ([_timercode isValid]) {

[_timercode invalidate];

_timercode = nil;

}

}

#pragma mark-Verification code

Resend Verification Code

-(ibaction) resendcodebtnpressed: (UIButton *) Sender {

// determine which network request to send a verification code

//...

Sender. enabled = NO;

lefttime = ;

[self startonetimer];

// Send verification code request

[self. ViewModel requestwithsendcode: [kuserdefault objectforkey:_isresetpassword ? kforgetmobile:kloginmobile] block: ^ (BOOL flag) {

}];

}

/**

* wait some time after sending verification code

*/

-(void) Startonetimer {

_getcodebtn. Enabled = NO;

lefttime = ;

_timercode = [nstimer scheduledtimerwithtimeinterval:1 block: ^{

if (lefttime = = 0) {

_getcodebtn. Enabled = YES;

[_getcodebtn settitle:" resend " forstate: UIControlStateNormal];

[_getcodebtn settitlecolor:fcc639 forstate:uicontrolstatenormal];

// timer complete, destroy timer

[_timercode invalidate];

_timercode = nil;

lefttime = ;

return ;

}

lefttime--;

        [_getcodebtn settitle:[nsstring Stringwithformat:@ "%i seconds after re-sending lefttime] forstate:uicontrolstatenormal

[_getcodebtn settitlecolor: [uicolor lightgraycolor] forstate: UIControlStateNormal];

} repeats:YES];

}

Method Two: Is on the UIButton cover a same size uilabel, and then each time the Uilabel text refresh, do not refresh the button, the effect is good, no longer flashing

Links: http://blog.csdn.net/kyfxbl/article/details/17619221

Method Three: Https://www.cnblogs.com/manji/p/4813520.html

Add: My method uses to prevent the timer not to be destroyed the timerblocks please search by oneself

Nstimer+blocks.h

//

Created by Jiva DeVoe on 1/14/11.

Copyright: Random Ideas, LLC. All rights reserved.

Verification code Timing--UIButton settitle flicker Problem Solution