iOS 开发技巧总结

dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.5 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
if (!_processFlowView.hidden) {
return ;
}
_processFlowView.hidden = NO;
_processFlowViewLeft.constant = _windNameStart;
[self layoutIfNeeded];
[UIView animateWithDuration:0.5 animations:^{
_processFlowViewLeft.constant = _windNameEnd;
[self layoutIfNeeded];
} completion:^(BOOL finished) {
_processFlowView.hidden = YES;
}];
});