weak情况

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@property (weak,nonatomic) UILabel *nameLabel;
 
UILabel *nameLabel = [[UILabel alloc] init];
self.nameLabel = nameLabel;

strong情况

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@property (strong,nonatomic) UILabel *timeLabel;
 
- (UILabel *)timeLabel
{
    if (!_timeLabel) {
        _timeLabel = [[UILabel alloc] init];
    }
    return _timeLabel;
}
05-11 18:01