erpsuiteios/Redant Drivers/Apex And Drivers/Update/Model/RAEditLabelModel.m

//
//  RAEditLabelModel.m
//  Apex And Drivers
//
//  Created by Jack on 2018/6/4.
//  Copyright © 2018年 USAI. All rights reserved.
//

#import "RAEditLabelModel.h"

static const CGFloat SpaceWidth = 10.0f;
static const CGFloat SpaceHeight = 40.0f;

@implementation RAEditLabelModel {
    CGFloat _height;
}

- (CGFloat)height {
    if (_height <= 0) {
        [self caculateValueHeight];
    }
    return _height;
}

- (void)setValue:(NSString *)value {
    _value = value;
    
    dispatch_async(dispatch_get_global_queue(0, 0), ^{
        [self caculateValueHeight];
    });
}

- (void)caculateValueHeight {

    CGFloat w = [UIScreen mainScreen].bounds.size.width;
    if (w <= 0) {
        w = CGRectGetWidth([UIScreen mainScreen].bounds);
    }
    
    CGFloat h = [self.value boundingRectWithSize:CGSizeMake(w - SpaceWidth, FLT_MAX)
                                         options:(NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading)
                                      attributes:@{NSFontAttributeName:[UIFont systemFontOfSize:14.0f]}
                                         context:nil].size.height;
    _height = h + SpaceHeight;
    if (_height < 55.0f) {
        _height = 55.0f;
    }
}

@end