摘要：
#pragma mark--计算字符串长度 - (CGSize)strsizewithstr:(NSString *)str{ NSDictionary *attributes = @{NSFontAttributeName:[UIFont systemFontOfSize:20]}; CGSize 阅读全文
摘要：
UIButton *clearButton = [self.textField valueForKey:@"_clearButton"]; [clearButton setImage:[UIImage imageNamed:@"close"] forState:UIControlStateNorma 阅读全文